diff --git a/Cargo.lock b/Cargo.lock
index 1eff947..f7d0460 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -194,12 +194,31 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "ascii-canvas"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8824ecca2e851cec16968d54a01dd372ef8f95b244fb84b84e70128be347c3c6"
+dependencies = [
+ "term",
+]
+
 [[package]]
 name = "asn1_der"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "155a5a185e42c6b77ac7b88a15143d930a9e9727a5b7b77eed417404ab15c247"
 
+[[package]]
+name = "assert-json-diff"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47e4f2b81832e72834d7518d8487a0396a28cc408186a2e8854c0f98011faf12"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "assert_cmd"
 version = "2.0.16"
@@ -216,6 +235,221 @@ dependencies = [
  "wait-timeout",
 ]
 
+[[package]]
+name = "async-attributes"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3203e79f4dd9bdda415ed03cf14dae5a2bf775c683a00f94e9cd1faf0f596e5"
+dependencies = [
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "async-channel"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81953c529336010edd6d8e358f886d9581267795c61b19475b71314bffa46d35"
+dependencies = [
+ "concurrent-queue",
+ "event-listener 2.5.3",
+ "futures-core",
+]
+
+[[package]]
+name = "async-channel"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89b47800b0be77592da0afd425cc03468052844aff33b84e33cc696f64e77b6a"
+dependencies = [
+ "concurrent-queue",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-executor"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7ebdfa2ebdab6b1760375fa7d6f382b9f486eac35fc994625a00e89280bdbb7"
+dependencies = [
+ "async-task",
+ "concurrent-queue",
+ "fastrand 2.1.0",
+ "futures-lite 2.3.0",
+ "slab",
+]
+
+[[package]]
+name = "async-global-executor"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05b1b633a2115cd122d73b955eadd9916c18c8f510ec9cd1686404c60ad1c29c"
+dependencies = [
+ "async-channel 2.3.1",
+ "async-executor",
+ "async-io 2.3.4",
+ "async-lock 3.4.0",
+ "blocking",
+ "futures-lite 2.3.0",
+ "once_cell",
+]
+
+[[package]]
+name = "async-io"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fc5b45d93ef0529756f812ca52e44c221b35341892d3dcc34132ac02f3dd2af"
+dependencies = [
+ "async-lock 2.8.0",
+ "autocfg",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-lite 1.13.0",
+ "log",
+ "parking",
+ "polling 2.8.0",
+ "rustix 0.37.27",
+ "slab",
+ "socket2 0.4.10",
+ "waker-fn",
+]
+
+[[package]]
+name = "async-io"
+version = "2.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "444b0228950ee6501b3568d3c93bf1176a1fdbc3b758dcd9475046d30f4dc7e8"
+dependencies = [
+ "async-lock 3.4.0",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-io",
+ "futures-lite 2.3.0",
+ "parking",
+ "polling 3.7.3",
+ "rustix 0.38.34",
+ "slab",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "async-lock"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "287272293e9d8c41773cec55e365490fe034813a2f172f502d6ddcf75b2f582b"
+dependencies = [
+ "event-listener 2.5.3",
+]
+
+[[package]]
+name = "async-lock"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff6e472cdea888a4bd64f342f09b3f50e1886d32afe8df3d663c01140b811b18"
+dependencies = [
+ "event-listener 5.3.1",
+ "event-listener-strategy",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-object-pool"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aeb901c30ebc2fc4ab46395bbfbdba9542c16559d853645d75190c3056caf3bc"
+dependencies = [
+ "async-std",
+]
+
+[[package]]
+name = "async-process"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea6438ba0a08d81529c69b36700fa2f95837bfe3e776ab39cde9c14d9149da88"
+dependencies = [
+ "async-io 1.13.0",
+ "async-lock 2.8.0",
+ "async-signal",
+ "blocking",
+ "cfg-if",
+ "event-listener 3.1.0",
+ "futures-lite 1.13.0",
+ "rustix 0.38.34",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "async-signal"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "637e00349800c0bdf8bfc21ebbc0b6524abea702b0da4168ac00d070d0c0b9f3"
+dependencies = [
+ "async-io 2.3.4",
+ "async-lock 3.4.0",
+ "atomic-waker",
+ "cfg-if",
+ "futures-core",
+ "futures-io",
+ "rustix 0.38.34",
+ "signal-hook-registry",
+ "slab",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "async-std"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62565bb4402e926b29953c785397c6dc0391b7b446e45008b0049eb43cec6f5d"
+dependencies = [
+ "async-attributes",
+ "async-channel 1.9.0",
+ "async-global-executor",
+ "async-io 1.13.0",
+ "async-lock 2.8.0",
+ "async-process",
+ "crossbeam-utils",
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-lite 1.13.0",
+ "gloo-timers",
+ "kv-log-macro",
+ "log",
+ "memchr",
+ "once_cell",
+ "pin-project-lite",
+ "pin-utils",
+ "slab",
+ "wasm-bindgen-futures",
+]
+
+[[package]]
+name = "async-task"
+version = "4.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
+
+[[package]]
+name = "async-trait"
+version = "0.1.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e0c28dcc82d7c8ead5cb13beb15405b57b8546e93215673ff8ca0349a028107"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.75",
+]
+
+[[package]]
+name = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -267,6 +501,17 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
 
+[[package]]
+name = "basic-cookies"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67bd8fd42c16bdb08688243dc5f0cc117a3ca9efeeaba3a345a18a6159ad96f7"
+dependencies = [
+ "lalrpop",
+ "lalrpop-util",
+ "regex",
+]
+
 [[package]]
 name = "bindgen"
 version = "0.66.1"
@@ -290,6 +535,21 @@ dependencies = [
  "which",
 ]
 
+[[package]]
+name = "bit-set"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -332,6 +592,19 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "blocking"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "703f41c54fc768e63e091340b424302bb1c29ef4aa0c7f10fe849dfb114d29ea"
+dependencies = [
+ "async-channel 2.3.1",
+ "async-task",
+ "futures-io",
+ "futures-lite 2.3.0",
+ "piper",
+]
+
 [[package]]
 name = "bls"
 version = "0.2.0"
@@ -574,7 +847,7 @@ name = "compare_fields"
 version = "0.2.0"
 source = "git+https://github.com/ChorusOne/lighthouse?rev=1be5253610dc8fee3bf4b7a8dc1d01254bc5b57d#1be5253610dc8fee3bf4b7a8dc1d01254bc5b57d"
 dependencies = [
- "itertools",
+ "itertools 0.10.5",
 ]
 
 [[package]]
@@ -586,6 +859,15 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "concurrent-queue"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.6"
@@ -1031,6 +1313,15 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "ena"
+version = "0.14.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d248bdd43ce613d87415282f69b9bb99d947d290b10962dd6c56233312c2ad5"
+dependencies = [
+ "log",
+]
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.34"
@@ -1123,11 +1414,13 @@ dependencies = [
  "ethereum_ssz_derive",
  "getrandom",
  "hex",
+ "httpmock",
  "lazy_static",
  "log",
  "predicates",
  "pretty_assertions",
  "regex",
+ "reqwest",
  "serde",
  "serde_derive",
  "serde_json",
@@ -1136,6 +1429,7 @@ dependencies = [
  "tree_hash",
  "tree_hash_derive",
  "types",
+ "url",
  "uuid 1.10.0",
 ]
 
@@ -1304,7 +1598,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d3627f83d8b87b432a5fad9934b4565260722a141a2c40f371f8080adec9425"
 dependencies = [
  "ethereum-types",
- "itertools",
+ "itertools 0.10.5",
  "smallvec",
 ]
 
@@ -1320,6 +1614,44 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "event-listener"
+version = "2.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
+
+[[package]]
+name = "event-listener"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d93877bcde0eb80ca09131a08d23f0a5c18a620b01db137dba666d18cd9b30c2"
+dependencies = [
+ "concurrent-queue",
+ "parking",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "event-listener"
+version = "5.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6032be9bd27023a771701cc49f9f053c751055f71efb2e0ae5c15809093675ba"
+dependencies = [
+ "concurrent-queue",
+ "parking",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "event-listener-strategy"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f214dc438f977e6d4e3500aaa277f5ad94ca83fbbd9b1a15713ce2344ccc5a1"
+dependencies = [
+ "event-listener 5.3.1",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "fallible-iterator"
 version = "0.2.0"
@@ -1332,6 +1664,15 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
 
+[[package]]
+name = "fastrand"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51093e27b0797c359783294ca4f0a911c270184cb10f85783b118614a1501be"
+dependencies = [
+ "instant",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.1.0"
@@ -1377,6 +1718,12 @@ dependencies = [
  "static_assertions",
 ]
 
+[[package]]
+name = "fixedbitset"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
+
 [[package]]
 name = "flate2"
 version = "1.0.31"
@@ -1481,6 +1828,34 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
 
+[[package]]
+name = "futures-lite"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49a9d51ce47660b1e808d3c990b4709f2f415d928835a17dfd16991515c46bce"
+dependencies = [
+ "fastrand 1.9.0",
+ "futures-core",
+ "futures-io",
+ "memchr",
+ "parking",
+ "pin-project-lite",
+ "waker-fn",
+]
+
+[[package]]
+name = "futures-lite"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52527eb5074e35e9339c6b4e8d12600c7128b68fb25dcb9fa9dec18f7c25f3a5"
+dependencies = [
+ "fastrand 2.1.0",
+ "futures-core",
+ "futures-io",
+ "parking",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.30"
@@ -1572,6 +1947,18 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
 
+[[package]]
+name = "gloo-timers"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b995a66bb87bebce9a0f4a95aed01daca4872c050bfcb21653361c03bc35e5c"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "group"
 version = "0.13.0"
@@ -1743,6 +2130,34 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
+[[package]]
+name = "httpmock"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08ec9586ee0910472dec1a1f0f8acf52f0fdde93aea74d70d4a3107b4be0fd5b"
+dependencies = [
+ "assert-json-diff",
+ "async-object-pool",
+ "async-std",
+ "async-trait",
+ "base64 0.21.7",
+ "basic-cookies",
+ "crossbeam-utils",
+ "form_urlencoded",
+ "futures-util",
+ "hyper",
+ "lazy_static",
+ "levenshtein",
+ "log",
+ "regex",
+ "serde",
+ "serde_json",
+ "serde_regex",
+ "similar",
+ "tokio",
+ "url",
+]
+
 [[package]]
 name = "humantime"
 version = "2.1.0"
@@ -1913,6 +2328,17 @@ dependencies = [
  "bytes",
 ]
 
+[[package]]
+name = "io-lifetimes"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eae7b9aee968036d54dce06cebaefd919e4472e753296daccd6d344e3e2df0c2"
+dependencies = [
+ "hermit-abi 0.3.9",
+ "libc",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.9.0"
@@ -1945,6 +2371,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.11"
@@ -1992,6 +2427,15 @@ dependencies = [
  "cpufeatures",
 ]
 
+[[package]]
+name = "kv-log-macro"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0de8b303297635ad57c9f5059fd9cee7a47f8e8daa09df0fcd07dd39fb22977f"
+dependencies = [
+ "log",
+]
+
 [[package]]
 name = "kzg"
 version = "0.1.0"
@@ -2009,6 +2453,37 @@ dependencies = [
  "tree_hash",
 ]
 
+[[package]]
+name = "lalrpop"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55cb077ad656299f160924eb2912aa147d7339ea7d69e1b5517326fdcec3c1ca"
+dependencies = [
+ "ascii-canvas",
+ "bit-set",
+ "ena",
+ "itertools 0.11.0",
+ "lalrpop-util",
+ "petgraph",
+ "pico-args",
+ "regex",
+ "regex-syntax 0.8.4",
+ "string_cache",
+ "term",
+ "tiny-keccak",
+ "unicode-xid",
+ "walkdir",
+]
+
+[[package]]
+name = "lalrpop-util"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "507460a910eb7b32ee961886ff48539633b788a36b65692b95f225b844c82553"
+dependencies = [
+ "regex-automata 0.4.7",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -2024,6 +2499,12 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
+[[package]]
+name = "levenshtein"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
+
 [[package]]
 name = "libc"
 version = "0.2.158"
@@ -2259,6 +2740,12 @@ dependencies = [
  "prometheus",
 ]
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef53942eb7bf7ff43a617b3e2c1c4a5ecf5944a7c1bc12d7ee39bbb15e5c1519"
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.4.14"
@@ -2280,6 +2767,9 @@ name = "log"
 version = "0.4.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
+dependencies = [
+ "value-bag",
+]
 
 [[package]]
 name = "logging"
@@ -2371,7 +2861,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c3a991d4536c933306e52f0e8ab303757185ec13a09d1f3e1cbde5a0d8410bf"
 dependencies = [
  "darling",
- "itertools",
+ "itertools 0.10.5",
  "proc-macro2",
  "quote",
  "smallvec",
@@ -2487,6 +2977,12 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "new_debug_unreachable"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -2693,6 +3189,12 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "parking"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb813b8af86854136c6922af0598d719255ecb2179515e6e7730d468f05c9cae"
+
 [[package]]
 name = "parking_lot"
 version = "0.11.2"
@@ -2791,6 +3293,31 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
+[[package]]
+name = "petgraph"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4c5cc86750666a3ed20bdaf5ca2a0344f9c67674cae0515bec2da16fbaa47db"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6796ad771acdc0123d2a88dc428b5e38ef24456743ddb1744ed628f9815c096"
+dependencies = [
+ "siphasher",
+]
+
+[[package]]
+name = "pico-args"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5be167a7af36ee22fe3115051bc51f6e6c7054c9348e28deb4f49bd6f705a315"
+
 [[package]]
 name = "pin-project"
 version = "1.1.5"
@@ -2823,6 +3350,17 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "piper"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96c8c490f422ef9a4efd2cb5b42b76c8613d7e7dfc1caf667b8a3350a5acc066"
+dependencies = [
+ "atomic-waker",
+ "fastrand 2.1.0",
+ "futures-io",
+]
+
 [[package]]
 name = "pkcs8"
 version = "0.10.2"
@@ -2839,6 +3377,37 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "polling"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b2d323e8ca7996b3e23126511a523f7e62924d93ecd5ae73b333815b0eb3dce"
+dependencies = [
+ "autocfg",
+ "bitflags 1.3.2",
+ "cfg-if",
+ "concurrent-queue",
+ "libc",
+ "log",
+ "pin-project-lite",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "polling"
+version = "3.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc2790cd301dec6cd3b7a025e4815cf825724a51c98dccfe6a3e55f05ffb6511"
+dependencies = [
+ "cfg-if",
+ "concurrent-queue",
+ "hermit-abi 0.4.0",
+ "pin-project-lite",
+ "rustix 0.38.34",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "polyval"
 version = "0.5.3"
@@ -2866,6 +3435,12 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "precomputed-hash"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
+
 [[package]]
 name = "predicates"
 version = "3.1.2"
@@ -3276,6 +3851,20 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.37.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fea8ca367a3a01fe35e6943c400addf443c0f57670e6ec51196f71a4b8762dd2"
+dependencies = [
+ "bitflags 1.3.2",
+ "errno",
+ "io-lifetimes",
+ "libc",
+ "linux-raw-sys 0.3.8",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "rustix"
 version = "0.38.34"
@@ -3285,7 +3874,7 @@ dependencies = [
  "bitflags 2.6.0",
  "errno",
  "libc",
- "linux-raw-sys",
+ "linux-raw-sys 0.4.14",
  "windows-sys 0.52.0",
 ]
 
@@ -3356,6 +3945,15 @@ dependencies = [
  "cipher 0.3.0",
 ]
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.23"
@@ -3477,6 +4075,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_regex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8136f1a4ea815d7eac4101cfd0b16dc0cb5e1fe1b8609dfd728058656b7badf"
+dependencies = [
+ "regex",
+ "serde",
+]
+
 [[package]]
 name = "serde_repr"
 version = "0.1.19"
@@ -3592,6 +4200,18 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "similar"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1de1d4f81173b03af4c0cbed3c898f6bff5b870e4a7f5d6f4057d62a7a4b686e"
+
+[[package]]
+name = "siphasher"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38b58827f4464d87d377d175e90bf58eb00fd8716ff0a62f80356b5e61555d0d"
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -3761,7 +4381,7 @@ dependencies = [
  "derivative",
  "ethereum_serde_utils",
  "ethereum_ssz",
- "itertools",
+ "itertools 0.10.5",
  "serde",
  "serde_derive",
  "smallvec",
@@ -3775,6 +4395,19 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "string_cache"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f91138e76242f575eb1d3b38b4f1362f10d3a43f47d182a5b359af488a02293b"
+dependencies = [
+ "new_debug_unreachable",
+ "once_cell",
+ "parking_lot 0.12.3",
+ "phf_shared",
+ "precomputed-hash",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -3822,7 +4455,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75b9e5728aa1a87141cefd4e7509903fc01fa0dcb108022b1e841a67c5159fc5"
 dependencies = [
  "darling",
- "itertools",
+ "itertools 0.10.5",
  "proc-macro2",
  "quote",
  "smallvec",
@@ -3906,9 +4539,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04cbcdd0c794ebb0d4cf35e88edd2f7d2c4c3e9a5a6dab322839b321c6a87a64"
 dependencies = [
  "cfg-if",
- "fastrand",
+ "fastrand 2.1.0",
  "once_cell",
- "rustix",
+ "rustix 0.38.34",
  "windows-sys 0.59.0",
 ]
 
@@ -4304,7 +4937,7 @@ dependencies = [
  "ethereum_ssz_derive",
  "hex",
  "int_to_bytes",
- "itertools",
+ "itertools 0.10.5",
  "kzg",
  "lazy_static",
  "log",
@@ -4367,6 +5000,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "229730647fbc343e3a80e463c1db7f78f3855d3f3739bee0dda773c9a037c90a"
+
 [[package]]
 name = "universal-hash"
 version = "0.4.1"
@@ -4449,6 +5088,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "value-bag"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a84c137d37ab0142f0f2ddfe332651fdbf252e7b7dbb4e67b6c1f1b2e925101"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -4476,6 +5121,22 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "waker-fn"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "317211a0dc0ceedd78fb2ca9a44aed3d7b9b26f81870d485c07122b4350673b7"
+
+[[package]]
+name = "walkdir"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -4596,7 +5257,7 @@ dependencies = [
  "either",
  "home",
  "once_cell",
- "rustix",
+ "rustix 0.38.34",
 ]
 
 [[package]]
@@ -4621,6 +5282,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
diff --git a/Cargo.toml b/Cargo.toml
index 962f655..5edce20 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,8 @@ env_logger = "^0.11"
 hex = "0.4"
 lazy_static = "1.5"
 log = "^0.4"
+# eth2_network_config uses native-tls, so do we
+reqwest = { version = "0.11", default-features = false, features = ["native-tls"] }
 getrandom = "0.2"
 regex = "1.10.6"
 serde = "1.0.204"
@@ -35,6 +37,7 @@ tiny-bip39 = "1.0.0"
 tree_hash = "0.5.2"
 tree_hash_derive = "0.5.2"
 types = { git = "https://github.com/ChorusOne/lighthouse", rev = "1be5253610dc8fee3bf4b7a8dc1d01254bc5b57d"}
+url = "2.5"
 uuid = { version = "1.10", features = ["v4"] }
 
 [dev-dependencies]
@@ -42,6 +45,7 @@ test-log = "^0.2"
 pretty_assertions = "^1.4"
 assert_cmd = "2.0"
 predicates = "3.0"
+httpmock = "0.7"
 
 [[test]]
 name = "e2e-tests"
diff --git a/README.md b/README.md
index 9ad3b8e..32ed811 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ You can use `eth-staking-smith` as follows to convert your address:
 ### Command to generate SignedBLSToExecutionChange
 
 ```
-./target/debug/eth-staking-smith bls-to-execution-change --chain mainnet --mnemonic "entire habit bottom mention spoil clown finger wheat motion fox axis mechanic country make garment bar blind stadium sugar water scissors canyon often ketchup" --validator_start_index 0 --validator_index 100 --withdrawal_credentials "0x0045b91b2f60b88e7392d49ae1364b55e713d06f30e563f9f99e10994b26221d"
+./target/debug/eth-staking-smith bls-to-execution-change --chain mainnet --mnemonic "entire habit bottom mention spoil clown finger wheat motion fox axis mechanic country make garment bar blind stadium sugar water scissors canyon often ketchup" --validator_start_index 0 --validator_index 100 --withdrawal_credentials "0x0045b91b2f60b88e7392d49ae1364b55e713d06f30e563f9f99e10994b26221d" \
 --execution_address "0x71C7656EC7ab88b098defB751B7401B5f6d8976F"
 ```
 
@@ -86,16 +86,13 @@ Note that --validator-index and --validator-start-index are two distinct paramet
 ### Command to send SignedBLSToExecutionChange request to Beacon node
 
 ```
-curl -H "Content-Type: application/json" -d '{
-  "message": {
-    "validator_index": 100,
-    "from_bls_pubkey": "0x0045b91b2f60b88e7392d49ae1364b55e713d06f30e563f9f99e10994b26221d",
-    "to_execution_address": "0x71C7656EC7ab88b098defB751B7401B5f6d8976F"
-  },
-  "signature": "0x9220e5badefdfe8abc36cae01af29b981edeb940ff88c438f72c8af876fbd6416138c85f5348c5ace92a081fa15291aa0ffb856141b871dc807f3ec2fe9c8415cac3d76579c61455ab3938bc162e139d060c8aa13fcd670febe46bf0bb579c5a"
-}' http://localhost:3500/eth/v1/beacon/pool/bls_to_execution_change
+./target/debug/eth-staking-smith bls-to-execution-change --chain mainnet --mnemonic "entire habit bottom mention spoil clown finger wheat motion fox axis mechanic country make garment bar blind stadium sugar water scissors canyon often ketchup" --validator_start_index 0 --validator_index 100 --withdrawal_credentials "0x0045b91b2f60b88e7392d49ae1364b55e713d06f30e563f9f99e10994b26221d" \
+--execution_address "0x71C7656EC7ab88b098defB751B7401B5f6d8976F" \
+--beacon-node-uri http://beacon-node.local:5052
 ```
 
+Notice `--beacon-node-uri` parameter which makes payload to be sent to beacon node
+
 ## Generating pre-signed exit message
 
 It is possible to create pre-signed voluntary exit message for every validator that
@@ -112,6 +109,16 @@ Use `eth-staking-smith` via command line like:
 Note that --validator-beacon-index and --validator-seed-index are two distinct parameter, the former being index of validator on Beacon chain, and the latter is the index of validator private key derived from the seed
 
 
+### Command to send SignedBLSToExecutionChange request to Beacon node
+
+```
+./target/debug/eth-staking-smith presigned-exit-message --chain mainnet --mnemonic "entire habit bottom mention spoil clown finger wheat motion fox axis mechanic country make garment bar blind stadium sugar water scissors canyon often ketchup" --validator_seed_index 0 --validator_beacon_index 100 --epoch 300000 \
+--beacon-node-uri http://beacon-node.local:5052
+```
+
+Notice `--beacon-node-uri` parameter which makes payload to be sent to beacon node
+
+
 ## Exporting CLI standard output into common keystores folder format
 
 Most validator clients recognize the keystore folder format,
diff --git a/src/beacon_node.rs b/src/beacon_node.rs
new file mode 100644
index 0000000..fc1020f
--- /dev/null
+++ b/src/beacon_node.rs
@@ -0,0 +1,44 @@
+#[derive(Debug)]
+pub enum BeaconNodeError {
+    InvalidBeaconNodeURI,
+    ClientConfigurationError,
+    NodeCommunicationError,
+    Non200Response,
+}
+
+/// A trait for types that can be sent to beacon node as-is
+/// without transformations
+pub trait BeaconNodeExportable {
+    /// Export an entity as JSON
+    fn export(&self) -> serde_json::Value;
+
+    /// The path at beacon node where to send data
+    fn beacon_node_path(&self) -> String;
+
+    /// Send the JSON payload to beacon node
+    fn send_beacon_payload(&self, beacon_node_uri: url::Url) -> Result<(), BeaconNodeError> {
+        let reqwc = reqwest::blocking::Client::builder()
+            .build()
+            .map_err(|_| BeaconNodeError::ClientConfigurationError)?;
+        let joined_url = beacon_node_uri
+            .join(&self.beacon_node_path())
+            .map_err(|_| BeaconNodeError::InvalidBeaconNodeURI)?;
+        let resp = reqwc
+            .post(joined_url)
+            .header("Content-Type", "application/json")
+            .body(self.export().to_string())
+            .send();
+
+        match resp {
+            Ok(response) => {
+                let code = response.status().as_u16();
+                if code != 200 {
+                    Err(BeaconNodeError::Non200Response)
+                } else {
+                    Ok(())
+                }
+            }
+            Err(_) => Err(BeaconNodeError::NodeCommunicationError),
+        }
+    }
+}
diff --git a/src/bls_to_execution_change/operator.rs b/src/bls_to_execution_change/operator.rs
index b4b49ba..4925ca5 100644
--- a/src/bls_to_execution_change/operator.rs
+++ b/src/bls_to_execution_change/operator.rs
@@ -5,11 +5,9 @@ use types::{
     SignedRoot,
 };
 
-use crate::utils::get_withdrawal_credentials;
+use crate::{beacon_node::BeaconNodeExportable, utils::get_withdrawal_credentials};
 
 pub(crate) trait SignedBlsToExecutionChangeOperator {
-    fn export(&self) -> serde_json::Value;
-
     fn validate(
         self,
         from_bls_withdrawal_credentials: &str,
@@ -19,18 +17,26 @@ pub(crate) trait SignedBlsToExecutionChangeOperator {
     );
 }
 
-impl SignedBlsToExecutionChangeOperator for SignedBlsToExecutionChange {
+impl BeaconNodeExportable for SignedBlsToExecutionChange {
     fn export(&self) -> serde_json::Value {
-        serde_json::json!({
-            "message": {
-                "validator_index": self.message.validator_index.to_string(),
-                "from_bls_pubkey": self.message.from_bls_pubkey,
-                "to_execution_address": format!("0x{}", hex::encode(self.message.to_execution_address)),
-            },
-            "signature": self.signature.to_string()
-        })
+        serde_json::json!([
+            {
+                "message": {
+                    "validator_index": self.message.validator_index.to_string(),
+                    "from_bls_pubkey": self.message.from_bls_pubkey,
+                    "to_execution_address": format!("0x{}", hex::encode(self.message.to_execution_address)),
+                },
+                "signature": self.signature.to_string()
+            }
+        ])
+    }
+
+    fn beacon_node_path(&self) -> String {
+        "/eth/v1/beacon/pool/bls_to_execution_changes".to_string()
     }
+}
 
+impl SignedBlsToExecutionChangeOperator for SignedBlsToExecutionChange {
     fn validate(
         self,
         from_bls_withdrawal_credentials: &str,
diff --git a/src/cli/bls_to_execution_change.rs b/src/cli/bls_to_execution_change.rs
index 54b9d87..70012dc 100644
--- a/src/cli/bls_to_execution_change.rs
+++ b/src/cli/bls_to_execution_change.rs
@@ -1,6 +1,6 @@
-use crate::bls_to_execution_change;
 use crate::bls_to_execution_change::operator::SignedBlsToExecutionChangeOperator;
 use crate::chain_spec::validators_root_and_spec;
+use crate::{beacon_node::BeaconNodeExportable, bls_to_execution_change};
 use clap::{arg, Parser};
 
 #[derive(Clone, Parser)]
@@ -27,12 +27,12 @@ pub struct BlsToExecutionChangeSubcommandOpts {
     /// and you want to generate for the 2nd validator,
     /// the validator_start_index would be 1.
     /// If no index specified, it will be set to 0.
-    #[arg(long, visible_alias = "validator_start_index")]
-    pub validator_start_index: u32,
+    #[arg(long, visible_alias = "validator_seed_index")]
+    pub validator_seed_index: u32,
 
     /// On-chain beacon index of the validator.
-    #[arg(long, visible_alias = "validator_index")]
-    pub validator_index: u32,
+    #[arg(long, visible_alias = "validator_beacon_index")]
+    pub validator_beacon_index: u32,
 
     /// BLS withdrawal credentials you used when depositing the validator.
     #[arg(long, visible_alias = "bls_withdrawal_credentials")]
@@ -51,6 +51,11 @@ pub struct BlsToExecutionChangeSubcommandOpts {
     /// description
     #[arg(long, visible_alias = "genesis_validators_root")]
     pub genesis_validators_root: Option<String>,
+
+    /// Optional beacon node URL. If set, the bls-to-execution-change message
+    /// will not be printed on stdout, but instead sent to beacon node
+    #[arg(long, visible_alias = "beacon_node_uri")]
+    pub beacon_node_uri: Option<url::Url>,
 }
 
 impl BlsToExecutionChangeSubcommandOpts {
@@ -83,8 +88,8 @@ impl BlsToExecutionChangeSubcommandOpts {
         let (bls_to_execution_change, keypair) =
             bls_to_execution_change::bls_execution_change_from_mnemonic(
                 self.mnemonic.as_bytes(),
-                self.validator_start_index as u64,
-                self.validator_index as u64,
+                self.validator_seed_index as u64,
+                self.validator_beacon_index as u64,
                 self.execution_address.as_str(),
             );
 
@@ -101,10 +106,16 @@ impl BlsToExecutionChangeSubcommandOpts {
             &genesis_validators_root,
         );
 
-        let export = signed_bls_to_execution_change.export();
+        if self.beacon_node_uri.is_some() {
+            signed_bls_to_execution_change
+                .send_beacon_payload(self.beacon_node_uri.clone().unwrap())
+                .unwrap_or_else(|e| panic!("Failed sending beacon node payload: {:?}", e))
+        } else {
+            let export = signed_bls_to_execution_change.export();
 
-        let signed_bls_to_execution_change_json =
-            serde_json::to_string_pretty(&export).expect("could not parse validator export");
-        println!("{}", signed_bls_to_execution_change_json);
+            let signed_bls_to_execution_change_json =
+                serde_json::to_string_pretty(&export).expect("could not parse validator export");
+            println!("{}", signed_bls_to_execution_change_json);
+        }
     }
 }
diff --git a/src/cli/presigned_exit_message.rs b/src/cli/presigned_exit_message.rs
index 275285c..d27b539 100644
--- a/src/cli/presigned_exit_message.rs
+++ b/src/cli/presigned_exit_message.rs
@@ -1,5 +1,6 @@
 use clap::{arg, Parser};
 
+use crate::beacon_node::BeaconNodeExportable;
 use crate::voluntary_exit::operator::SignedVoluntaryExitOperator;
 use crate::{chain_spec::validators_root_and_spec, voluntary_exit};
 
@@ -47,6 +48,11 @@ pub struct PresignedExitMessageSubcommandOpts {
     /// description
     #[arg(long, visible_alias = "genesis_validators_root")]
     pub genesis_validators_root: Option<String>,
+
+    /// Optional beacon node URL. If set, the bls-to-execution-change message
+    /// will not be printed on stdout, but instead sent to beacon node
+    #[arg(long, visible_alias = "beacon_node_uri")]
+    pub beacon_node_uri: Option<url::Url>,
 }
 
 impl PresignedExitMessageSubcommandOpts {
@@ -91,10 +97,16 @@ impl PresignedExitMessageSubcommandOpts {
             &spec,
             &genesis_validators_root,
         );
-        let export = signed_voluntary_exit.export();
 
-        let presigned_exit_message_json =
-            serde_json::to_string_pretty(&export).expect("could not parse validator export");
-        println!("{}", presigned_exit_message_json);
+        if self.beacon_node_uri.is_some() {
+            signed_voluntary_exit
+                .send_beacon_payload(self.beacon_node_uri.clone().unwrap())
+                .unwrap_or_else(|e| panic!("Failed sending beacon node payload: {:?}", e))
+        } else {
+            let export = signed_voluntary_exit.export();
+            let presigned_exit_message_json =
+                serde_json::to_string_pretty(&export).expect("could not parse validator export");
+            println!("{}", presigned_exit_message_json);
+        }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 54e0a61..e61b504 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 #![forbid(unsafe_code)]
+pub(crate) mod beacon_node;
 pub mod bls_to_execution_change;
 pub mod chain_spec;
 pub mod cli;
diff --git a/src/voluntary_exit/operator.rs b/src/voluntary_exit/operator.rs
index 0721159..32362fc 100644
--- a/src/voluntary_exit/operator.rs
+++ b/src/voluntary_exit/operator.rs
@@ -3,23 +3,31 @@ use types::{
     ChainSpec, Domain, ForkName, PublicKey, SignedRoot, SignedVoluntaryExit, VoluntaryExit,
 };
 
-pub(crate) trait SignedVoluntaryExitOperator {
-    fn export(&self) -> serde_json::Value;
+use crate::beacon_node::BeaconNodeExportable;
 
+pub(crate) trait SignedVoluntaryExitOperator {
     fn validate(self, pubkey: &PublicKey, spec: &ChainSpec, genesis_validators_root: &Hash256);
 }
 
-impl SignedVoluntaryExitOperator for SignedVoluntaryExit {
+impl BeaconNodeExportable for SignedVoluntaryExit {
     fn export(&self) -> serde_json::Value {
-        serde_json::json!({
-            "message": {
-                "epoch": self.message.epoch.as_u64(),
-                "validator_index": self.message.validator_index,
-            },
-            "signature": self.signature.to_string()
-        })
+        serde_json::json!([
+            {
+                "message": {
+                    "epoch": self.message.epoch.as_u64(),
+                    "validator_index": self.message.validator_index,
+                },
+                "signature": self.signature.to_string()
+            }
+        ])
     }
 
+    fn beacon_node_path(&self) -> String {
+        "/eth/v1/beacon/pool/voluntary_exits".to_string()
+    }
+}
+
+impl SignedVoluntaryExitOperator for SignedVoluntaryExit {
     fn validate(self, pubkey: &PublicKey, spec: &ChainSpec, genesis_validators_root: &Hash256) {
         let fork_name = spec.fork_name_at_epoch(self.message.epoch);
         let fork_version = match fork_name {
diff --git a/tests/e2e/bls_to_execution_change.rs b/tests/e2e/bls_to_execution_change.rs
index 32f66b2..8f321b3 100644
--- a/tests/e2e/bls_to_execution_change.rs
+++ b/tests/e2e/bls_to_execution_change.rs
@@ -37,9 +37,9 @@ fn test_bls_to_execution_change() -> Result<(), Box<dyn std::error::Error>> {
     cmd.arg("bls-to-execution-change");
     cmd.arg("--chain");
     cmd.arg(chain);
-    cmd.arg("--validator_start_index");
+    cmd.arg("--validator_seed_index");
     cmd.arg(validator_start_index);
-    cmd.arg("--validator_index");
+    cmd.arg("--validator_beacon_index");
     cmd.arg(validator_index);
     cmd.arg("--mnemonic");
     cmd.arg(expected_mnemonic);
@@ -55,8 +55,10 @@ fn test_bls_to_execution_change() -> Result<(), Box<dyn std::error::Error>> {
     let output = &cmd.output()?.stdout;
     let command_output = std::str::from_utf8(output)?;
 
-    let signed_bls_to_execution_change: SignedBlsToExecutionChange =
+    let signed_bls_to_execution_changes: Vec<SignedBlsToExecutionChange> =
         serde_json::from_str(command_output)?;
+    assert_eq!(1, signed_bls_to_execution_changes.len());
+    let signed_bls_to_execution_change = signed_bls_to_execution_changes.first().unwrap();
 
     assert_eq!(100, signed_bls_to_execution_change.message.validator_index);
     assert_eq!(
@@ -86,4 +88,57 @@ fn test_bls_to_execution_change() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 
-// negative test inputs
+#[test]
+fn test_bls_to_execution_change_send_beacon_node() -> Result<(), Box<dyn std::error::Error>> {
+    let server = httpmock::MockServer::start();
+
+    let beacon_node_mock = server.mock(|when, then| {
+        when.method(httpmock::Method::POST)
+            .path("/eth/v1/beacon/pool/bls_to_execution_changes")
+            .json_body(serde_json::json!([
+                {
+                    "message": {
+                        "from_bls_pubkey": "0x958823db41e63bdb54b8445e454f24a592a44faef7bf1161c482c254d36cd2ffb027af3cc87817064c6a09f54acec5a0",
+                        "to_execution_address": "0x71C7656EC7ab88b098defB751B7401B5f6d8976F".to_lowercase(),
+                        "validator_index": "100",
+                    },
+                    "signature": "0xb9e6fcdf66962fbaeec762908e7c986c154ba2274fdfe307603d71c465acda49af98a75aa62743fc59a71e678fccd433164247130c1cede0832a17cc61fc21204ec83c7f8fd76848d6520805939547b4c677fca85f98d1f749c428814fd6a6c5"
+                }
+            ]));
+        then.status(200);
+    });
+
+    let chain = "holesky";
+    let expected_mnemonic = "ski interest capable knee usual ugly duty exercise tattoo subway delay upper bid forget say";
+    let validator_start_index = "0";
+    let validator_index = "100";
+    let execution_address = "0x71C7656EC7ab88b098defB751B7401B5f6d8976F";
+    let bls_withdrawal_credentials =
+        "0x0045b91b2f60b88e7392d49ae1364b55e713d06f30e563f9f99e10994b26221d";
+    // run eth-staking-smith
+    let mut cmd = Command::cargo_bin("eth-staking-smith")?;
+
+    cmd.arg("bls-to-execution-change");
+    cmd.arg("--chain");
+    cmd.arg(chain);
+    cmd.arg("--validator_seed_index");
+    cmd.arg(validator_start_index);
+    cmd.arg("--validator_beacon_index");
+    cmd.arg(validator_index);
+    cmd.arg("--mnemonic");
+    cmd.arg(expected_mnemonic);
+    cmd.arg("--bls_withdrawal_credentials");
+    cmd.arg(bls_withdrawal_credentials);
+    cmd.arg("--execution_address");
+    cmd.arg(execution_address);
+    cmd.arg("--beacon-node-uri");
+    cmd.arg(server.base_url());
+
+    cmd.assert().success();
+
+    // verify request path and body
+
+    beacon_node_mock.assert();
+
+    Ok(())
+}
diff --git a/tests/e2e/presigned_exit_message.rs b/tests/e2e/presigned_exit_message.rs
index d8d1d03..6594ba4 100644
--- a/tests/e2e/presigned_exit_message.rs
+++ b/tests/e2e/presigned_exit_message.rs
@@ -92,7 +92,9 @@ fn test_presigned_exit_message() -> Result<(), Box<dyn std::error::Error>> {
     let output = &cmd.output()?.stdout;
     let command_output = std::str::from_utf8(output)?;
 
-    let signed_voluntary_exit: SignedVoluntaryExit = serde_json::from_str(command_output)?;
+    let signed_voluntary_exits: Vec<SignedVoluntaryExit> = serde_json::from_str(command_output)?;
+    assert_eq!(1, signed_voluntary_exits.len());
+    let signed_voluntary_exit = signed_voluntary_exits.first().unwrap();
 
     assert_eq!(
         signed_voluntary_exit.signature.to_string(),
@@ -101,3 +103,54 @@ fn test_presigned_exit_message() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
+
+#[test]
+fn test_presigned_exit_message_send_beacon_node() -> Result<(), Box<dyn std::error::Error>> {
+    let chain = "mainnet";
+    let expected_mnemonic = "ski interest capable knee usual ugly duty exercise tattoo subway delay upper bid forget say";
+    let validator_start_index = "0";
+    let validator_index = "100";
+    let epoch = "305658";
+
+    let server = httpmock::MockServer::start();
+
+    let beacon_node_mock = server.mock(|when, then| {
+        when.method(httpmock::Method::POST)
+            .path("/eth/v1/beacon/pool/voluntary_exits")
+            .json_body(serde_json::json!([
+                {
+                    "message": {
+                        "epoch": epoch.parse::<u32>().unwrap(),
+                        "validator_index": validator_index.parse::<u32>().unwrap(),
+                    },
+                    "signature": "0xa74f22d26da9934c2a9c783799fb9e7bef49b3d7c3759a0683b52ee5d71516c0ecdbcc47703f11959c5e701a6c47194410bed800217bd4dd0dab1e0587b14551771accd04ff1c78302f9605f44c3894976c5b3537b70cb7ac9dcb5398dc22079"
+                }
+            ]));
+        then.status(200);
+    });
+
+    // run eth-staking-smith
+    let mut cmd = Command::cargo_bin("eth-staking-smith")?;
+
+    cmd.arg("presigned-exit-message");
+    cmd.arg("--chain");
+    cmd.arg(chain);
+    cmd.arg("--validator_seed_index");
+    cmd.arg(validator_start_index);
+    cmd.arg("--validator_beacon_index");
+    cmd.arg(validator_index);
+    cmd.arg("--mnemonic");
+    cmd.arg(expected_mnemonic);
+    cmd.arg("--epoch");
+    cmd.arg(epoch);
+    cmd.arg("--beacon-node-uri");
+    cmd.arg(server.base_url());
+
+    cmd.assert().success();
+
+    // verify request path and body
+
+    beacon_node_mock.assert();
+
+    Ok(())
+}