diff --git a/docs-src/src/collections.md b/docs-src/src/collections.md
index 88c0203c..267a353a 100644
--- a/docs-src/src/collections.md
+++ b/docs-src/src/collections.md
@@ -1,6 +1,6 @@
-## Collections
+# Collections
 
-### Migrate
+## Migrate
 
 Migrate a collection of NFTs to be part of a single on-chain Metaplex Certified Collection (MCC).
 
@@ -94,12 +94,34 @@ Use `--output-file` or `-o` to specify the path and name of the JSON file to wri
 
 e.g.:
 
-```
+```bash
 metaboss collections migrate -L devnet_test_mints.json -m 9wtpdjMysSphxipTSJi7pYWGzSZFm2PRFtQucJiiXUzq -o ~/Desktop/my-cache3.json
 ```
 
 This will override both the default cache file name ('mb-cache-migrate.json') and the cache file name passed in with `--cache-file`.
 
+## Get and Check Collection Items
+
+### Get-Items
+
+Metaboss now has experimental support for getting all collection items from a given mint using off-chain, indexed data from https://theindex.io/. Other indexers or methods may be supported later. To use this feature, you need to sign up for a free account with TheIndex to get an API key.
+
+```bash
+metaboss collections get-items --collection-mint <COLLECTION_NFT_MINT_ADDRESS> --api-key <THE_INDEX_API_KEY>
+```
+where `--collection_mint` is the mint account of the parent collection NFT and `--api-key` is your API Key from theindex.io. There's an additional command `--method` which can be used to support other indexers in the future but defaults to theindex.io for now so can be elided.
+
+This command creates a JSON file named `<COLLECTION_MINT>_collection_items.json` in the directory it is run in. 
+
+### Check-Items
+
+Given a list of mint addresses and a collection mint address, this command checks all the items in the list to see if they belong to the specified collection. 
+
+```bash
+metaboss collections check-items --collection-mint <COLLECTION_NFT_MINT_ADDRESS> -L <PATH_TO_MINT_LIST>
+```
+
+This command has a `--debug` flag, which creates a JSON file when set with a mapping of all collection NFTs found associated with the list of addresses and which ones belong to each.
 
 
 Report bugs and questions to the [Metaboss Discord](https://discord.gg/2f7N25NJkg).
diff --git a/src/collections/data.rs b/src/collections/data.rs
index 67dd5069..066208de 100644
--- a/src/collections/data.rs
+++ b/src/collections/data.rs
@@ -93,7 +93,7 @@ impl FromStr for GetCollectionItemsMethods {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         match s {
-            "the_indexer" => Ok(GetCollectionItemsMethods::TheIndexIO),
+            "the_index_io" => Ok(GetCollectionItemsMethods::TheIndexIO),
             _ => Err(format!("Invalid method: {}", s)),
         }
     }
diff --git a/src/collections/methods.rs b/src/collections/methods.rs
index 4b1a4595..1abe4a62 100644
--- a/src/collections/methods.rs
+++ b/src/collections/methods.rs
@@ -439,7 +439,7 @@ pub async fn get_collection_items_by_the_index_io(
         .map(|nft| nft.metadata.mint.clone())
         .collect();
 
-    let file_name = format!("{collection_mint}-collection_items.json");
+    let file_name = format!("{collection_mint}_collection_items.json");
     let f = File::create(&file_name).unwrap();
     serde_json::to_writer_pretty(f, &mints).unwrap();
     println!("Data written to {file_name}");
diff --git a/src/opt.rs b/src/opt.rs
index 1941d517..f32d3d9c 100644
--- a/src/opt.rs
+++ b/src/opt.rs
@@ -319,7 +319,7 @@ pub enum CollectionsSubcommands {
         collection_mint: String,
 
         /// Method to use for getting collection items. See docs.
-        #[structopt(short, long, default_value = "the_indexer")]
+        #[structopt(short, long, default_value = "the_index_io")]
         method: GetCollectionItemsMethods,
 
         /// API Key for an indexer, if used.