agent-payments

Vaaya MCP server — pay-per-call agent superpowers: media & video generation, product demo videos, web search & scraping, deep/market research, GTM & sales enrichment, code sandboxes, browser automation, email, memory. No API keys.

Virtual MasterCards for AI agents - pay with USDC via x402 on Stellar

Agent402: 500+ pay-per-call tools for AI agents over x402 + MPP (USDC on 12 rails, native Tempo, free via PoW, or prepaid card credits), cited reports + monitors people buy by card, the open x402 + MPP index, Smart Order Router, on-chain leaderboard, and the tollbooth. Open source, self-hostable, MCP-native. The applied layer of agentic finance.

Starter SDK for building MCP tools that require payment before they run. definePaidTool + enforcePayment + runPaidTool. Maintained by Harpd (harpd.com).

Canonical, protocol-agnostic audit record for agent payments. Normalizes x402/MPP/AP2 into one schema and validates it. Maintained by Harpd (harpd.com).

Harpd x402 V2 observability + budget-control SDK for agent payments — the 4 lifecycle hooks, above any Facilitator. Maintained by Harpd (harpd.com).

Local, synchronous budget control SDK for agent payments. Declare per-call/agent/endpoint/tool caps and evaluate them before a payment is sent. Maintained by Harpd (harpd.com).

Give an AI agent a real Solana wallet without giving it your money. An MCP server for spending allowances the SPL Token program enforces on-chain, with guardrails, x402 payments, and revocable custody.

Drop-in x402 payment logging middleware for Node HTTP / Express. Structured, audit-friendly logs for every x402 interaction. Maintained by Harpd (harpd.com).

MCP server for 402 Index: discover 15,000+ paid API endpoints across L402, x402, and MPP

MCP server for Gate402 — pay-per-call agent APIs over x402/USDC: rent GPU/CPU compute (per-second), open-model LLM inference (Llama 3.1, Qwen, Mistral), a full Base trading loop (discover → vet → read → execute), and web→Markdown scraping. 20 tools, free tier, no signup.

MCP bridge for Hermes Plant action safety, spend assurance, signed evidence, and deterministic x402 APIs.

MCP server exposing 9 anchor-x402 services as agent tools. Pay-per-call USDC via x402 on Base mainnet. Works with Claude Desktop / Claude Code / Cursor / any MCP client.

Open plugin marketplace primitive for x402. Drop a JS file, agent hot-reloads it as a paid HTTP endpoint in 400ms. Bazaar-discovery compliant.

MCP marketplace + non-custodial USDC <-> bank ramp for AI agents. Pay-per-call with x402; agents discover, pay and cash out with no accounts or API keys. npm: fiatdock-mcp

Web search for AI agents — MCP server with web_search, news_search, and scrape (read any page as markdown). The agent pays per call in USDC via x402: no API key, no signup. Powered by Superhighway.

Open safety fixtures and checks for x402/MPP-style agent payments

Pay-per-use APIs for OpenClaw with automatic MPP HTTP 402 payments and capped Tempo Wallet access keys.

22 x402 pay-per-call utility tools for AI agents — scrape, validate, embed, store, moderate, notify, convert, prevent loops. No accounts, no API keys. USDC on Base via the x402 protocol.