x402-services
9 pay-per-call x402 APIs on Base mainnet, 22 tools, TypeScript, stdio transport, Built by Jebadiah
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Documentation
x402 Agent Kit
Integration materials for calling nine pay-per-call data APIs for AI agents — no API keys, no signup, USDC on Base via the x402 protocol. By Jebadiah.
quickstart.md— the x402 payment flow in 3 steps, with a verified Python example and TypeScript one-lineropenai-functions.json— 22 OpenAI function-calling tool definitions (one per priced endpoint)mcp-manifest.json— MCP-style tool manifest with x402 annotationslangchain-tools.py— LangChain@toolwrappers with automatic 402 handlingx402-services/SKILL.md— Claude Code skill: drop this folder into your skills directory
MCP server — run from source (no npm needed)
mcp-server/ is a stdio MCP server exposing all nine services
as 22 MCP tools, with automatic x402 payment handling. There is no npm
release yet, so run it straight from this repo:
git clone https://github.com/samgouffsm-crypto/x402-agent-kit
cd x402-agent-kit/mcp-server
npm install && npm run build
Point your MCP client at it:
{
"mcpServers": {
"x402-services": {
"command": "node",
"args": ["<repo>/mcp-server/dist/index.js"],
"env": { "X402_PRIVATE_KEY": "0xYOUR_KEY" }
}
}
}
Fund your own Base wallet with a little USDC; the key only ever signs gasless
EIP-3009 authorizations on your machine. Full setup in
mcp-server/README.md.
The services
| Service | Endpoint | Price |
|---|---|---|
| TenderWatch — gov procurement search + fit-scoring | https://x402-tenderwatch.onrender.com | $0.01–$0.02/call |
| EDGAR Lens — SEC filing search/extraction | https://x402-edgar-lens.onrender.com | $0.02–$0.05/call |
| TrialScope — clinical trial search/deltas | https://x402-trialscope.onrender.com | $0.01–$0.02/call |
| DocExtract — PDF → structured JSON | https://x402-docextract.onrender.com | ≤$0.10/doc |
| PatentScope — patent search/prior-art | https://x402-patentscope.onrender.com | $0.02–$0.05/call |
| Alexandria — auto parts intelligence | https://x402-alexandria.onrender.com | $0.02–$0.05/call |
| InvoiceIQ — AP invoice extraction | https://x402-invoiceiq.onrender.com | $0.05/doc |
| TaxRate US — state sales-tax rate + nexus | https://x402-taxrate.onrender.com | $0.03 ($0.01 nexus) |
| EntityVerify — business verification | https://x402-entityverify.onrender.com | $0.07/check |
Each service also serves /llms.txt, /openapi.json, and /.well-known/x402.