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x402 Endpoint Search

Official registry Search and web

Search 88k x402 endpoints: price/call, 30-day volume, payee, 402 handshake. Free.

Source code Website Documentation

What can you do with x402 Endpoint Search?

  • Token safety — honeypot/transfer simulation, buy and sell tax, mint and owner privileges on Base ($0.01)
  • Prediction markets — live Polymarket odds, implied probability, board scans ($0.01 / $0.25)
  • Web — search and page reads to markdown
  • Network — DNS, WHOIS, IP, geocoding
  • Markets — crypto prices, currency conversion
  • Utilities — hashing, UUID, timezone, VAT and IBAN validation, regex, cron parsing, distance

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package x402-endpoint-search
Claude Code 
claude mcp add x402-endpoint-search -- npx -y x402-endpoint-search@1.0.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "x402-endpoint-search": {
            "command": "npx",
            "args": [
                "-y",
                "x402-endpoint-search@1.0.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. GadgetHumans Agent API Hub
  2. Free: cross-bazaar x402 discovery
  3. Connect
  4. What you can call
  5. Pricing
  6. Links

GadgetHumans Agent API Hub

216 MCP tools and 209 priced REST routes for AI agents. Pay per call in USDC on Base with x402 — no signup, no API key, free tier on every door.

Endpoint: https://api.gadgethumans.com/mcp (streamable HTTP) Package: gadgethumans-mcp

Free: cross-bazaar x402 discovery

One call searches both live x402 bazaars plus this catalogue, ranked by measured 30-day call volume:

curl "https://api.gadgethumans.com/discovery/search?q=whois&limit=10"
{"jsonrpc":"2.0","id":1,"method":"tools/call",
 "params":{"name":"x402_search","arguments":{"q":"whois","limit":10}}}

Merges facilitator.payai.network (14,841 listings), api.cdp.coinbase.com (73,178 listings) and this catalogue (209 routes), deduped by resource URL. Returns resource, sources, price_usd, calls_30d, payTo and description per row. $0.000, no key, cached 900s, 120 queries/hour/IP.

Use it to compare providers and prices before paying any x402 endpoint.

Connect

npx -y gadgethumans-mcp
{ "mcpServers": { "gadgethumans": { "command": "npx", "args": ["-y", "gadgethumans-mcp"] } } }

What you can call

  • Token safety — honeypot/transfer simulation, buy and sell tax, mint and owner privileges on Base ($0.01)
  • Prediction markets — live Polymarket odds, implied probability, board scans ($0.01 / $0.25)
  • Web — search and page reads to markdown
  • Network — DNS, WHOIS, IP, geocoding
  • Markets — crypto prices, currency conversion
  • Utilities — hashing, UUID, timezone, VAT and IBAN validation, regex, cron parsing, distance

tools/list is served live from the endpoint, so new routes appear without a package update.

Pricing

DoorFreeThen
MCP (/mcp)5 calls/day per IP$0.002/call, x402
REST100 requests/day per IPper-route price, x402
x402_searchalways freerate limited, 120/hour/IP

An unpaid call returns HTTP 402 with an x402 accepts[] challenge (also in the Payment-Required header). Settle and retry with the X-PAYMENT header.

MIT licensed.

Frequently asked questions

What is x402 Endpoint Search?

Search 88k x402 endpoints: price/call, 30-day volume, payee, 402 handshake. Free.

How do I install x402 Endpoint Search?

It runs on your machine. In Claude Code: claude mcp add x402-endpoint-search -- npx -y x402-endpoint-search@1.0.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does x402 Endpoint Search need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is x402 Endpoint Search open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains x402 Endpoint Search?

It is published by gadgethumans-dev. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.