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x402 MCP Registry — 53 Pay-per-Call Tools for AI Agents

Free, self-hosted MCP server registry. 53 security and enrichment tools that AI agents pay for via HTTP 402 + USDC on Base mainnet. No API keys, no signup. First call free.

Quick Connect

json { "mcpServers": { "x402-registry": { "type": "sse", "url": "https://etherealgoodsco.store/mcp/sse" } } }

Paste into Claude Desktop, Cursor, or Windsurf. 53 tools auto-discover.

Products

Category

Tools

Price Range

Security

Contract audit, CVE lookup, URL scan, cert hunt, domain age, email breach, password strength, header audit

$0.01–$0.25

Crypto/DeFi

Token snapshot, tx verify, gas oracle, ENS resolve, LP check, deployer history, price feed, top tokens

$0.01–$0.10

Enrichment

DNS bundle, IP geo, WHOIS, DNSBL, SSL cert, HTTP status, reverse IP, subdomain scan, port scan, tech stack detect

$0.01–$0.10

Bundles

DeFi scan, threat profile, crypto intel, web audit, full diligence

$0.25–$2.00

Tools

URL expand, email validate, timezone, language detect, hash ID, base64 codec

$0.01–$0.05

How It Works

  1. Agent sends request → Server returns HTTP 402 Payment Required

  2. Agent signs USDC transfer on Base mainnet → CDP facilitator settles

  3. Agent retries with payment proof → Server returns data (200)

Full API docs: https://etherealgoodsco.store/docs

Stack

  • FastAPI + Coinbase x402 Python SDK

  • CDP facilitator (EdDSA JWT auth)

  • Base mainnet (eip155:8453)

  • Caddy + Let's Encrypt (auto-TLS)

  • 53 MCP tools via SSE transport

  • Free trial auto-seeding, volume discount ladder, response cache, rate limiter

Discovery

F
license - not found
-
quality - not tested
C
maintenance

Maintenance

Maintainers
Response time
Release cycle
Releases (12mo)
Commit activity

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