MCP Server Directory

Production-proven Polymarket CLOB V2 trading and data. Fail-closed fills; keys stay local.

Agentry — The Trust Layer for the Agent Economy io.github.cthulhutoo/agentry

Agent registry with Nostr identity, reputation, escrow, observability, and Lightning payments.

MCP server for ECDSA cryptography

JSON Validator API io.github.Br0ski777/json-validator

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

Manage SpherePay customers, bank accounts, wallets, and transfers from Claude.

x402-endpoints io.github.digitalweb33333-creator/x402-endpoints

x402 paid API tools for AI agents on Base: EU/global registries, crypto, wallet & agent trust.

x402-solana io.github.digitalweb33333-creator/x402-solana

x402 paid API tools for AI agents on Solana: crypto safety, market data, KYB/AML verification.

Coal — Payments for AI agents io.github.emmanuel39hanks/coal

Payment rails for AI agents. Pay merchants in USDC on Base. Dual-protocol: x402 + OKX APP.

Stripe-style USDC billing for any API. 8 free demo services no signup. Non-custodial.

Webhook Tester API io.github.Br0ski777/webhook-tester

Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment.

gapup-mcp io.github.getgapup/gapup-mcp

271 agent-payable tools: competitive intel, finance, KYC, compliance, ESG. x402 per-call.

Flori Financial Data API io.github.goosemafia22-rgb/flori-financial-data

SEC EDGAR financials, insider trading, and economic data for AI agents. US GAAP + IFRS.

23 Solana on-chain data tools for AI agents via x402 micropayments + rug-screen token verdict

World Bank & FRED Macro io.github.guptaprakhariitr/world-bank-economic-mcp

Macro indicators from World Bank, FRED, IMF, and OECD via unified query surface.

Validate EU e-invoices (Peppol, XRechnung, Factur-X, UBL, CII) and explain error codes.

OnchainAI io.github.Coinyak/onchainai

Crypto tool MCP: search/trust/install-risk. Remote tools/call is x402 paid.

An MCP server that provides Bitcoin price data from Binance API

Wudao A-Share Stock Data MCP io.github.jcdreamjc/wudao-mcp

China A-share data for AI agents: 57 read-only tools plus 6 tools for your own watchlist.

agent-metering io.github.jdhart81/agent-metering

Usage metering + SLA accounting for agent services (the meter behind x402 micropayments).

MCP server for smart contract ABIs and on-chain data from EVM and Solana via Crypto APIs

Payment gateway for AI agents with tool discovery, provisioning, metering, and reliability tools.

curve-mcp io.github.junct-bot/curve-mcp

Curve - 43 tools for swap quotes, liquidity pools, and trading data

Single MCP server for Belgian public transport, statistics, open data, and geospatial services.

MCP server for the National Bank of Belgium SDMX statistical API (221 dataflows).