MCP Server Directory

Discover, quote, verify & self-check 56 x402 pay-per-call finance/tax calculators for AI agents.

AI services via Bitcoin Lightning — PDF summarisation, code review, translation and more.

CausalLayer MCP io.github.smq9sn5jck-coder/causallayer

Deterministic AI liability attribution with Bitcoin-anchored proof certificates.

EP AgentIAM io.github.achilliesbot/ep-agentiam

AI agent execution safety via x402 micropayments: risk scoring, integrity, memory checks

Fakturai — German E-Invoice (ZUGFeRD / Factur-X / E-Rechnung) de.fakturai/erechnung

KoSIT-verified German e-invoices: generate & validate ZUGFeRD, Factur-X, XRechnung, EN 16931.

payqr dev.cz-agents/payqr

European payment QR — SPAYD (CZ/SK) & EPC/GiroCode (SEPA), plus text/WiFi/vCard. Local, free.

signaldaemon io.github.bevanding/signaldaemon

Narrative & signal intelligence for AI agents: crypto/AI/macro convergence & divergence.

Sats4AI - Bitcoin-Powered AI Tools io.github.cnghockey/sats4ai

40+ Lightning-paid AI tools for agents: calls, SMS, fax, voice, translation. No signup, no keys.

49 Bitcoin tools for AI agents: fees, mempool, blocks, mining, price. Zero config.

MCP server for NuPay — Nubank merchant checkout: Pix + wallet one-click for 100M+ BR users

Siigo — Colombian accounting + DIAN e-invoicing

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

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

Vietnam stock MCP: TA signals, Z/F/M scores, foreign flow, whale detection. 2000+ VN stocks.

MCP server exposing cryptography library functionality

An MCP server that exposes the python-bitcoinlib API

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

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

clawmerchants-mcp-gateway io.github.danielxri/clawmerchants-mcp-gateway

MCP Gateway: wrap any MCP server with cold-start retries, uptime SLA, and per-execution MPP billing.

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

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

Shopify Catalog Monitor io.github.dizzyvinci/shopify-catalog-monitor

Track price drops, stock-outs, restocks, and new/removed products across Shopify stores.

QR Code Generator API io.github.Br0ski777/qr-code

Generate QR codes from text or URLs. Returns base64 PNG. x402 micropayment.

Regex Tester API io.github.Br0ski777/regex-generator

Test, validate and explain regular expressions with match highlighting. x402 micropayment.

Crypto data & trading MCP with 43 tools: prices, DeFi, NFTs, Solana swaps. 11 tools free.

Timezone Converter API io.github.Br0ski777/timezone-converter

Convert datetime between timezones. List all IANA zones. x402 micropayment.

Wallet Portfolio Tracker API io.github.Br0ski777/wallet-portfolio

Crypto wallet balances, ERC-20 tokens, USD values across Base and Ethereum. x402.