MCP Server Directory

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

Nexus Alpha Geometry io.github.SpearmanMODE/nexus-alpha-geometry

Finance research agent for thesis, trade note, and market-state review.

Read-only payment-boundary preflights plus an unsubmitted public quote-request draft tool.

EP AgentIAM io.github.achilliesbot/ep-agentiam

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

Free invoice generator — create pre-filled invoice URLs with taxes, discounts, and 14 languages.

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.

Official Billium MCP server: manage crypto invoices, payments, and webhooks from any MCP host.

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.

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.

BraFinder io.github.fenrici1/brafinder

Neutral cross-brand bra-size translation and a live in-stock bra catalog by size.

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

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

Route x402 payments, Pyrimid affiliate splits, and referral links. Vendor-neutral, adapter-based.

Word Counter API io.github.Br0ski777/word-counter

Count words, characters, sentences, paragraphs, reading time. x402 micropayment.

Gate Exchange MCP io.github.gateio-dev/gate-exchange

OAuth Gate exchange MCP for CEX trading, account, wallet, unified account, and sub-account.