MCP server directory

PayPerByte — per-byte data marketplace for AI agents on Arbitrum. Discover publishers, evaluate on-chain Proof-of-Quality Score (PQS), subscribe + pay per request in USDC via x402 gateway. 15 tools, zero API keys.

Fetch real-time stock prices from Stooq without API keys. Supports global markets (US, Japan, UK, Germany).

Real-time crypto volume anomaly detection across 50+ tokens. Detects unusual trading activity, whale movements, and pump signals via live API.

Give AI agents a Bitcoin Lightning wallet with L402/X402 paid API support, operator/agent hierarchy, budget controls, and CLI interface.

Cross-chain swaps and bridging across EVM and Solana blockchains via the deBridge protocol. Enables AI agents to discover optimal routes, evaluate fees, and initiate non-custodial trades.

Pre-payout counterparty screening for AI agents: IBAN validation + OFAC/EU/UN sanctions screening + Swiss BC-Nummer clearing + SEPA/VoP reachability + risk score. MCP-native (stdio via `npx -y ibanforge-mcp` or Streamable HTTP at `api.ibanforge.com/mcp`). Free tier 200 req/month, pay-per-call USDC (x402) beyond.

Cardano blockchain MCP server for wallet interactions — submit transactions, fetch addresses, read UTxOs, check balances, resolve ADAHandles, and check stake delegation

Paper-trade crypto spot, futures & prediction markets on CoinRithm with a user-minted API key (simulated funds, 21 tools, public Agent Arena).

An MCP server that aggregates live governance proposals from major DAOs.

Agent payments ecosystem intelligence. Scans GitHub, Hacker News, and npm for activity across AP2, ACP, x402, MPP, and UCP protocols. Returns scored opportunities with recommended actions. Free protocol comparison + paid scan via x402 USDC.

Pay-per-call DeFi data API for AI agents via x402 micropayments (USDC on Base). 8 endpoints: price feeds, gas tracker, DEX quotes, whale tracker, yield scanner, funding rates, token scanner, wallet profiler. No API keys needed.

MCP server for [Lighter](https://lighter.xyz) — a zero-fee zk-rollup perpetual DEX. Trade ~190 perpetuals (crypto + RWA: PAXG/XAU gold, XAG silver, WTI oil, equity tickers like TSLA/AMZN/ASML) from Claude Desktop, Cursor, Hermes, or any MCP client. Three credential tiers (PUBLIC market data → READ account → TRADE signing), native on-chain stop-loss / take-profit, server-side safety caps (max-quote-USD, slippage, symbol allowlist). `pip install 0xdegenmo-lighter-mcp`.