"Wikipedia - The Free Online Encyclopedia" matching MCP connectors:

The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.

Identity infrastructure for the AI economy. Confirms if someone is known; returns inferred traits.

Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.

Teardrop is the native economic layer for AI agents, providing a robust suite of tools for multi-chain portfolio tracking, DeFi yield analysis, and gas estimation. It enables autonomous agents to securely find Web3 data and manage micro-payments on-chain with zero human intervention.

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

Real-time financial intelligence MCP server for crypto public companies. Provides covenant stress analysis, alpha signals, peer ranking, risk distribution, SEC XBRL fundamentals, and daily changes. x402 micropayments on Base USDC. First 5 calls free.

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required -- just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on Cloudflare's global edge network via Streamable HTTP. All tools are strictly read-only and stateless.

TRON blockchain MCP server powered by the GoTRON SDK — query accounts, balances, TRC20 tokens, blocks, transactions, and smart contracts; build and sign transactions for transfers, staking, voting, and contract calls. Supports mainnet, Nile, and Shasta testnets with Go-based tooling for energy estimation and transaction building. Available via stdio or hosted Streamable HTTP

Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.

AI-agent verifier: verdict committed before the outcome graded against it; /review, /ledger.

Agent MCP for DeFi: cross-chain LINQ fan-out, AMM quotes/swaps, bridge, AI. Solana+EVM. Free+x402.

Verify your agent's x402 payment flow for free on Base Sepolia testnet before real money moves.

9 pay-per-call company intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).

Monero/Zcash payment webhooks + DeFi liquidation & Ethereum builder data over MCP. Free tier; x402.

Free daily AI crypto research verdicts: graded stance, dimensions, and key levels for 67+ coins.

Find the cheapest EVM chain across up to 9 networks with savings %. Pay-per-call via x402 on Base.

14 pay-per-call market data tools over MCP. Free discovery, calls settle in USDC on Base (x402).

The only x402 MCP server for Robinhood Chain (chainId 4663) - 147 onchain, trading & AI tools.

Read-only MCP server: verify credentials and browse escrows on the Stellar testnet contract.