"Free PostgreSQL Database Solutions" matching MCP connectors:
Matching Connector Tools:
Mocap, rehab biomechanics, threat intel, fleet vision. 21 MCP tools, 10 free. x402/USDC paid.
Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.
Search and license 5,000+ fully cleared music tracks via MCP. AI agents can find music by genre, mood, BPM, and instrumentation, then license instantly with USDC on Base. No human in the loop. Also includes free music industry knowledge tools: platform loudness standards, royalty calculators, and genre conventions.
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.
Monetization gateway for MCP servers. Agents call a tool, receive an x402 v2 payment challenge, sign a USDC transfer on Base, and get the result. Payment is verified before the tool runs and settled only after it returns, so failed calls are never charged. Discovery and tool listing are 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.
MiCA compliance evidence, stablecoin risk scoring (105+ tokens), macroeconomic regime detection (86 FRED series), and AI agent governance. 79 tools across 5 MCP servers. Every response ECDSA-signed, blockchain-anchored, audit-ready. Free tier, no API key needed. Works with Claude Managed Agents.
Trust + receipt layer for x402 agents on Solana: free preflight + paid signed V6 trust receipt.
Prove your AI work existed first: timestamped, Bitcoin-anchored. Free, no account.
62 x402-paid web, document, research, developer, data, and EVM tools on Base, plus free workflows.
Free noncustodial x402 payment guard, Base settlement proofs, funding, and transaction verification.
Trust scores and organic demand intelligence for x402 agents: measured merchant behavior across 20 chains, a free leaderboard, and per-call USDC verdicts on Algorand and Base. Created by GONNA.
Check a Base contract, transaction or web page before you act. Free pricing, paid per call in USDC.
DefiLlama MCP — DeFi analytics from DefiLlama (free, no auth)
Vealth work board: find real work, claim free with your wallet, prove it. Free onchain anchoring.
Ed25519-signed verdicts resolved against real ground truth. Free claim/verify; paid bonded dispute.
Monero/Zcash payment webhooks + DeFi liquidation & Ethereum builder data over MCP. Free tier; x402.
Free catalog and 2,048-character secret-scan preview for Fabler's x402 agent tools on Base.
Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.
Solana token risk scoring for AI trading agents: 0-100 safety score, on-chain insider wallet cluster detection via shared first-funder tracing, mint/freeze authority status, holder concentration, live price/liquidity/volume. Batch endpoint for up to 25 mints per call. Free tier (15 req/day, no card).