"Free PostgreSQL Database Solutions" matching MCP connectors:
Matching Connector Tools:
Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.
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.
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.
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.
Live crypto data: funding rates, funding arbitrage, OI pressure, Fear & Greed. Free, no API key.
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.
The trust layer of the x402 economy: free conformance checks, attestation, corpus, agent store.
Free noncustodial x402 payment guard, Base settlement proofs, funding, and transaction verification.
Free crypto futures data: open interest, funding, long/short, liquidations, volume. No API key.
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.
33 pay-per-call market and news data tools over MCP with free discovery and x402 payments.
Check a Base contract, transaction or web page before you act. Free pricing, paid per call in USDC.
Monero/Zcash payment webhooks + DeFi liquidation & Ethereum builder data over MCP. Free tier; x402.
Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.
Verify your agent's x402 payment flow for free on Base Sepolia testnet before real money moves.
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).
9 pay-per-call company intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).
Free daily AI crypto research verdicts: graded stance, dimensions, and key levels for 67+ coins.