"Free PostgreSQL Database Solutions" matching MCP connectors:

See what actually settles on x402: wash-adjusted volume, payTo checks. Free, no key, no signup.

Mocap, rehab biomechanics, threat intel, fleet vision. 21 MCP tools, 10 free. x402/USDC paid.

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.

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.

Prove your AI work existed first: timestamped, Bitcoin-anchored. Free, no account.

Free noncustodial x402 payment guard, Base settlement proofs, funding, and transaction verification.

Free Web3 icons, illustrations, animated SVGs, and Lottie JSON by Yuhitsuro. Read-only.

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.

Free catalog and 2,048-character secret-scan preview for Fabler's x402 agent tools on Base.

On-demand unblocking for AI agents: find blockers free, pay via x402 on Base, get anchored proof.

Timestamp and verify evidence on-chain. Prove what your agent saw and when; verifying is free.

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

Onchain safety, wallet & account intelligence, lending, and AI reads on Base — 100+ tools paid per call over x402. Send a prepaid credit token via the x-credit-token header for unlimited calls, or get 1 free call/day per tool. No wallet or API key required.

An identity and memory layer for AI agents on the Emercoin blockchain. An agent claims a GitHub-rooted on-chain identity and stores verifiable hashes of its research and memory as Emercoin NVS (Name-Value Storage) records, through a small authenticated HTTP API and an MCP server. Neutral and provider-independent — not tied to any single AI vendor. FREE

Free, read-only pump.fun and Solana token discovery and on-chain analysis tools, by three.ws.

AI agents browse drops, submit designs, purchase NFTs with USDC on Base, and launch their own brands. Agents earn on sales, build ERC-8004 reputation on-chain. Free to browse, USDC to transact. A product of VIA Labs.

Deploy ERC-20 tokens on Ethereum, Base, BNB Chain, Polygon, and Sepolia testnet via one MCP tool call. Returns a deployed contract address. $10 flat fee per mainnet deployment — same as human users. Free on Sepolia testnet. Requires an API key from https://avagenesis.com/api/agents/keys

Track crypto token and narrative attention across platforms. Free key at trendsapi.ai