"An open-source relational database management system" matching MCP connectors:

The Apiosk MCP lets AI agents discover, pay for, execute, and publish APIs through the Apiosk gateway. It is a machine endpoint, not a website, so connect it from an MCP client (Claude, Cursor, ChatGPT, and others) rather than browsing it here.

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.

Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.

ifsc-in MCP — Indian bank branch IFSC code lookup via Razorpay's open

OpenIBAN MCP — validate an IBAN's checksum + bank code and resolve the

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Pre-signature x402 payment-risk oracle. AI agents call forecast_payment before paying a counterparty and get a GO / HOLD / STOP verdict from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions screening — plus a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; returns an x402 payment challenge over that.

Buy any of 24,000+ live x402 services with USDC on Base — the open marketplace for the agent economy.

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