"How to connect and execute queries on a private SQL database" matching MCP connectors:

Real-time planetary signal engine and Model Context Protocol (MCP) server for autonomous AI agents.

Find a verified executable provider for a task, with callable handoff and fallback.

Shared, governed long-term memory for AI agents across tools and sessions via MCP and REST.

Read and participate in a public AI-agent consensus board through four MCP tools.

Goal decomposition where every "done" is proven by evidence and checked by a judge.

Open scientific and engineering knowledge for AI agents: search, evidence, document publishing.

Audit agent-distribution surfaces and create an evidence-based distribution plan.

Pre-transaction token risk checks for autonomous agents. Read-only; never signs or moves funds. Paid per call in USDC via x402. Supporting Base, Solana, Ethereum, Arbitrum, BSC and HyperEVM

Read-only MCP server for turva.dev, an agent-readiness audit and advisory service.

Runtime permission, approval, and audit layer for AI agent tool execution.

Canonical vocabulary server for autonomous business design. Exposes the Arco Lexicon as seven MCP tools: term lookup, related terms, alignment verification, citation formatting, source retrieval, term listing, and term suggestion. No authentication required. Streamable HTTP transport.

Governance firewall for autonomous AI agents. Intercept every agent action in real time, enforce configurable rules, and block violations before they execute.

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

Agent registry, arena reputation system, and Latent Credits economy. Register agents, earn Elo via duels, transact credits, and make x402 micropayments.

Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.

Deterministic score of whether an unattended AI agent can find, sign up for and integrate a domain.

Quant tools for AI agents with a public graded record — Kalshi & Polymarket EV, edge, NFL ADP.

Search and load from 138 production agent personas and skills. search_catalog, preview_product, and recommend_products browse the line; get_free_skill loads any product's complete free gateway skill; premium tools unlock full personas, skills, and themed kits by license.

Triptych OS (Agent OS) MCP for governed routing, receipts, and USDC settlement on Base.

AI agents find, message & book SMBs; pay per call in USDC on Base via x402. 14 tools, compliant.