"How to Connect to a PostgreSQL Server" matching MCP connectors:
Matching Connector Tools:
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.
Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev
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.
Hire a real human for real-world verification, product testing, AI output review, and errands.
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
Promotion gate for AI agents: leakage audits, exact-statistics verdicts, and a live report card.
Pay-per-call AI evaluation MCP server. Score LLM outputs against benchmark rubrics via Workers AI.
Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.
Read-only MCP server for the OPERANT AI operating-agent calibration benchmark.
MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes
A flock of AI users tests your deployed app and reports where real people get stuck, with fixes.
Adversarial behavioural-bias engine — audits your decisions for cognitive biases via your own AI.
PQS scores any prompt before the model runs. 8 dimensions. 5 frameworks. Pre-flight, not post-hoc.
Pay-per-call MCP server. Vetted human experts review AI-generated content (text, images, video, audio, social posts), audit reasoning chains, run prepublish safety checks, and gate high-stakes actions for human approval. 7 paid tools at $1.00 each plus 4 free tools (list_offerings, list_expert_profiles, get_result, verify_certificate). Payment via x402, USDC on Base mainnet. Approved outputs receive an on-chain Taste content certificate downstream agents verify before consuming.
MCP-native AI browser testing for coding agents. Submit a URL + goal, get back action trail, bugs, screenshots, and WebM video your agent patches from directly. 43 tools, 12 AI evaluation personalities, combo tiers with auto-pause-on-bugs, throwaway email + SMS inboxes.
MCP server for e-mail testing: create disposable inboxes, wait for delivery, and extract e-mail content or links - all from your AI agent or test automation workflow. Get a free API key on https://app.zyntra.app/
MCP server: NEED + YIELD + CLEAN-MONEY gates with EIP-3009 attestations · Hive Civilization
Validate up to 75,000 URLs per job (status, redirects, response times). OAuth 2.1.
Benchmark-first release surface with a read-only MCP endpoint and operator CLI.