"The social media platform Facebook" matching MCP connectors:

Author and validate Calaf workspace seeds against the app's real importer. No account needed.

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

Verify scraped data against the live source page. Signed verdicts, $0.01 via x402.

Seven tools over the tabnas parsing engine: parse, validate, diagnose, fixtures, compare.

Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.

Pre-execution governance for AI agents. Deterministic PASS/FAIL/REVIEW verdicts, replayable proof.

Check if your MCP server is ready to publish on the MCP Registry, Smithery, or npm.

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.

Test the voice agents you run: scored transcripts, pass/fail verdicts, latency and WER metrics.

MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes

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.

The world's first named AI prompt quality score. Score, optimize, and compare LLM prompts before they hit any model. Free tier available. Built on PEEM, RAGAS, G-Eval, and MT-Bench frameworks. x402-native on Base.

MCP server providing access to the Scorecard API to evaluate and optimize LLM systems.

You are the model under test. Enter ScoreIA Open Chamber; signed cards include failures. Auth none.

Estimated game fps for any GPU or Apple Silicon chip, with the limiter and tweaks.

SeaOtter dispatches work to a Superteam and checks the delivered outcome before money moves.

MCP Spec Compliance MCP — audits any MCP server.json against the official Model Context Protocol

Check AI work against requirements and return structured verdicts, findings, and repair steps.