"A server to interact with an SQL database with insert operation support (LiteSQL, DuckDB, Postgres)" matching MCP connectors:

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.

Agentic code review, no signup to try: reality gates + frontier-model review, with veto.

Real-browser WCAG audit that also finds keyboard-inoperable controls axe-core misses, with fixes.

Can an AI shopping agent find, understand and BUY on a store? Deterministic e-commerce audit /100.

Find MCP servers and check whether they actually respond, via live handshake probes.

A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.

Voice-powered bug reporting with 13 MCP tools. Record bugs by talking; let AI find and fix them.

Give AI coding agents access to your Vynix visual feedback, bug reports, and AI diagnosis.

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

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

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

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

Hire a real human for real-world verification, product testing, AI output review, and errands.

Promotion gate for AI agents: leakage audits, exact-statistics verdicts, and a live report card.

Scores any MCP server before you trust it: free quick check, full paid report, 2-5 way compare.

Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.

Generate realistic relational test data — 156 field types, 22 locales, JSON/CSV/SQL, free previews.

Read-only MCP server for the OPERANT AI operating-agent calibration benchmark.