"A simple MCP server or implementation" matching MCP connectors:

Workflow planning, recovery checkpoints, coordination, fixtures, and compatibility tools for agents.

Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.

Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).

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.

Design-system contract verification, scoring, and review tools for AI agents.

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

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.

Read-only, deterministic AI triage and readiness tools implementing Sophon's published rubrics.

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

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.

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.

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

Deterministic recipe verification engine — validates AI-generated recipes against master SOPs.

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

Email compatibility analysis across 15 clients — preview, audit, fix, diff, deliverability.

Verifies web animation vs WCAG 2.2.2/2.3.3: validated specs, deterministic reduced-motion-safe CSS.