"How to test a React app" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
Simulate, test, and analyze cloud architectures without deploying real infrastructure. Cloud World Model enables AI agents to model cloud environments, evaluate architecture behavior and costs, run failure and chaos simulations, and explore infrastructure scenarios across cloud providers.
Moderated usability testing: read sessions, notes, transcripts, reports, and draft test scenarios.
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.
Score any URL against a real design contract — 42 checks, A-F grade, token + motion validation.
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.
Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients.
Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.
Scan GitHub-hosted AI skills for vulnerabilities: prompt injection, malware, OWASP LLM Top 10.
Lint your robots.txt and see which AI crawlers it really blocks. Free, no key, nothing to install.
Agentic code review, no signup to try: reality gates + frontier-model review, with veto.
Hire a real human for real-world verification, product testing, AI output review, and errands.
Production proofs for breaking JSON Schema/MCP changes; UNKNOWN/NO_WITNESS_FOUND not compatible.
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
JSON Schema validation MCP.
A skeptical senior-engineer code reviewer over MCP: risk-scans unified diffs, flags AI-generated-code tells, reports complexity hotspots, scans for leaked secrets, and runs an OWASP security pass — real analyzers, no external APIs. Free tier, no signup.
Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.
