"Using PostgreSQL with n8n Workflow Automation" matching MCP connectors:

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

Drive real Android & iOS devices and web browsers from natural language for mobile + web QA. 145+ tools across device control, app management, automation sessions, browser automation, and flow recording / replay. Bearer-auth — get a token at robotactions.com → Profile → API Tokens.

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

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.

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

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

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

A flock of AI users tests your deployed app and reports where real people get stuck, with fixes.

Benchmark-first release surface with a read-only MCP endpoint and operator CLI.

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: NEED + YIELD + CLEAN-MONEY gates with EIP-3009 attestations · Hive Civilization

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links. 34 tools; bearer auth with an mfx_ API key (free tier).

Rule engine with built-in simulation. 55 MCP tools for complete business rule lifecycle management.

295k+ bug-fix patterns with MCP Hub proxy, PII filtering, and code search

Browser-backed QA with evidence and fix-ready reports for coding agents.

Capture screenshots, detect visual regressions between page versions, and analyze with AI.

Run, debug, and triage tests via natural language across HyperExecute, Automation, SmartUI, and Accessibility on the TestMu AI cloud.

Control real Android and iOS devices with LLM agents — tap, swipe, type, automate flows.