"A coding assistant that references online package documentation when writing code" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
GodPrompt MCP + Agent Skill for coding agents with TDD, debugging, verification, and task routing.
Zero-config agent-readiness auditor and Flight Simulator tools for AI coding agents
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.
Drive real Android & iOS devices and web browsers from natural language for mobile + web QA. 290+ 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.
A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.
UI Verify is visual regression testing built for coding agents. Connect the MCP server and your agent (Claude Code, Cursor, Codex) pulls a pull request's UI changes into the conversation, views each visual diff, reads the AI judge's verdict of regression vs intended change, and accepts the intended baselines - all over MCP.
Give AI assistants the context behind client website feedback. Read comments, screenshots, replies, element details, and developer briefs; organize priorities, update statuses, and export feedback from authorized projects. Coding agents with repository access can investigate issues and prepare fixes for review. Connect through Streamable HTTP and browser OAuth using a Simple Commenter account.
Audit and build email signatures that survive Gmail, Outlook desktop and Apple Mail.
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
Score any URL against a real design contract — 42 checks, A-F grade, token + motion validation.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
Runs your code against a contract; HELD or BROKE at the exact input. Deterministic. 0.10 USDC/call.
What is known to be broken in an MCP server or API operation, with the check that found it.
A deterministic verification engine for agents. Proves a fix: fails on the old code, passes on new.
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.
Explore Upforge services and evidence, or submit a prototype for a human-approved static fit check.
Test an email before it goes out: a disposable address, 41 checks with RFC citations, a fix plan.
Whether a registry MCP server works for a stock client, and what changed in its tools. Free, no key.
Pay per call via HTTP 402: 5 site audits + a statistics engine as MCP tools, 38 /work jobs, receipts
Machine-readable taxonomy of 100+ AI system failure modes spanning factuality, alignment, planning, code generation, and instruction following.
