Developer Tools MCP servers

Create, validate and audit llms.txt, incl. the Lighthouse Agentic Browsing check.

Yappy macOS docs (yappy.biz): setup, permissions, LLM backends, troubleshooting.

Read AFMR failure modes and discover scoped attestation and lift-evidence contracts.

Format/lint JS, Python, HubL for automation platforms. Tools: format_code, format_json, ask_codefmt

Diagnose x402 seller endpoints: what is wrong with your 402 challenge, and how to fix it.

Proves AI-generated Python does what you asked: lint, types, security, sandbox run, exact fixes.

Search 41,000+ agent skills, MCP servers, plugins & loops — real install counts and stars.

Generate MantleKit setup plans and launch-ready SaaS blueprints from a product idea.

SpecProof: Search standards specs with MCP-ready precision.

Official Microsoft Learn MCP Server – real-time, trusted docs & code samples for AI and LLMs.

HefestoAI checks AI-generated code before you ship it.

Find llms.txt, docs, MCP servers, skills and CLIs for a tech stack, for coding agents.

Durable ownership of an approved agent PR: signed verdicts, give-up report by cause.

SQL validation, formatting, parsing, metadata extraction, linting, and security analysis.

Sourced directory of real apps built with AI coding tools, plus build tools, harnesses, what is new.

Surface contracts: API behavior evidence, x402 pre-payment check, MCP server preflight

Verified component catalog over remote MCP: agents pick ids and get a project that builds.

History-seeded rewrite-regression verdicts, signed per class.

Open model files with recorded SHA-256 and licence labels. Ask for what's missing.

AI coding plan limits (Claude Code, Codex, Cursor, Copilot): router, picker, status, budget check

The docs, rules, blocks, charts and design tokens of nuvui, a React UI library, for coding agents.

Agentic AI quality engineering: run, debug and triage tests on real browsers and devices

Verified, version-pinned records of new dependency bugs: look an error up before searching the web.

Apple developer docs and WWDC transcripts with RAG retrieval and Jev relevance ranking.

Markdown to editable PowerPoint, Word, PDF; checks, edits and previews RDLC/RDL reports.

Read-only search of 900+ reviewed developer tools, each with a verdict and caveats. Free/OSS first.

Benchmark your own prompt on 100+ LLMs with real API calls; pick the cheapest model that passes.

50-vector prompt-injection, llms.txt poisoning, SSRF & OpenAPI scanner ($1 USDC).