422 MCP servers and agent skills in the Developer Tools category, ranked by quality score.
The official MCP server for PNTR free dev subdomains — register a `*.pntr.dev` subdomain, manage its DNS records, receive email on a disposable inbox, and capture inbound HTTP requests for webhook debugging. Free tier, no key needed to start. Local stdio via `npx @pntr/cli` or hosted endpoint (`https://api.pntr.dev/mcp`, OAuth).
Deterministic axe-core accessibility scanning (WCAG 2.1 AA, EN 301 549, PDF/UA) through a [wcagc](https://wcagc.com) account: scan any public URL or PDF, crawl a whole registered site, replay saved multi-step journeys, and read violation trends. Returns structured findings — rule, severity counts and the success criteria involved — so the assistant reasons over real results rather than guessing fr
Android MCP server for AI-assisted Android development. Build APKs, launch emulators, manage devices, automate UI, and analyze logs through natural conversation.
Self-hosted MCP for live docs, code audits, snippets, and best practices across 445+ libraries. 14 tools, 107 audit patterns with file:line precision, BM25-ranked snippets, lockfile-aware version pinning, npm/PyPI/crates.io/Go fallback. No API keys, no rate limits, Context7 alternative. `npx -y @groundtruth-mcp/gt-mcp`
Search, extract sections, list headings, and find code blocks across markdown files.
Web scraping — extract clean markdown, links, and metadata from any URL. Free Firecrawl alternative.
Universal persistent project context for Cursor, Windsurf, Cline, VS Code, and all MCP-compatible platforms (including Claude Desktop). IANA-registered format (application/vnd.faf+yaml). 17 native tools, AI-readiness scoring.
Plug-and-play MCP server toolkit with semantic code search, natural language database queries, docs indexing, and OpenAPI introspection. One-command setup for Claude Code, Cursor, and Windsurf.
Web Validator by DigestSEO validates HTML and CSS, audits technical SEO and accessibility signals, checks JSON-LD and bounded public links, and captures responsive screenshots. Install locally with `npx -y mcp-web-validator`; no API keys required.
Companion Gallery for Codex: public read-only registry for Codex-compatible animated companion packs. Search, preview, install community pets, generate badges/embed cards, and discover the request flow via Streamable HTTP MCP.
Domain-specific fine-tuning of open-source LLMs and SLMs with zero infrastructure. Specialized tuning agents deliver sovereign models trained on your data. Supports Qwen, Llama, DeepSeek, Mistral, Gemma 1B-72B. LoRA, QLoRA, full fine-tuning. Cost estimation, model management, S3 export.
Local-first MCP server for AI content governance — 13 tools for model/content CRUD, validation, normalization, and i18n across any framework.
Local-first MCP safety and verification layer for AI coding agents with workspace confinement, command allowlists, scope-violation detection, and auditable task evidence. Install: `npx -y patchwarden@0.6.1`.
GitHub Actions — view workflow runs, read logs, re-run failed jobs, and manage CI/CD.
Prose linter + AI-slop detector: weasel words, passive voice, hedging, and 190+ research-cited AI tells. Remote server at wsc.theserverless.dev/mcp or `npx wsc-mcp`.
Deterministic guardrail for AI-written diffs, runnable from inside the coding agent's own loop over MCP. Zero-LLM-token, AST-precise rules (SQLi, SSRF, XXE, permissive CORS, prototype pollution, hardcoded secrets) across 8 languages, plus structural checks for reinvented helpers and over-abstraction — findings scoped to only the changed lines, same input always gives the same output, no false-bloc
Agency-grade MCP server for WordPress Elementor — multi-site management for 120+ WordPress sites with safe edits (backup + auto-rollback + post-write verification), template export/import, global widget detection, CSS flush, WP-CLI escape hatch, headless Chrome screenshots. 34 tools across pages, widgets, templates, bulk find/replace, and fleet operations.
MCP server for Chrome Web Store extension management — 8 tools for upload, publish, status, staged rollout, and metadata updates.
Developer-focused MCP server for code analysis, JSON repair, encoding fixes, and import organization across local projects.
Bug-report triage and fix-dispatch MCP for vibe coders. Ask your AI coding agent for a plain-English diagnosis of any user-reported bug — with evidence, blast radius, and a paste-ready fix prompt — then dispatch an automated GitHub fix PR without a second LLM key. 80+ tools, Supabase-backed, MIT SDK. `npx @mushi-mushi/mcp`
An open-source observability layer for AI coding. Silently tracks dev tokens/time and auto-codifies AI deviations into persistent project rules.
Checks whether a project idea already exists before your agent scaffolds it. Searches GitHub, npm and Python repos, drops archived/inactive results, and returns at most 3 maintained alternatives with a concrete "extend this instead" suggestion for each. The calling agent does the relevance judgement itself, so no extra API key is needed. `npx -y reuse-before-generate`
EOQ-based context economics for coding agents. Monitors LLM token cache with inventory theory, signals optimal session restart timing via live dashboard and terminal statusline. Zero context pollution — no metric ever enters the model's context.
CI for [ink](https://github.com/inkle/ink) interactive-fiction stories. Compiles, exhaustively playtests every branch, and finds runtime errors (with a repro path), unreachable knots, and every distinct ending — so an agent can verify the story it wrote. Writes no prose. `claude mcp add inkcheck -- npx -y inkcheck mcp`
Reliable async execution for agent tool calls: schema-gate hallucinated payloads before they run, absorb rate limits and outages with retries/backoff/circuit breakers, idempotency keys, human approval gates, encrypted credentials, replay, and signed-webhook results. Errors come back with an `llm_hint` the agent can self-correct from. Hosted remote (`api.klanexai.com/mcp`, free sandbox) or `npx -y
Context engineering MCP server. Generates CLAUDE.md from git history and architectural file sampling, and maintains a concept-map snapshot of features/flows → files so agents can skip grep/glob on repeat queries.
Autonomous testing for web apps — dispatch AI agents that open real browsers, execute test cases, and report pass/fail with screenshots. Generate user stories, test cases, and Playwright code from your app context. 8 tools for end-to-end test automation.
Enable AI assistants to interact with your feature flags in [Flipt](https://flipt.io).
Deterministic validation of AI-generated artifacts before acting on them: JSON Schema conformance, OpenAPI response conformance, SQL syntax per dialect. Typed verdicts with per-error fix hints. Hosted free tier with remote MCP endpoint; MIT, self-hostable.
Record an agent's tool-call workflow once, replay it deterministically at 0 tokens, and diff runs to catch drift — CI + snapshot tests for MCP tool-call workflows. `npx -y reelier serve`
MCP server for the VerifyAX platform. Enables agent evaluation, simulation testing, and functional/non-functional verification workflows through natural language.
Scaffold modern npm packages, CLIs, services, and full-stack monorepos from your agent. Three tools: inspect the option schema, preview the generated file tree, and write the project to disk — optionally creating the GitHub repo and pushing to it, or merging into an existing clone without overwriting anything. Also available as a CLI and a web configurator. `npx -y packkit-mcp`
Search @imqueue docs and scaffold typed services & clients for AI coding agents, access CLI and manage your service fleet.
Structural code context server for AI agents — compressed symbol indexes, dependency graphs, and git diffs via TypeScript AST analysis. Zero external dependencies, no vector database or embedding API required.
Read-only static scanner for MCP / agent-gateway production-readiness. The `scan_gateway` tool scores a repo across 7 security dimensions (RBAC, fail-closed, supply chain, observability, cost, secrets, prod-readiness). Never executes code or prints secret values.
Shorten links, read click analytics, generate branded QR codes, and manage links on opn.onl — the open-source, self-hostable URL shortener. Works with the hosted service or your own instance.
Reduced-motion / WCAG 2.2.2+2.3.3 verification for web animation: agents author validated specs; a deterministic compiler emits reduced-motion-safe, on-budget CSS. Keyless hosted endpoint (motion_catalog, motion_validate).
Native stdio bridge for the hosted Delx Protocol MCP endpoint, with one-command client install, doctor checks and live tool discovery.
Design-fidelity checks for AI agents: compare a Figma frame (or any design screenshot) against the rendered implementation and get structured discrepancies with CSS properties and severity. Resolves a natural-language component description to a URL + selector in your codebase, screenshots it with Playwright, and compares via vision AI using your existing Claude Code or Codex subscription — no API
Operator leaderboard measuring users, not models — ranks AI coding operators by token cascade efficiency (Yield = Cache Reads × Output / Input²). 15 MCP tools: rank, pull, submit (ed25519-signed), diagnose, simulate. Privacy-first: only token counts leave the machine. `npx sigrank`
Check whether an LLM model id is deprecated, retiring, or retired, and what to migrate to. Covers OpenAI, Anthropic, Azure, Bedrock, Google, and Cohere. No API key. `npx -y @llmintel/mcp` or `https://llmintel.ai/v1/mcp`
Free Agent Signal Optimization scanner for website/API agent readiness. Scores discovery, identity, trust, commerce, reputation, and memory signals; validates robots.txt AI bot rules, llms.txt, agent.json, Google A2A agent cards, MCP server cards, API catalogs, OAuth metadata, x402, pricing, security.txt, status endpoints, and cross-file identity consistency. Returns ASO maturity levels, evidence,
Audits a domain email deliverability: SPF, DKIM, DMARC, MX, mail provider, DNS blacklist, catch-all, and domain age, returning a 0-100 health score via an Apify actor.
Generate and read PDFs for AI agents: a `generate_pdf` tool (HTML, a URL, or a template + JSON → PDF) and a `read_pdf` tool (a PDF → text/markdown). Run locally with `npx @docweave/mcp` or use the hosted streamable-HTTP endpoint. Chromium-rendered, priced per document.
23-in-1 developer utility MCP server: web search, exchange rates, crypto prices, QR codes, JSON formatter, UUID, URL tools, domain check, RSS feeds, and more. 6 paid APIs via x402 micropayments ($0.003 USDC on Base). `npx myclaw-toolkit`