Developer Tools MCP Servers

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

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

A semantic search engine for files and code — find files by describing what they do, not their names. Local reusable indexes, configurable embedding providers (OpenAI, Gemini, Voyage, any OpenAI-compatible API, or fully offline local models), AST-aware code chunking, optional reranking. uvx vexor mcp or pip install vexor.

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

Grounding / hallucination guard: verify a claim against evidence (Supported/Refuted/Not Enough Evidence) with a confidence + abstain flag, for RAG and agents. npx -y eleata-verify-mcp.

Pre-flight dependency-upgrade impact analysis: reports exactly which of your code's API usages break before you bump a dependency, with line numbers, severity, and fix hints. Also verifies AI-written code against the actually-installed API to catch hallucinated calls. Static analysis only — never runs third-party code. Python + .NET. pip install bumpguard-mcp

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).

Secure host-level telemetry gateway enabling sandboxed AI agents to dynamically fetch container logs and track kernel resource metrics.

Native stdio bridge for the hosted Delx Protocol MCP endpoint, with one-command client install, doctor checks and live tool discovery.

Code-intelligence engine that indexes a repo into a persistent knowledge graph — functions, classes, call chains, HTTP routes, cross-service links. 159 languages via tree-sitter + Hybrid LSP, sub-ms structural queries, ~99% fewer tokens than grep. Single static binary, zero dependencies, 100% local. npx codebase-memory-mcp

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.

Official MCP server for Emailens, the rendering linter for email. Lint HTML email for rendering issues across 15 clients (Gmail, Outlook, Apple Mail and more), score CSS compatibility 0-100 per client, simulate dark mode, and get framework-native fix snippets for React Email, MJML, and Maizzle. npx -y @emailens/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, and prioritized fix plans. Local stdio or Glama-hosted, no API key required. npx -y @forgemeshlabs/aso-audit-mcp.

Local-first production-readiness audit for AI-built apps: read-only checks, an evidence-based 0-100 score, and guided fixes before launch.

Breaking-change diffs for npm packages so coding agents stop writing code against outdated API knowledge.

Start, observe, and interact with Claude Managed Agents from any MCP client — launch an agent, poll its events to watch it work, reply, approve the tools it wants to run, and stop it. Runs over stdio, an HTTP container, or AWS Lambda, with pluggable inbound auth (bearer/OIDC/Cognito).

"The official MCP server for the Nahook webhook platform — trigger webhooks, inspect deliveries, retry failures, and manage endpoints from your AI assistant."

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.

Index any TypeScript/React repo (including monorepos) into a queryable code graph. Reverse queries (who-renders, who-calls, find-references), blast-radius analysis, dependency cycles, dead-code orphans, and symbol signatures — exposed over stdio. Install: npx code-graph-indexer.

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.

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 documentation-drift detection for AI agents. Validates a project's canonical docs against its actual code — no LLM guessing; every finding has a stable code and a suggested fix. Five read-only tools over stdio: guard, score, explain, verify-claims, diagnose. npx -y docguard-cli mcp

MCP server for NowSecure Platform mobile security testing. List applications, pull remediation findings via GraphQL, and generate PDF reports locally (bypasses broken UI export). Published as nowsecure-mcp-server. npx -y nowsecure-mcp-server

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.

Change tracking for AI-era codebases. AI agents call it to log structured change events (entity + diff + reasoning) before the session ends, then query history with diff, blame, history, changeset, and search. Captures the intent that would otherwise evaporate.

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 keys. 90% mutation recall, zero false positives on its golden eval set. npx -y kiyas-cli mcp

Billing infrastructure for MCP server operators. Add Stripe subscriptions, per-call credits, tiered pricing, and x402 crypto micropayments to any MCP server without writing billing code. Operator dashboard included.

Apple-native execution layer for AI agents. Compiles TypeScript to validated Swift — App Intents, SwiftUI views, WidgetKit widgets, and full apps. 13 MCP tools, 150 diagnostics, 500 tests.

Discovery router for the agent-device CLI. Exposes status, install guidance, version-matched help, prompts, and resources for iOS, Android, tvOS, macOS, and Linux automation workflows.

Local repo-intelligence index and MCP server for coding agents — "what a repository knows about itself." Hybrid BM25 + vector semantic search, a tree-sitter code graph (callers/callees/imports across Rust, TS/TSX, Kotlin, C/C++, Python) with an optional compiler-grade SCIP oracle, queryable git/GitHub history, and typed, source-anchored repo memories (Invariant, Decision, Risk, …) that persist across sessions. Every result carries provenance — confidence labels and coverage warnings. Keeps source read-only; a background watcher keeps queries fresh. PreToolUse hooks augment grep and flag near-duplicate code as you write it. cargo install rag-rat

Local-first codebase intelligence engine. Gives coding agents structured context packets, indexed code/schema facts, and diagnostics over MCP, backed by a local SQLite store — so agents stop rediscovering your repo with raw grep. Optional Postgres/Supabase awareness and a bundled Claude Code plugin.

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

All-in-one developer tool and MCP Server for Roku development, featuring ECP device control, automated channel sideloading, BrightScript debugging, and real-time log monitoring.

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.

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.

Project-aware, read-only Nacos config & service-discovery server for Spring Cloud repos. Zero setup: auto-discovers every environment (dev/test/prod/...) from the repo's application/bootstrap files, with cross-environment key-level config diff. Single file, zero dependencies.

Generate engineer-grade SaaS specifications — design systems, database schemas, and RLS policies for AI build tools like Lovable, Cursor, and Claude Code.

MCP server for interactive .NET / ASP.NET Core debugging via netcoredbg. 27 tools: breakpoints (line, function, exception, data), stepping, thread inspection, exception autopsy, hang/deadlock analysis, and request tracing.

Production-grade MCP server for secure access to local dev environments (filesystem, databases, processes, OpenAPI). Includes scope enforcement, command allowlist, and read-only DB mode.

Semantic code index that extracts domain concepts, naming conventions, and behavioral similarity from codebases. One tool call instead of 19, ~20x fewer tokens for codebase understanding queries.

An AST-aware structural repository graph engine and MCP server designed for AI agents. Understands Go struct embeds, public API surfaces, SQL queries, and error mapping to give agents instant codebase context without blindly grepping.

An open-source observability layer for AI coding. Silently tracks dev tokens/time and auto-codifies AI deviations into persistent project rules.

Codebeamer ALM integration for managing work items, trackers, and projects. Provides 17 tools for reading and writing items, associations, references, comments, and risk management data via Codebeamer REST API v3.

Create crafted UI components inspired by the best 21st.dev design engineers.

Dependency intelligence for AI coding agents. Live CVE scanning, dependency health, upgrade planning, ecosystem news, and decision memory. 14 tools, zero config, privacy-first.

Full WordPress management via WP-CLI with 30+ tools for themes, plugins, posts, menus, users, database, scaffolding, and cache. Works locally or over SSH to remote servers.

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.

iOS code quality analysis and test automation server. Provides comprehensive Xcode test execution, SwiftLint integration, and detailed failure analysis. Operates in both CLI and MCP server modes for direct developer usage and AI assistant integration.