MCP Servers

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.

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.

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

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.

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.

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

Breaking-change diffs for npm packages so coding agents stop writing code against outdated API knowledge.

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/

Generate and read PDFs for AI agents: a generatepdf tool (HTML, a URL, or a template + JSON → PDF) and a readpdf tool (a PDF → text/markdown). Run locally with npx @docweave/mcp or use the hosted streamable-HTTP endpoint. Chromium-rendered, priced per document.

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

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

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

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

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.

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

Airflow REST API — 7 tools (DAG list, runs, task instances, log tails, trigger, clear). dag-health-rollup aggregation. Airflow 3.x /api/v2 + JWT (SimpleAuthManager); pin 0.1.x for Airflow 2.x. Read-only by default; trigger/clear write-gated.

🎖️ - Read-only-by-default MCP server for Datanika, the open-source ELT + dbt platform: browse connections, preview data, run and compile dbt transforms, monitor runs, and manage pipelines. 25 tools; opt-in --allow-write enables create/trigger.

Search, query, and publish charts across 2,300+ verified public datasets (World Bank, IMF, Eurostat, OECD, WHO). 28 MCP tools for data discovery, analysis, and visualization. Remote MCP + npm package.

Manage Apache Airflow through its REST API — list DAGs, inspect DAG runs and task instances, trigger runs, and check failed-DAG and scheduler/metadatabase health. 7 tools, built with FastMCP. Install: uvx mcp-airflow.

Search and enrich data from 250M+ companies across 50+ countries. Company lookup by name, VAT, or ID, NACE sector search, and financial data from official EU business registries. Free tier: 50 lookups/month. Install: npx scala-mcp-server.

MCP-first operations toolchain for SQLite, Cloudflare D1, and Turso. Inspect, diff, migrate, monitor, back up, and repair databases over stdio. Read-only by default; writes are opt-in, dry-run first, and auto-snapshot before applying. npx -y litescope mcp

Connect Redash to Claude — natural-language SQL with safety guards (blocks DROP/TRUNCATE, PII detection), BIRD-based smart table selection, plus saved queries, dashboards, widgets, and alerts.

Inspect and operate Redis-backed job queues (Asynq and BullMQ): per-state counts, job detail with decoded payload and last error, and faithful retry/delete running each library's own scripts. Read-only mode for production.

Ground-truth Firestore schema context for AI coding agents. Stops Cursor, Claude, and Windsurf from hallucinating field names and queries. Scans live collections, returns real field names, types, and presence rates.