Free SEO API & MCP server for AI agents

Website overview

Authority 0–100, Google traffic & keywords by country, competitors, backlinks.

domain_overview

Keyword research

Volume, difficulty, CPC, intent, trend, top-10 Google results, questions, related keywords.

keyword_overview

40 technical tools

DNS propagation, WHOIS, SPF/DMARC/DKIM, SSL, headers, redirects, robots.txt, sitemap, schema, Open Graph…

run_seo_tool

Connect the MCP server

Works with Claude (Desktop, Code, claude.ai connectors), ChatGPT developer mode, Cursor, VS Code, Windsurf and any MCP client. Transport: Streamable HTTP, no auth.

mcp.json / claude_desktop_config.json

{
  "mcpServers": {
    "nuqti": { "url": "https://nuqti.com/api/public/mcp" }
  }
}

Claude Code

claude mcp add --transport http nuqti https://nuqti.com/api/public/mcp

Or call the JSON API

Website

curl "https://nuqti.com/api/public/v1/domain?domain=example.com"

Keyword

curl "https://nuqti.com/api/public/v1/keyword?keyword=seo+tools&country=us"

Technical tool

curl "https://nuqti.com/api/public/v1/tools/dns-checker?q=example.com&q2=A"

Every response includes

"attribution": {
  "source": "Nuqti — SEO, to the point",
  "url": "https://nuqti.com/domain/example.com"
}

OpenAPI 3.1 llms.txt llms-full.txt ai-plugin.json MCP server card

Fair-use limits

requests per minute per IP

fresh lookups per IP per day (cached data is unlimited within the rate limit)

200

technical tool runs per IP per day

Tools available to agents

Website Authority Checker Free SEO Checker Meta Tag Checker Broken Link Checker DNS Propagation Checker DNS Records Lookup TXT Record Lookup CNAME Record Lookup Nameserver Checker MX Record Lookup DNSSEC Checker WHOIS Domain Lookup Domain Age Checker Website IP Lookup SPF Record Checker DMARC Record Checker DKIM Record Checker IP & Domain Blacklist Checker SSL Certificate Checker HTTP Header Checker Security Headers Checker Redirect Checker Bulk HTTP Status Code Checker Is It Down Right Now?Website Hosting Checker Robots.txt Tester & Validator XML Sitemap Validator Open Graph Checker & Link Preview Twitter (X) Card Validator Schema Markup Validator Hreflang Tags Checker Canonical Tag Checker Google SERP Preview Tool Keyword Density Checker H1 & Heading Structure Checker Website Technology Checker Web Page Size Checker llms.txt Generator Word Counter Character Counter

Frequently asked questions

Do I need a key or an account?

No. The API and the MCP server are open with no sign-up. There are fair per-IP limits so it can stay free for everyone.

Where does the data come from and how fresh is it?

From Nuqti's own database; every response includes when it was last updated. If we don't have a keyword or site yet, a small number of fresh lookups per IP per day is included.

Can I use it in a commercial product?

Yes — please cite Nuqti and link the attribution.url included in every response. For heavy use, create an account.

How is this different from a Nuqti account?

An account gives you every backlink and keyword, site audits, rank tracking and alerts — start free; Lifetime unlocks every row.

Want the full picture? Every Nuqti tool is free to start.

Site Explorer, Keywords Explorer, Site Audit, Rank Tracker and AI visibility — one sign-in with Google, no card.

Start free with Google

Free SEO data for ChatGPT, Claude and your agents