Connect
| Server URL | https://app.rank.fast/api/mcp |
|---|---|
| Transport | Streamable HTTP |
| Auth | OAuth 2.1 with PKCE and dynamic client registration. The client discovers everything from the URL; you sign in with a magic link the first time. Nothing to copy. |
| Claude | Settings, Connectors, Add custom connector, paste the URL. Works in claude.ai and the Claude desktop app. |
| Claude Code | claude mcp add --transport http rankfast https://app.rank.fast/api/mcp |
| Cursor, VS Code, others | Add an HTTP MCP server with the URL above; the OAuth flow opens in your browser. |
| Limits | Free account: 25 index checks a day, 25 keyword seeds a day, 15 AI visibility checks a day. Results are cached, so repeat questions cost nothing. |
Tools
check_google_indexing | Up to ten URLs per call. A free technical pre-check first (HTTP status, noindex, robots.txt, redirects, canonical), then a live Google results check. Answers indexed, not indexed with no blocker, or non-indexable with the exact reason. |
|---|---|
keyword_ideas | Real Google Autocomplete expansions of a seed keyword: questions, comparisons and qualifiers people actually type. Language and country selectable. No invented volumes. |
check_ai_visibility | Whether robots.txt blocks the ten crawlers that feed AI systems, whether llms.txt and structured data exist, and what ChatGPT, Claude and Grok say about the site from memory and with web search on, with cited sources. |
browse_marketplace | The curated guest post shelf: the roughly 2% of 159,736 marketplace listings that passed our screens and review. Filter by niche, minimum Domain Rating and quality grade. Anonymised profiles; ordering opens after the public pilot. |
All four tools are read-only. Nothing is submitted, bought or changed on your behalf.
Example prompts
Check whether these five URLs are in Google's index and tell me why any of them are not.
Give me the question-style searches people type around "google indexing service" and group them by intent.
Run an AI visibility check on example.com. Which AI crawlers are blocked, and does ChatGPT describe the company correctly?
Show me guest post sites in the travel niche with DR 50 or above and a quality grade of at least 4.
My new blog post was published three days ago. Is it indexed, and if not, is anything on the page blocking it?
What the answers mean
Indexed means the exact URL appeared in Google's results for a site: query at the moment of the check. Not indexed with no blocker means Google could index the page but has not, which is the state an indexing submission fixes and the service rank.fast sells. Non-indexable means something on your side prevents it, and the tool tells you what. Indexed is not ranked: being in the index is admission, not position.
Privacy
Sign-in is by email magic link. URLs you check are cached for 24 hours to make repeats free and are not published. The full policy is at rank.fast/privacy/. The same tools run on this site as free web tools with lower anonymous limits.
For directory maintainers
Name: rank.fast. Category: SEO, search, marketing. Hosted remote server, no install. Operator: Realtime Comms Ltd, United Kingdom. Contact: login@rank.fast. Manifest: /mcp/server.json.