# Rankfield API endpoints

> 15 JSON endpoints with one free API key: link data for any domain, autocomplete for any keyword, and data from any live web page.

- Base URL: https://rankfield.dev
- Key: send `Authorization: Bearer YOUR_API_KEY`. Get a free key at https://rankfield.dev/?tab=key#playground (no account).
- Price: free. Each endpoint page lists its limits, if any.
- Docs: https://rankfield.dev/docs/get-started/quickstart (errors: https://rankfield.dev/docs/get-started/errors, rate limits: https://rankfield.dev/docs/get-started/rate-limits)
- MCP server: https://rankfield.dev/mcp
- Agent skill: https://rankfield.dev/agent-onboarding/SKILL.md

## Look up a domain

- [Site Strength](https://rankfield.dev/endpoints/site-strength.md): A 0–100 link authority score. `GET /v1/domains/{domain}/site-strength`
- [Referring Domains](https://rankfield.dev/endpoints/referring-domains.md): How many domains link to it, and the 20 strongest. `GET /v1/domains/{domain}/referring-domains`
- [All Referring Domains](https://rankfield.dev/endpoints/referrers.md): Every linking domain, paged or as a CSV export. `GET /v1/domains/{domain}/referrers`
- [Outbound Domains](https://rankfield.dev/endpoints/outbound-domains.md): Every domain it links to. `GET /v1/domains/{domain}/outbound-domains`
- [Referrer Profile](https://rankfield.dev/endpoints/referrer-profile.md): Its referring domains, counted in ten Site Strength ranges. `GET /v1/domains/{domain}/referrer-profile`
- [Dataset Status](https://rankfield.dev/endpoints/dataset-status.md): Which crawl release and graph build the link data comes from. `GET /v1/datasets/current`
- [Brand](https://rankfield.dev/endpoints/brand.md): A company's name, logos, colors, fonts and social profiles. `GET /v1/brand?domain={domain}`
- [Site Map](https://rankfield.dev/endpoints/map.md): Every URL of a website, from its sitemaps, feeds and links. `GET /v1/map?domain={domain}`
- [Site Audit](https://rankfield.dev/endpoints/site-audit.md): Every page of a website checked for technical SEO and AEO problems. `POST /v1/site-audit`

## Expand a keyword

- [Bing Suggest](https://rankfield.dev/endpoints/bing-suggest.md): Bing autocomplete suggestions, in 10 markets. `GET /v1/bing/suggest?query={keyword}`
- [DuckDuckGo Suggest](https://rankfield.dev/endpoints/duckduckgo-suggest.md): DuckDuckGo autocomplete suggestions. `GET /v1/ddg/suggest?query={keyword}`
- [Yahoo Search Predictions](https://rankfield.dev/endpoints/yahoo-search-predictions.md): Yahoo's search predictions. `GET /v1/yahoo/search-predictions?query={keyword}`

## Read a web page

- [Link Extraction](https://rankfield.dev/endpoints/html-links.md): Every link on a live page, with anchor text and rel values. `GET /v1/html/link-extraction?url={url}`
- [Scrape](https://rankfield.dev/endpoints/scrape.md): A page as Markdown, plus metadata, links, images and structured data. `GET /v1/scrape?url={url}`
- [Bot View](https://rankfield.dev/endpoints/bot-view.md): Which of 274 crawlers and AI bots robots.txt lets in. `GET /v1/bot-view?url={url}`