Free SEO audit API
Every free check is a JSON endpoint: send a site, get findings with the page and the fix for each. Use it as a free SEO checker API from scripts, dashboards and AI agents. No key and no signup.
free_limit.Start with the SEO audit API tutorial for a request example, JSON finding extraction, and a workflow for checking the evidence. Use the endpoint reference below for each operation.
POST /api/audit
Audit a site. Crawls a set of pages from outside the network and runs every check that applies (indexing, robots.txt, sitemap, canonicals, structured data, internal links, AI crawler access and more). Returns findings grouped by check, each with the page and the fix.
curl -X POST https://shipwork.io/api/audit -H "content-type: application/json" -d '{"url":"example.com"}'POST /api/score
Score a site 0-100. Runs the audit and returns a 0-100 health score, a letter grade, the top fixes and a shareable snapshot id.
curl -X POST https://shipwork.io/api/score -H "content-type: application/json" -d '{"url":"example.com"}'POST /api/bulk-status
Status codes for a list of URLs. For each URL: status code, every redirect hop, the final URL, and whether the final page is noindex or canonicalised elsewhere. Up to 100 URLs free; optional agent: googlebot, googlebot-smartphone or chrome.
curl -X POST https://shipwork.io/api/bulk-status -H "content-type: application/json" -d '{"urls":"https://example.com/\nhttps://example.com/old"}'POST /api/sitemap-generator
Generate an XML sitemap. Crawls a site from its home page and returns sitemap.xml of its indexable pages, with every excluded page and the reason.
curl -X POST https://shipwork.io/api/sitemap-generator -H "content-type: application/json" -d '{"url":"example.com"}'GET /api/check/{name}
Run one named check. Runs a single check on one address and returns its findings and the raw data it read.
Check names: agent-readiness backlinks certificate ct-logs dns domain-history email-auth headers headings hreflang-sitemap indexnow lighthouse mail-trust markup meta mixed-content rich-results serp-features shadow-inventory site-crawl sitemap-lastmod tech transport well-known
curl "https://shipwork.io/api/check/headers?url=example.com"
A site audit crawler API, without a key
Send a URL and the crawl runs server-side: the same checks the website runs, returned as JSON with the page and the fix for each finding. It stays a free JSON API, on the same allowance as the site, so a script can audit a page with no key and no signup.
MCP /mcp
Use Shipwork from an AI assistant. An MCP server over Streamable HTTP with five tools: run_site_audit, score_site, check_url_status, generate_sitemap and run_check. For signed-in accounts: create your personal MCP address and add it as a remote MCP server in Claude, ChatGPT or Cursor. Calls run as your account, with your allowance.
curl -X POST https://shipwork.io/mcp/YOUR_ADDRESS_TOKEN -H "content-type: application/json" -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'Every page on this site also answers Accept: text/markdown with a Markdown copy, for agents that read rather than render.