Free No-Auth MCP Server Checks Backlink Placement, Anchors and Nofollow
h____ · reddit · 2026-10-20
A developer released linkbunny-checker, a free hosted MCP server that lets coding agents verify whether a published page actually links to you, with what anchor text, and whether it's nofollow—replacing manual view-source checking.
Core function: a single tool, inspectplacement, takes the page URL and expected destination URL and returns an outcome (found/notfound/indeterminate), each matching link's href, anchor text, rel tokens and nofollow flag, plus HTTP status, redirects and declared canonical. No account, API key or OAuth required.
Setup: Streamable HTTP, one command for Claude Code or Codex, or add as a custom connector in the Claude app.
Engineering details (useful for MCP server builders):
- One tool annotated readOnlyHint: true, destructiveHint: false; paid tools live in a separate package the no-auth server can't touch
- Stateless, JSON responses, no MCP session or SSE
- Hrefs and anchor text from third-party pages are returned as untrusted data, with server instructions telling the model they're never instructions (prompt injection defense)
- Fetching: public HTTPS only, DNS pinned and checked against private ranges, every redirect rechecked, max 5 hops, 10s per URL, 2 MiB HTML cap, no JavaScript
- Global rate limit (60 req/min, 4 concurrent); logs keep outcome codes and random IDs, not URLs
Limits: it only reads fetched HTML, so JS-injected links or bot-challenged pages can report notfound/indeterminate; it checks known links, doesn't discover backlinks. Listed in the official MCP Registry, with a browser version available.
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