# Free MCP Server for SEO & Backlink Data — BacklinkMCP > Free MCP server for SEO agents: domain authority, backlinks, toxic flags, and live link verify. 10 lookups/day, no signup — Pro $19 for unlimited. - Canonical page: https://backlinkmcp.com/mcp-server-for-seo - MCP endpoint: `POST https://backlinkmcp.com/api/mcp` (JSON-RPC 2.0, streamable HTTP, no install, 13 tools) - REST: `GET https://backlinkmcp.com/api/v1/authority?domain=example.com`, `/api/v1/backlinks?domain=example.com` ([docs](https://backlinkmcp.com/docs.md)) - Pricing: Free = 10 lookups/day per IP, 25 backlink rows, no signup. Pro = $19/mo, unlimited daily lookups, 100 rows, `ai_visibility_report` (operator-issued; self-serve checkout is not live) - Data limits: the index is domain-level (referring domains with authority + outbound counts). No per-link URLs, anchor text or rel/dofollow. `domain_rating` is not Moz DA and not a Google factor - Site index for agents: https://backlinkmcp.com/llms.txt --- A remote Model Context Protocol server built for SEO agents: domain authority, ranked backlinks, toxic-link candidates, competitor prospects, and live link verification — callable as tools mid-conversation. Updated 2026-10-15 Proprietary web-scale link index with editorial-authority scoring. Not a live crawler on every request — use `verify_link_live` when freshness matters. SEO work is shifting into agents. Claude Desktop, Claude Code, Cursor, and other MCP clients can already research, draft, and ship — but they still need structured link data they can call as tools, not a dashboard to scrape. BacklinkMCP is that missing layer: a free remote MCP server for SEO that exposes backlink and authority lookups as first-class tools, with a paid Pro tier when you outgrow the daily free cap. ## What MCP is for SEO agents MCP (Model Context Protocol) lets an AI client discover and invoke tools over a standard JSON-RPC interface. Instead of writing custom HTTP glue for every agent, you add one remote URL. The client lists the tools, the model decides when to call them, and results come back as structured JSON the agent can reason over in plain language. For SEO, that means an agent can answer “who links to this competitor?”, “is this guest-post domain worth pitching?”, or “which of my linkers look spammy?” without opening Ahrefs, Moz, or a browser tab. If you’re choosing between tool-calling and raw HTTP, see [MCP vs REST API for SEO data](https://backlinkmcp.com/articles/mcp-vs-rest-api). ## Install in one URL BacklinkMCP is a remote MCP server at `https://backlinkmcp.com/api/mcp` — no local install, no binary. Point Claude Desktop, Claude Code, or Cursor at that URL and the tools appear. Step-by-step client configs are on the [docs page](https://backlinkmcp.com/docs) (MCP install section). For Pro, send `Authorization: Bearer YOUR_KEY`. `?key=` still works when a client can only store a URL, and that query string gets logged. ``` https://backlinkmcp.com/api/mcp ``` ``` claude mcp add --transport http backlinkmcp https://backlinkmcp.com/api/mcp ``` ## MCP tools for SEO Thirteen tools — three read the link index, one fetches the live web, three run link-building analysis, two cover AI visibility (robots/crawler audit free, LLM panel on Pro), and four run page-level technical SEO. Full schemas are on [/docs](https://backlinkmcp.com/docs#tools). - `domain_authority_score` — 0–100 style authority score plus referring-domain count for any domain in the index. - `top_linkers_for_domain` — highest-authority domains linking in (25 rows on Free and Pro). - `backlinks_for_domain` — ranked linker list (25 rows Free / 100 rows Pro) with per-linker authority and outbound counts. - `verify_link_live` — fetches a linking domain’s homepage in real time to confirm the link still exists today. - `find_link_prospects` — competitor backlink-gap: domains that link a competitor but not you. - `flag_toxic_links` — heuristic spam candidates on the low-authority linker tail (`order=asc`), not the high-authority head (review list, not auto-disavow). - `common_linkers` — intersect two or more domains to find who links the whole set. - `ai_visibility_report` — Pro tool: multi-LLM “best of category” panel with share-of-voice and link-informed next targets. - `ai_crawler_audit` — free robots.txt check vs 25 AI crawlers; splits visibility bots from training bots. - `site_audit` — page-level HTML fetch (no JS render, not a site crawl): title, meta, headings, canonical. - `schema_validate` — JSON-LD parse + recommended-field flags for common schema.org types. Not Google’s rich-result test. - `core_web_vitals` — relays Google PageSpeed Insights (lab + CrUX). A 429 is quota, not a site problem. - `indexnow_submit` — submits URLs to IndexNow. HTTP 200/202 means accepted for key verification, not crawled or indexed. Authority and backlink tools query our proprietary web-scale link index with editorial-authority weighting — links from high-trust domains count more than low-quality bulk referrers, aligned with how [Google’s spam policies](https://developers.google.com/search/docs/essentials/spam-policies) treat link schemes. This is not a continuous live crawler. Index data is point-in-time; use `verify_link_live` when you need a homepage href check today. ## Free tier vs Pro - **Free** — $0, no signup required: **10 lookups/day**, up to **25 rows** on `backlinks_for_domain`. - **Pro** — **$19/month**: unlimited daily lookups, up to **100 rows** per `backlinks_for_domain` call, plus `ai_visibility_report`. Both tiers share the same tool shapes and index. Pro lifts caps; it does not invent different fields. Details on [pricing](https://backlinkmcp.com/pricing). ## Try the same data in the browser The box below hits the live REST twins of the core MCP tools — `/api/v1/authority` and `/api/v1/backlinks` — so you can see real index results without configuring an agent first. ## Related pages - [Docs](https://backlinkmcp.com/docs) — install, tool schemas, REST shapes, auth, rate limits - [Pricing](https://backlinkmcp.com/pricing) — Free vs Pro caps - [MCP vs REST API](https://backlinkmcp.com/articles/mcp-vs-rest-api) — when to use which - [Ahrefs MCP alternative](https://backlinkmcp.com/ahrefs-mcp-alternative) — free remote MCP vs plan-gated Ahrefs MCP - [Free backlink checker](https://backlinkmcp.com/free-backlink-checker) — browser + REST entry point - [Ahrefs alternative](https://backlinkmcp.com/ahrefs-alternative) — general agent/API comparison ## Frequently asked questions ### Is the MCP server free? Yes. Free tier: 10 lookups per day (per IP or free key), up to 25 rows on `backlinks_for_domain`. Pro is $19/month for unlimited daily lookups and up to 100 rows. No signup required to try free. ### Does BacklinkMCP crawl the web live on every request? No. Authority and backlink tools read a proprietary web-scale link index. `verify_link_live` fetches a linking domain's homepage (not inner pages) to confirm a live href today. ### How do I install it in Claude or Cursor? Add `https://backlinkmcp.com/api/mcp` to your client’s MCP config. Full steps are on the [docs](https://backlinkmcp.com/docs) page. ### What SEO tools does the MCP server expose? Thirteen tools: `domain_authority_score`, `top_linkers_for_domain`, `backlinks_for_domain`, `verify_link_live`, `find_link_prospects`, `flag_toxic_links`, `common_linkers`, `ai_crawler_audit`, `ai_visibility_report` (Pro), `site_audit`, `schema_validate`, `core_web_vitals`, and `indexnow_submit`. ## Related tools & guides [MCP + REST docs](https://backlinkmcp.com/docs) [MCP vs REST](https://backlinkmcp.com/articles/mcp-vs-rest-api) [Ahrefs MCP alternative](https://backlinkmcp.com/ahrefs-mcp-alternative) [10 SEO MCP servers compared](https://backlinkmcp.com/articles/best-mcp-servers-for-seo) [Free backlink checker API](https://backlinkmcp.com/free-backlink-checker) [AI-search playbook](https://backlinkmcp.com/articles/how-to-rank-in-ai-search) [Can ChatGPT check backlinks?](https://backlinkmcp.com/articles/can-llms-check-backlinks)