# Builders Backlinks > A free backlink exchange for indie builders and small SaaS, driven from your coding agent over MCP. A free backlink exchange for indie builders and small SaaS, driven from your coding agent over MCP. Your agent finds the partner, writes the link into your repo, and we verify it went live. ## Facts - Website: https://builders-backlinks.com - Pricing: free - Categories: Marketing, Open Source - LotsDirectory page: https://lots.directory/products/builders-backlinks - Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet. ## Detailed info ## What is Builders Backlinks? Builders Backlinks is a reciprocal backlink exchange driven over MCP, with the same exchange on a web form. The server identity is builders-backlinks, version 0.1.0, on the path /api/mcp. ## What Builders Backlinks does Twelve tools are documented: three anonymous reads and nine authenticated writes. Anonymous reads are get_rules, get_categories, and search_partners. The worked trade uses submit_site, list_matches, respond_to_match, get_link_brief, and mark_link_placed. search_partners takes an optional category, one of 38 categories, dr_min and dr_max from 0 to 100, and a limit from 1 to 20, default 5. There is no cursor. Every row is masked, with no domain, no URL, and no email. A paste of a URL drafts a listing with category, an identity-scrubbed description, anchors, and Domain Rating. The URL stays hidden until both agree. ## Who Builders Backlinks is for People who already work in an agent, including Claude Code and Cursor, which are confirmed, and Codex CLI or Gemini CLI, which the docs say were not run end to end here. The same exchange is on the web form for someone without an agent. ## How Builders Backlinks works Add the server once. Nothing runs locally: there is no npm package and no binary. Transport is Streamable HTTP, and older clients that speak the 2025 revision use the same URL. The request budget is 60 seconds. submit_site does a live page fetch, a Domain Rating lookup, and an LLM call. Read tools work anonymously. Write tools need a bearer token. Matching runs weekly, or instantly if a partner is waiting. After both accept, the placement is classified and the link is checked on day 7, day 30, and then monthly. ## Key features - Anonymous get_rules, get_categories, and search_partners, plus authenticated tools used in the worked trade: submit_site, list_matches, respond_to_match, get_link_brief, and mark_link_placed. - Masked partner rows with category, Domain Rating, anchors, and no domain, URL, or email. dr_min and dr_max run from 0 to 100. The count is clamped to 20, and the default is 5. - House rules keep matching in the same category, or widen by exactly one adjacent step when a category is thin, and say so. - One link out and one link in. No credits, no points, and no queue. Parked domains, PBNs, expired-domain rebuilds, and link farms are turned down. - Placement is classified as content, footer, nav, or sidebar, and rel as dofollow, nofollow, or sponsored. The exchange never rejects a placement. - Only the SHA-256 of the key is stored. The plaintext is shown once and is unrecoverable. Unsubscribing disables the key. OAuth 2.1 is not built yet. ## Facts from builders-backlinks.com, checked 13 October 2026 - Server identity builders-backlinks, version 0.1.0. Endpoint path /api/mcp. Request budget 60 seconds. - Founding spots are handed out by hand. The page says to DM nicklaunches on X. - The web form uses the same exchange and the same rules as the agent. - OAuth 2.1 with dynamic client registration is described as not built yet. Header tokens are what clients use today. Written from Builders Backlinks's own website ([Homepage](https://builders-backlinks.com/), [Docs](https://builders-backlinks.com/docs/mcp)). The maker can claim this listing to edit it. ## FAQ ### Which clients are confirmed? Claude Code and Cursor are confirmed working. Codex CLI and Gemini CLI snippets follow those products' own MCP documentation, but they were not run end to end here, so the docs say to treat them as should-work rather than known-good. ### What can search_partners return? Active sites open to a trade. Every row is masked. Category is optional and is one of 38 categories. dr_min and dr_max run from 0 to 100. The count is clamped to 20, and the default is 5. There is no cursor and no offset. A row never includes a domain, a URL, or an email. ### When is the URL revealed? The URL stays hidden until both agree. A masked profile shows category, DR band, and the anchors it wants. After both accept, the two sides are revealed to each other. ### How are placed links checked? Both links are fetched and classified when marked placed, then again on day 7, day 30, and monthly. Matching runs weekly, or instantly if a partner is waiting. ### How does the key work? Read tools need no key. Write tools need a bearer token on the Authorization header. The key is bb_live_ followed by 32 bytes of base64url. Only the SHA-256 is stored. The plaintext is shown once and is unrecoverable. Unsubscribing disables the key. ### What are the house rules? The page says four of them: real sites only, same category or one adjacent step, one for one reciprocal, and the placement is your call. get_rules returns a one-line summary followed by the six rules. Parked domains, PBNs, expired-domain rebuilds, and link farms are turned down. --- Source: https://lots.directory/products/builders-backlinks ยท Machine-readable context by LotsDirectory.