--- title: "GitBook: vendor profile: Agent Ready HTML" description: "GitBook, a docs platform: 3 of 6 standards stated as supported, 14 sourced facts, dated plans and what it does not do. Read 2026-11-05." canonical: https://agentreadyhtml.com/vendors/gitbook/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # GitBook: vendor profile: Agent Ready HTML > GitBook, a docs platform: 3 of 6 standards stated as supported, 14 sourced facts, dated plans and what it does not do. Read 2026-11-05. Source: https://agentreadyhtml.com/vendors/gitbook/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # GitBook: vendor profile In short GitBook pre-renders published sites on the server and gives each an MCP server and a paginated llms-full.txt. A .md address that did not exist under gitbook.com/docs came back 200 with a Page Not Found body on 2026-11-05. The Free plan costs $0 a site. ## At a glance **standards.txt** gitbook ```text llms-txt = supports markdown-negotiation = no statement markdown-twin = supports initial-html = supports real-404 = partial vary-accept = no statement ``` 3 supports, 1 partial or announced, 2 no statement. **GitBook** Docs platform GitBook is a hosted docs platform whose published sites are pre-rendered on the server and ship .md copies, llms.txt, llms-full.txt and an MCP server, with a Broken links report that turns 404 traffic into redirect suggestions. Type [Docs platform](https://agentreadyhtml.com/vendors/by-type/docs-platform/) Home page [www.gitbook.com](https://www.gitbook.com/), answered HTTP 200 on 2026-11-05 Last read 5 November 2026 ## What it does for this layer - GitBook's SEO docs say published HTML is pre-rendered server-side so crawlers need no JavaScript, and every published page is cached and served through a global CDN. \[primary source\] [source](https://gitbook.com/docs/publish/seo), read 5 November 2026. - GitBook builds a sitemap for every published site that is not set to unlisted and serves it at /sitemap-pages.xml under the site home URL. \[primary source\] [source](https://gitbook.com/docs/publish/seo), read 5 November 2026. - Moving or renaming a GitBook page creates an automatic HTTP 307 redirect from the old URL to the new one. \[primary source\] [source](https://gitbook.com/docs/publish/seo), read 5 November 2026. - GitBook sets canonical URLs and fills meta and Open Graph descriptions from each page description, and it does not generate keyword meta tags at all. \[primary source\] [source](https://gitbook.com/docs/publish/seo), read 5 November 2026. - GitBook's Free plan costs $0 per site a month for one user and already lists LLM optimizations, while custom domains and site redirects start on Essential. \[primary source, 2026-11-05\] [source](https://gitbook.com/docs/account-and-billing/plans), read 5 November 2026. - GitBook charges $65 per site a month for Essential and $249 for Ultimate on annual billing, or $79 and $299 monthly, with 2,000 and 10,000 AI credits a month. \[primary source, 2026-11-05\] [source](https://gitbook.com/docs/account-and-billing/plans), read 5 November 2026. - GitBook's Broken links report, a beta on the Ultimate plan, reads 30 days of 404 traffic, keeps URLs hit at least three times and suggests redirects for the 60 most-visited. \[primary source\] [source](https://gitbook.com/docs/analytics/broken-links), read 5 November 2026. - GitBook's changelog of 2026-10-21 extended Broken links to outbound links, rechecking links to other websites and naming the failure, such as a dead domain or a timeout. \[primary source, 2026-10-21\] [source](https://gitbook.com/docs/changelog), read 5 November 2026. - GitBook's changelog of 2026-09-30 says published sites now send Markdown to the ChatGPT Search crawler. \[primary source, 2026-09-30\] [source](https://gitbook.com/docs/changelog), read 5 November 2026. - Since GitBook's 2026-09-30 release, each part of a paginated llms-full.txt names its part number at the top and links the previous and next parts. \[primary source, 2026-09-30\] [source](https://gitbook.com/docs/changelog), read 5 November 2026. - GitBook's changelog of 2026-07-29 added an askQuestion tool to published-site MCP servers with AI enabled, next to the ask query parameter that markdown routes already took. \[primary source, 2026-07-29\] [source](https://gitbook.com/docs/changelog), read 5 November 2026. - A curl GET of a made-up .md path under gitbook.com/docs on 2026-11-05 returned HTTP 200 text/markdown with a Page Not Found body, while the same path without .md returned 404. \[observed, 2026-11-05\] [source](https://gitbook.com/docs/getting-started/llm-ready-docs), read 5 November 2026. - On 2026-11-05 gitbook.com/docs sent Vary with Accept and an x-robots-tag: noindex only on the markdown answer; the HTML answer for the same URL listed Next.js router headers and accept-encoding but no Accept. \[observed, 2026-11-05\] [source](https://gitbook.com/docs/getting-started/llm-ready-docs), read 5 November 2026. - The initial HTML of gitbook.com/docs/publish/seo carried no application/ld+json block when fetched with curl on 2026-11-05. \[observed, 2026-11-05\] [source](https://gitbook.com/docs/publish/seo), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | GitBook Free | One-user docs site with Git sync, API playgrounds, preview deployments and LLM optimizations. | Free tier, paid plans above it; Free plan, $0 per site a month, one user | 2026-11-05 | source | | GitBook Essential | Branded public docs with custom domain, AI Assistant Ask, analytics, site redirects and 2,000 AI credits a month. | From USD 65; Essential, per site a month billed annually plus $12 per user; $79 monthly | 2026-11-05 | source | | GitBook Ultimate | Adds AI Assistant Chat, AI insights, GitBook Agent, adaptive content, authenticated access and 10,000 AI credits a month. | From USD 249; Ultimate, per site a month billed annually plus $12 per user; $299 monthly | 2026-11-05 | source | | GitBook Enterprise | Adds SAML SSO, migration service, custom integrations and Git Sync IP allowlisting. | Quote on request; Custom pricing | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | supports | The LLM-ready docs page lists llms.txt and llms-full.txt among the formats GitBook publishes on its own for each site. | source | | markdown-negotiation | no statement | No statement on Accept: text/markdown found in the LLM-ready docs page, which describes .md URLs; a curl with that header on 2026-11-05 did get text/markdown. | source | | markdown-twin | supports | GitBook's LLM-ready docs page documents a Markdown copy of each published page at the page URL plus .md. | source | | initial-html | supports | HTML is pre-rendered server-side so crawlers do not need JavaScript. | source | | real-404 | partial | HTML paths that do not exist return 404 and feed the Broken links report, but a made-up .md path returned 200 text/markdown on 2026-11-05. | source | | vary-accept | no statement | No statement on Vary found in the LLM-ready or SEO docs; on 2026-11-05 the markdown answer listed Accept in Vary and the HTML answer did not. | source | ## Checks on its own site | Reading | Result | Date | | --- | --- | --- | | Home page request | HTTP 200; H1 in the initial HTML: yes; 1,581 words; 1 JSON-LD block | 2026-11-05 | | Request with Accept: text/markdown | HTTP 200, text/markdown, Vary: Accept-Encoding, Accept | 2026-11-05 | | /llms.txt at the host root | HTTP 200, text/plain, 15 KB, starts with an H1 | 2026-11-05 | | A made-up path | HTTP 404 | 2026-11-05 | | Ora score, cached | 86, grade A | 2026-11-01 | | Cloudflare keyless scan | 67, L5 Agent-Native | 2026-11-05 | | Shared crawl row | Tranco rank 7,432; home page HTTP 200; H1 in the HTML: yes; 1,602 words; JSON-LD types: Organization, WebSite, SoftwareApplication; answers markdown: yes; made-up path HTTP 404; llms.txt valid: yes | 2026-11-04 | ## What it does not do - A missing .md URL on a GitBook site answers 200 with a Page Not Found markdown body, so an agent that trusts status codes reads it as a real page. - Broken links redirect suggestions and AI Assistant Chat are not on GitBook's Free or Essential plans; both sit on Ultimate. - GitBook's SEO page describes canonical, Open Graph and sitemap output but no JSON-LD, and the gitbook.com/docs SEO page itself had no ld+json block. ## Related pages on this site - [Docs platforms in this section](https://agentreadyhtml.com/vendors/by-type/docs-platform/) - [GitBook: platform profile and rubric scores](https://agentreadyhtml.com/platforms/gitbook/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [GitBook: home page](https://www.gitbook.com/) https://www.gitbook.com/, read 5 November 2026 2. [SEO | GitBook Documentation](https://gitbook.com/docs/publish/seo) https://gitbook.com/docs/publish/seo, read 5 November 2026 3. [Plans | GitBook Documentation](https://gitbook.com/docs/account-and-billing/plans) https://gitbook.com/docs/account-and-billing/plans, read 5 November 2026 4. [Broken links | GitBook Documentation](https://gitbook.com/docs/analytics/broken-links) https://gitbook.com/docs/analytics/broken-links, read 5 November 2026 5. [Product updates | Changelog | GitBook Documentation](https://gitbook.com/docs/changelog) https://gitbook.com/docs/changelog, read 5 November 2026 6. [LLM-ready docs | GitBook Documentation](https://gitbook.com/docs/getting-started/llm-ready-docs) https://gitbook.com/docs/getting-started/llm-ready-docs, read 5 November 2026 Last reviewed 5 November 2026 Edition Crawl 2026-11-04 Page updated 2026-11-05 Method How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).