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

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
Home page: 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, read 5 November 2026.

Products and plans

Plans and prices as the vendor's own pages showed them on the date read.
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

The six standards this site tracks; no statement means the pages read said nothing.
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

Readings of gitbook.com, the vendor's own website, which describe that site and not the product.
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

Sources

GitBook: home page https://www.gitbook.com/, read 5 November 2026
SEO | GitBook Documentation https://gitbook.com/docs/publish/seo, read 5 November 2026
Plans | GitBook Documentation https://gitbook.com/docs/account-and-billing/plans, read 5 November 2026
Broken links | GitBook Documentation https://gitbook.com/docs/analytics/broken-links, read 5 November 2026
Product updates | Changelog | GitBook Documentation https://gitbook.com/docs/changelog, read 5 November 2026
LLM-ready docs | GitBook Documentation https://gitbook.com/docs/getting-started/llm-ready-docs, read 5 November 2026

Last reviewed 5 November 2026