--- title: "Fumadocs: vendor profile: Agent Ready HTML" description: "Fumadocs, a framework: 1 of 6 standards stated as supported, 13 sourced facts, dated plans and what it does not do. Read 2026-11-05." canonical: https://agentreadyhtml.com/vendors/fumadocs/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # Fumadocs: vendor profile: Agent Ready HTML > Fumadocs, a framework: 1 of 6 standards stated as supported, 13 sourced facts, dated plans and what it does not do. Read 2026-11-05. Source: https://agentreadyhtml.com/vendors/fumadocs/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # Fumadocs: vendor profile In short Fumadocs adds llms.txt, .md routes and an MCP route only after a CLI step, so a fresh project has none. www.fumadocs.dev answered Accept: text/markdown with markdown on 2026-11-05 but sent Vary fields that left out Accept. On Next.js the docs hand the Vary header to the CDN, and no Astro recipe for negotiation exists. ## At a glance **standards.txt** fumadocs ```text llms-txt = partial markdown-negotiation = partial markdown-twin = partial initial-html = supports real-404 = no statement vary-accept = partial ``` 1 supports, 4 partial or announced, 1 no statement. **Fumadocs** Framework React docs framework for Next.js, React Router, TanStack Start, Waku and Astro; a CLI adds llms.txt, llms-full.txt, .md routes and an MCP route, and its docs give a proxy recipe for Accept: text/markdown with Vary: Accept. Type [Framework](https://agentreadyhtml.com/vendors/by-type/framework/) Operator, as the facts below state it Fuma Nama (maintainer) and contributors Home page [www.fumadocs.dev](https://www.fumadocs.dev/), answered HTTP 200 on 2026-11-05 Last read 5 November 2026 ## What it does for this layer - Fumadocs runs on Next.js, React Router, TanStack Start, Waku and Astro, and new projects start from npm create fumadocs-app. \[primary source\] [source](https://www.fumadocs.dev/docs), read 5 November 2026. - Running npx @fumadocs/cli feature llms switches on processed Markdown for the docs collection, adds docsLlms to lib/source.ts and creates the LLM routes. \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - In Fumadocs, llms.txt and llms-full.txt are app routes (app/llms.txt/route.ts and app/llms-full.txt/route.ts) returning docsLlms.index() and docsLlms.full(). \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - Fumadocs maps /docs/.md to the route /llms.mdx/docs//content.md through a Next.js rewrite and answers with Content-Type text/markdown. \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - For Accept-based negotiation fumadocs-core/negotiation exports isMarkdownPreferred and rewritePath, used in a proxy.ts that rewrites docs requests to the Markdown route. \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - Fumadocs leaves Astro out of Accept negotiation because Astro middleware runs only for on-request pages and docs pages are prerendered. \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - npx @fumadocs/cli feature mcp adds an /api/mcp route on the streamable HTTP transport with tools to list, search and read docs pages. \[primary source\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - Fumadocs configures ZBSearch out of the box, served from a server API endpoint or from a statically cached JSON file on static sites. \[primary source\] [source](https://www.fumadocs.dev/docs/search/orama), read 5 November 2026. - A Fumadocs site on Next.js becomes plain static HTML with output: 'export', which needs no Node.js server. \[primary source\] [source](https://www.fumadocs.dev/docs/deploying/static), read 5 November 2026. - Fumadocs calls its model server-first, built on React Server Components rather than a classic static generator. \[primary source\] [source](https://www.fumadocs.dev/docs/what-is-fumadocs), read 5 November 2026. - www.fumadocs.dev returned Markdown for /docs/what-is-fumadocs under Accept: text/markdown on 2026-11-05, but its Vary header listed rsc and next-router fields, not Accept; /docs with the same header still returned HTML. \[observed\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - fumadocs.dev answers every path with a 308 to www.fumadocs.dev, where llms-full.txt measured 950,600 bytes on 2026-11-05. \[observed\] [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. - GitHub shows fumadocs-core 16.18.0, fumadocs-ui 16.18.0 and @fumadocs/base-ui 16.18.0 released together on 2026-11-05. \[primary source, 2026-11-05\] [source](https://github.com/fuma-nama/fumadocs/releases), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | Fumadocs (fumadocs-core, fumadocs-ui, fumadocs-mdx) | Headless docs core, default UI and MDX content source for React frameworks. | Free, open source; MIT licence, free | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | partial | Fumadocs creates llms.txt and llms-full.txt routes after npx @fumadocs/cli feature llms; they are not present until that step. | source | | markdown-negotiation | partial | Fumadocs documents a proxy.ts with isMarkdownPreferred for Next.js, React Router and TanStack Start, and leaves Astro out. | source | | markdown-twin | partial | A rewrite of /docs/:slug*.md to /llms.mdx/docs/:slug*/content.md gives each page a Markdown URL once the LLM feature is added. | source | | initial-html | supports | Fumadocs renders through React Server Components and keeps the host framework's static site generation. | source | | real-404 | no statement | No statement found in the Fumadocs quick start, static build or AI pages; www.fumadocs.dev returned 404 for a made-up path on 2026-11-05. | none | | vary-accept | partial | Fumadocs says the negotiated response needs Vary: Accept but that Next.js drops Vary on App Router pages, so it must be set at the CDN. | source | ## Checks on its own site | Reading | Result | Date | | --- | --- | --- | | Home page request | HTTP 200; H1 in the initial HTML: yes; 1,762 words; 0 JSON-LD blocks | 2026-11-05 | | Request with Accept: text/markdown | HTTP 200, text/markdown, Vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch | 2026-11-05 | | /llms.txt at the host root | HTTP 200, text/plain, 16 KB, starts with an H1 | 2026-11-05 | | A made-up path | HTTP 404 | 2026-11-05 | | Ora score, cached | 57, grade C | 2026-10-06 | | Cloudflare keyless scan | 27, L1 Basic Web Presence | 2026-11-05 | ## What it does not do - On Next.js, Fumadocs cannot attach Vary: Accept to App Router page responses; its docs push that header to the CDN. [source](https://www.fumadocs.dev/docs/integrations/llms), read 5 November 2026. ## Related pages on this site - [Frameworks in this section](https://agentreadyhtml.com/vendors/by-type/framework/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [Fumadocs: home page](https://www.fumadocs.dev/) https://www.fumadocs.dev/, read 5 November 2026 2. [Quick Start | Fumadocs](https://www.fumadocs.dev/docs) https://www.fumadocs.dev/docs, read 5 November 2026 3. [AI & LLMs | Fumadocs](https://www.fumadocs.dev/docs/integrations/llms) https://www.fumadocs.dev/docs/integrations/llms, read 5 November 2026 4. [ZBSearch (default) | Fumadocs](https://www.fumadocs.dev/docs/search/orama) https://www.fumadocs.dev/docs/search/orama, read 5 November 2026 5. [Static Build | Fumadocs](https://www.fumadocs.dev/docs/deploying/static) https://www.fumadocs.dev/docs/deploying/static, read 5 November 2026 6. [What is Fumadocs | Fumadocs](https://www.fumadocs.dev/docs/what-is-fumadocs) https://www.fumadocs.dev/docs/what-is-fumadocs, read 5 November 2026 7. [Releases · fuma-nama/fumadocs · GitHub](https://github.com/fuma-nama/fumadocs/releases) https://github.com/fuma-nama/fumadocs/releases, read 5 November 2026 8. [Fumadocs LICENSE](https://raw.githubusercontent.com/fuma-nama/fumadocs/dev/LICENSE) https://raw.githubusercontent.com/fuma-nama/fumadocs/dev/LICENSE, 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/).