--- title: "Sanity: vendor profile: Agent Ready HTML" description: "Sanity, a CMS: 0 of 6 standards stated as supported, 8 sourced facts, dated plans and what it does not do. Read 2026-11-05." canonical: https://agentreadyhtml.com/vendors/sanity/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # Sanity: vendor profile: Agent Ready HTML > Sanity, a CMS: 0 of 6 standards stated as supported, 8 sourced facts, dated plans and what it does not do. Read 2026-11-05. Source: https://agentreadyhtml.com/vendors/sanity/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # Sanity: vendor profile In short Sanity serves no public pages for a customer site, so the front end decides what an agent reads. Its field guide, published on 2026-02-19, covers llms.txt, edge conversion and markdown routes, and says Claude Code skips summarization when a server answers text/markdown. sanity.io itself answered Accept: text/markdown with markdown on 2026-11-05. The Growth plan costs $15 per seat a month. ## At a glance **standards.txt** sanity ```text llms-txt = no statement markdown-negotiation = partial markdown-twin = no statement initial-html = no statement real-404 = no statement vary-accept = no statement ``` 0 supports, 1 partial or announced, 5 no statement. **Sanity** Content management system Headless content platform; the customer's front end renders the HTML. Sanity's own learning site serves markdown on Accept: text/markdown from structured content, and Sanity publishes a field guide on doing the same. Type [Content management system](https://agentreadyhtml.com/vendors/by-type/cms/) Home page [www.sanity.io](https://www.sanity.io/), answered HTTP 200 on 2026-11-05 Last read 5 November 2026 ## What it does for this layer - Sanity published "How to serve content to agents (a field guide)" on 2026-02-19, covering llms.txt, Cloudflare's edge conversion, markdown routes with content negotiation and APIs or MCP. \[primary source, 2026-02-19\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity says Sanity Learn answers Accept: text/markdown on the same URL and that a lesson page drops from 392KB of HTML to 13KB of markdown, a 97 percent reduction. \[vendor claim\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity's guide says the markdown is generated from the structured source rather than converted back from HTML. \[primary source\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity's guide advises "Probably don’t do llms.txt" for corpus dumps and cites Cloudflare's developer docs llms-full.txt at 46.6MB, about 12 million tokens. \[primary source\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity's guide says Claude Code sends Accept headers that leave out text/html and skips its summarization step when a server answers with Content-Type: text/markdown. \[vendor claim\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity exposes content to agents through GROQ queries, GraphQL and an MCP server, which its guide calls the far end of the spectrum. \[primary source\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity has published its SEO and AEO guidance as an agent skill for coding agents building on Sanity. \[primary source\] [source](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide), read 5 November 2026. - Sanity's Growth plan is priced at $15 per seat a month, and the Free plan includes up to 20 user seats and two public datasets. \[primary source, 2026-11-05\] [source](https://www.sanity.io/pricing), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | Sanity Content Lake and Studio | Hosted structured content store with an open-source editing studio, queried by the customer's front end. | From USD 15; Growth plan per seat per month; Free plan up to 20 seats | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | no statement | Sanity's guide discusses llms.txt but advises against corpus dumps; no generator is described. | none | | markdown-negotiation | partial | Sanity's guide shows Accept-header routes built on the customer's front end, as Sanity Learn does. | source | | markdown-twin | no statement | No platform-level .md copies in the pages read. | none | | initial-html | no statement | Rendering belongs to the customer's front end. | none | | real-404 | no statement | Rendering and status codes belong to the customer's front end. | none | | vary-accept | no statement | Not stated in the guide text read. | none | ## Checks on its own site | Reading | Result | Date | | --- | --- | --- | | Home page request | HTTP 200; H1 in the initial HTML: yes; 1,298 words; 0 JSON-LD blocks | 2026-11-05 | | Request with Accept: text/markdown | HTTP 200, text/markdown, Vary: Accept, x-sanity-variant | 2026-11-05 | | /llms.txt at the host root | HTTP 200, text/markdown, 29 KB, starts with an H1 | 2026-11-05 | | A made-up path | HTTP 404 | 2026-11-05 | | Ora score, cached | 72, grade B | 2026-11-01 | | Cloudflare keyless scan | 67, L5 Agent-Native | 2026-11-05 | | Shared crawl row | Tranco rank 3,733; home page HTTP 200; H1 in the HTML: yes; 1,598 words; JSON-LD types: none; answers markdown: yes; made-up path HTTP 404; llms.txt valid: yes | 2026-11-04 | ## What it does not do - Sanity serves no public web pages for a customer site; HTML, markdown routes and 404s come from the front end the customer builds. ## Related pages on this site - [Content management systems in this section](https://agentreadyhtml.com/vendors/by-type/cms/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [Sanity: home page](https://www.sanity.io/) https://www.sanity.io/, read 5 November 2026 2. [How to serve content to agents (a field guide) | Sanity](https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide) https://www.sanity.io/blog/how-to-serve-content-to-agents-a-field-guide, read 5 November 2026 3. [Pricing | Sanity](https://www.sanity.io/pricing) https://www.sanity.io/pricing, 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/).