--- title: "Stoplight: vendor profile: Agent Ready HTML" description: "Stoplight, a docs platform: 0 of 6 standards stated as supported, 13 sourced facts, dated plans and what it does not do." canonical: https://agentreadyhtml.com/vendors/stoplight/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # Stoplight: vendor profile: Agent Ready HTML > Stoplight, a docs platform: 0 of 6 standards stated as supported, 13 sourced facts, dated plans and what it does not do. Source: https://agentreadyhtml.com/vendors/stoplight/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # Stoplight: vendor profile In short A plain fetch of Stoplight's hosted docs returned 471 KB of HTML and five visible words, so the article text depends on JavaScript. The docs pages read mention no llms.txt or markdown output. SmartBear owns the product, and stoplight.io disallows every path for every crawler. ## At a glance **standards.txt** stoplight ```text llms-txt = no statement markdown-negotiation = no statement markdown-twin = no statement initial-html = no statement real-404 = no statement vary-accept = no statement ``` 0 supports, 0 partial or announced, 6 no statement. **Stoplight** Docs platform Stoplight is SmartBear's API design platform with hosted docs and the open source Elements renderer; its hosted docs pages reach a plain fetch as a near-empty JavaScript shell, and the docs pages read mention no llms.txt or markdown output. Type [Docs platform](https://agentreadyhtml.com/vendors/by-type/docs-platform/) Operator, as the facts below state it SmartBear Headquarters United States Home page [stoplight.io](https://stoplight.io/), not requested on 2026-11-05: robots.txt disallows the path Last read 5 November 2026 ## What it does for this layer - SmartBear's release on the deal described Stoplight as remote-first and based in Austin, Texas, with Harrison Yeager as its CEO at the time. \[primary source, 2023-08-22\] [source](https://smartbear.com/news/news-releases/smartbear-to-acquire-stoplight/), read 5 November 2026. - SmartBear said it expected to start folding Stoplight features into its own API design, documentation and portal products in the first half of 2024. \[primary source, 2023-08-22\] [source](https://smartbear.com/news/news-releases/smartbear-to-acquire-stoplight/), read 5 November 2026. - Stoplight renamed its Professional plan to Pro Team, and new Pro Team subscriptions include 15 seats instead of 10 but no longer bundle 50 free guests. \[primary source\] [source](https://docs.stoplight.io/docs/whats-new/future-professional-plan-updates), read 5 November 2026. - On Stoplight Pro Team every guest is billed as a standard user, at $24 a month on monthly billing or $19 a month on annual billing. \[primary source, 2026-11-05\] [source](https://docs.stoplight.io/docs/whats-new/future-professional-plan-updates), read 5 November 2026. - Stoplight publishes pages under stable-ID URLs, and adding a slug in the table of contents makes the old stable-ID URL redirect to the slug URL. \[primary source\] [source](https://docs.stoplight.io/docs/platform/hosted-docs/stoplight-urls), read 5 November 2026. - Stoplight Elements, the API reference toolkit built on OpenAPI and CommonMark, embeds in a CMS, portal or single-page app and needs no Stoplight account for basic use. \[primary source\] [source](https://docs.stoplight.io/docs/elements/d6a8ba3f3c186-stoplight-elements), read 5 November 2026. - Stoplight's free hosted docs plan renders documentation from a connected Git repository each time commits are pushed or merged. \[primary source\] [source](https://docs.stoplight.io/docs/elements/d6a8ba3f3c186-stoplight-elements), read 5 November 2026. - Stoplight's October 2026 release notes hold a single item, a fix for Daily Digest, billing and trial emails that stopped after an MJML 5.4 upgrade. \[primary source\] [source](https://docs.stoplight.io/docs/whats-new/october-2026), read 5 November 2026. - Stoplight's May 2026 release notes cover a Bitbucket Cloud project creation fix, a browser crash on circular $ref schemas and an API page that failed on a GraphStore error. \[primary source\] [source](https://docs.stoplight.io/docs/whats-new/may-2026), read 5 November 2026. - stoplight.io/robots.txt on 2026-11-05 held one group for every user agent with Disallow: /, which asks all compliant crawlers and agents to skip the whole marketing site. \[observed, 2026-11-05\] [source](https://stoplight.io/robots.txt), read 5 November 2026. - A curl GET of a hosted Stoplight docs article on 2026-11-05 returned about 471 KB of HTML with only 5 visible words once scripts were stripped, so the article text arrives only through JavaScript. \[observed, 2026-11-05\] [source](https://docs.stoplight.io/docs/platform/hosted-docs/stoplight-urls), read 5 November 2026. - docs.stoplight.io/sitemap.xml lists /docs/platform/use-a-custom-domain, yet that URL returned HTTP 404 on 2026-11-05, so the sitemap points crawlers at a dead path. \[observed, 2026-11-05\] [source](https://docs.stoplight.io/sitemap.xml), read 5 November 2026. - A docs.stoplight.io article asked for with Accept: text/markdown on 2026-11-05 still came back as text/html, with Vary set to Origin and accept-encoding. \[observed, 2026-11-05\] [source](https://docs.stoplight.io/docs/platform/hosted-docs/stoplight-urls), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | Stoplight Platform | Hosted API design, mocking, governance and documentation workspaces, with a free hosted docs plan. | Free tier, paid plans above it; Free plan stated in the Elements docs; stoplight.io/pricing is disallowed by robots.txt, so paid list prices were not read | 2026-11-05 | source | | Stoplight Pro Team | Paid workspace plan with 15 included seats; guests are billed as standard users. | Subscription, amount not recorded; Seat price for guests $24 per month monthly or $19 per month annual; base plan price not stated on the page read | 2026-11-05 | source | | Stoplight Elements | Open source API reference components for HTML, React and Angular, plus Elements Dev Portal. | Free, open source; No Stoplight account needed for basic use | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | no statement | Not mentioned in the Elements, Stoplight URLs, redirects or 2026 release notes pages on docs.stoplight.io. | none | | markdown-negotiation | no statement | Stoplight's docs read are silent on markdown output, and a docs article requested as text/markdown still came back as text/html on 2026-11-05. | none | | markdown-twin | no statement | The Stoplight URLs page covers stable-ID and slug URLs only and mentions no markdown copy of pages. | none | | initial-html | no statement | Stoplight says nothing about rendering in the pages read, and hosted docs articles gave curl 5 visible words of HTML on 2026-11-05. | none | | real-404 | no statement | No Stoplight page read covers status codes, while a sitemap-listed docs URL and a made-up path both answered 404 on 2026-11-05. | none | | vary-accept | no statement | Stoplight documents no content negotiation, and its docs responses listed Origin and accept-encoding in Vary. | none | ## Checks on its own site | Reading | Result | Date | | --- | --- | --- | | Plain fetch of the home page | Not requested: robots.txt disallows the homepage path for this user agent. | 2026-11-05 | | Ora score, cached | Not available: GET /api/score returned 404 DOMAIN_NOT_SCANNED | 2026-11-05 | | Cloudflare keyless scan | 20, L1 Basic Web Presence | 2026-11-05 | | Shared crawl row | outside the ranked slice; the shared crawl recorded no home page read for this domain | 2026-11-04 | ## What it does not do - Custom-domain redirect rules are not on Stoplight's free plan; the redirects doc lists them from the Startup plan up. [source](https://docs.stoplight.io/docs/platform/5603962774d07-redirects), read 5 November 2026. ## Related pages on this site - [Docs platforms in this section](https://agentreadyhtml.com/vendors/by-type/docs-platform/) - [Stoplight: platform profile and rubric scores](https://agentreadyhtml.com/platforms/stoplight/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [Stoplight: home page](https://stoplight.io/) https://stoplight.io/, read 5 November 2026 2. [SmartBear to Acquire Stoplight to Deliver Industry’s Broadest Portfolio of API Development Capabilities](https://smartbear.com/news/news-releases/smartbear-to-acquire-stoplight/) https://smartbear.com/news/news-releases/smartbear-to-acquire-stoplight/, read 5 November 2026 3. [Professional Plan Updates](https://docs.stoplight.io/docs/whats-new/future-professional-plan-updates) https://docs.stoplight.io/docs/whats-new/future-professional-plan-updates, read 5 November 2026 4. [Redirects](https://docs.stoplight.io/docs/platform/5603962774d07-redirects) https://docs.stoplight.io/docs/platform/5603962774d07-redirects, read 5 November 2026 5. [Stoplight URLs](https://docs.stoplight.io/docs/platform/hosted-docs/stoplight-urls) https://docs.stoplight.io/docs/platform/hosted-docs/stoplight-urls, read 5 November 2026 6. [Stoplight Elements](https://docs.stoplight.io/docs/elements/d6a8ba3f3c186-stoplight-elements) https://docs.stoplight.io/docs/elements/d6a8ba3f3c186-stoplight-elements, read 5 November 2026 7. [October 2026 Deployments](https://docs.stoplight.io/docs/whats-new/october-2026) https://docs.stoplight.io/docs/whats-new/october-2026, read 5 November 2026 8. [May 2026 Deployments](https://docs.stoplight.io/docs/whats-new/may-2026) https://docs.stoplight.io/docs/whats-new/may-2026, read 5 November 2026 9. [stoplight.io robots.txt](https://stoplight.io/robots.txt) https://stoplight.io/robots.txt, read 5 November 2026 10. [docs.stoplight.io sitemap.xml](https://docs.stoplight.io/sitemap.xml) https://docs.stoplight.io/sitemap.xml, 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/).