Agent Ready HTML

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

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
Operator, as the facts below state it
SmartBear
Headquarters
United States
Home page
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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, read 5 November 2026.

Products and plans

Plans and prices as the vendor's own pages showed them on the date read.
ProductWhat it isPriceAs ofSource
Stoplight PlatformHosted 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		2026-11-05source
Stoplight Pro TeamPaid 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		2026-11-05source
Stoplight ElementsOpen source API reference components for HTML, React and Angular, plus Elements Dev Portal.Free, open source
No Stoplight account needed for basic use		2026-11-05source

Standards

The six standards this site tracks; no statement means the pages read said nothing.
StandardStatusWhat the vendor's pages saySource
llms-txtno statementNot mentioned in the Elements, Stoplight URLs, redirects or 2026 release notes pages on docs.stoplight.io.none
markdown-negotiationno statementStoplight'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-twinno statementThe Stoplight URLs page covers stable-ID and slug URLs only and mentions no markdown copy of pages.none
initial-htmlno statementStoplight 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-404no statementNo 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-acceptno statementStoplight documents no content negotiation, and its docs responses listed Origin and accept-encoding in Vary.none

Checks on its own site

Readings of stoplight.io, the vendor's own website, which describe that site and not the product.
ReadingResultDate
Plain fetch of the home pageNot requested: robots.txt disallows the homepage path for this user agent.2026-11-05
Ora score, cachedNot available: GET /api/score returned 404 DOMAIN_NOT_SCANNED2026-11-05
Cloudflare keyless scan20, L1 Basic Web Presence2026-11-05
Shared crawl rowoutside the ranked slice; the shared crawl recorded no home page read for this domain2026-11-04

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, read 5 November 2026.

Related pages on this site

Sources

  1. Stoplight: home page 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/, read 5 November 2026
  3. 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, read 5 November 2026
  5. 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, read 5 November 2026
  7. October 2026 Deployments 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, read 5 November 2026
  9. 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, read 5 November 2026

Last reviewed 5 November 2026