Static pre-check · Fri, 07 Aug 2026 06:50:47 GMT
heroku.com
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Discovery 21.1/22.2
API reference linked from the homepagedetailsWARN
no link to an API reference in the homepage HTML
Fix: If you have an API, link its reference from the homepage. If you don't, this check is safe to ignore.
Canonical URL declareddetailsPASS
https://www.heroku.com/
Documentation linked from the homepagedetailsPASS
3 docs link(s), e.g. https://www.heroku.com/developers/
Homepage has a meta descriptiondetailsPASS
135 characters
Homepage has a descriptive titledetailsPASS
'Heroku | The Cloud Application Platform For Developers' (54 chars)
Open Graph tags presentdetailsPASS
og:title and og:description present
robots.txt allows agent crawlersdetailsPASS
all 6 agent crawlers may fetch /
robots.txt existsdetailsPASS
HTTP 200, 375 bytes
robots.txt points at the sitemapdetailsPASS
robots.txt has a Sitemap: line
sitemap.xml exists and parsesdetailsPASS
8 URL(s) listed
Brand findable in agent searchdetailsN/A
search-based checks are deferred — excluded from the score
Listed in an MCP registrydetailsN/A
registry lookup not implemented in v1 — excluded from the score rather than guessed
Accessibility 30.8/33.3
llms-full.txt is publisheddetailsWARN
/llms-full.txt not served
Fix: Optional but cheap: publish /llms-full.txt with your docs inlined as one markdown file, so an agent can read everything in a single fetch.
Serves markdown when asked for itdetailsWARN
Accept: text/markdown → text/html; charset=UTF-8
Fix: Optional but increasingly expected: honour `Accept: text/markdown` by serving a markdown rendering of the page, so agents skip HTML parsing entirely.
Content-to-markup ratio is reasonabledetailsWARN
ratio 0.0312 — 13317 readable chars in 426448 bytes of HTML
Fix: Most of what you serve is markup and inline script rather than content. Reduce inline payloads or server-render more text so the signal-to-noise ratio favours readers.
Docs are readable without JavaScriptdetailsPASS
1637 characters of text at /docs
Homepage responds to an agent requestdetailsPASS
HTTP 200 for / (agent UA)
Served over HTTPSdetailsPASS
https://www.heroku.com/
Structured data (JSON-LD) on the homepagedetailsPASS
2 valid block(s) (WebPage)
llms.txt is publisheddetailsPASS
HTTP 200, 8390 bytes
Links in llms.txt resolvedetailsPASS
5 sampled link(s) all resolve
llms.txt is structured markdowndetailsPASS
has headings and markdown links
Same response for agents and browsersdetailsPASS
both User-Agents got HTTP 200
Homepage has readable text without JavaScriptdetailsPASS
13317 characters of text in the served HTML
No long redirect chain on the homepagedetailsPASS
1 redirect(s)
Usability 25.4/44.4
agents.md is publisheddetailsWARN
/agents.md not served (HTTP 404)
Fix: Publish /agents.md: what an agent may do here, which endpoints matter, auth requirements, and rate limits. It is the agent-facing counterpart to a README.
The /api root behaves predictablydetailsWARN
/api → HTTP 200 text/html; charset=UTF-8
Fix: Serve JSON from API paths, with an accurate content-type.
Errors are machine-readabledetailsWARN
404 returns HTML, not a machine-readable body
Fix: Content-negotiate your errors: return a JSON body with a stable `code` (and a `next_action` where recovery exists) to clients that ask for JSON.
OpenAPI document publisheddetailsWARN
/openapi.json not served (HTTP 404)
Fix: If you have an HTTP API, publish its OpenAPI document at a predictable path (/openapi.json). It is the difference between an agent reading your contract and an agent guessing it. If you have no HTTP API, ignore this.
.well-known/mcp.json advertises an MCP serverdetailsWARN
/.well-known/mcp.json not served (HTTP 404)
Fix: If you run an MCP server, advertise it at /.well-known/mcp.json so agents discover it without being told its URL.
A documentation endpoint respondsdetailsPASS
/docs → HTTP 200
MCP server completes the initialize handshakedetailsN/A
no MCP endpoint found to probe (none in the input URL and none advertised at /.well-known/mcp.json)
MCP tool parameters are typed and describeddetailsN/A
no listed MCP tools to inspect
Every MCP tool has a descriptiondetailsN/A
no listed MCP tools to inspect
MCP server lists toolsdetailsN/A
no MCP endpoint to probe
OpenAPI declares its auth schemedetailsN/A
no parseable OpenAPI document
OpenAPI operations are describeddetailsN/A
no parseable OpenAPI document
OpenAPI documents error responsesdetailsN/A
no parseable OpenAPI document
OpenAPI document is structurally validdetailsN/A
no parseable OpenAPI document
Payments not applicable — excluded from the score
Serves a 402 payment challengedetailsN/A
no agent-payment rail published — not applicable. This layer is excluded from the score rather than counted against the site.
Declares AP2 / ACP supportdetailsN/A
no agent-payment rail published — not applicable. This layer is excluded from the score rather than counted against the site.
Publishes x402 payment metadatadetailsN/A
no agent-payment rail published — not applicable. This layer is excluded from the score rather than counted against the site.
Badge
Shows the current scan score and grade for this domain, straight from the latest static pre-check.
[](/score/heroku.com)<a href="/score/heroku.com"><img src="/api/badge/heroku.com" alt="agent readiness score" /></a>