httpbin.org

An AI agent would struggle to discover and understand the site's purpose due to missing metadata, sitemap, and robots.txt guidance.

2 pass · 11 warn · 8 fail · 21 n/a

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Discovery

2/22.2

Accessibility

9.5/33.3

Usability

20.1/44.4

Payments

n/a

Discovery 2/22.2

Homepage has a meta descriptiondetailsFAIL
no <meta name="description">
Fix: Add a <meta name="description"> of 50–200 characters summarising what the product does. Agents use it as the one-line answer to "what is this site".
Homepage has a descriptive titledetailsFAIL
no <title> element on the homepage
Fix: Add a <title> of 10–70 characters naming the product and what it does — it is the first thing an agent reads to decide what this site is.
robots.txt existsdetailsFAIL
robots.txt not served (HTTP 503)
Serve a /robots.txt. Without it, agent crawlers have to guess what they may fetch.

Badge

Shows the current scan score and grade for this domain, straight from the latest static pre-check.

[![agent ready](https://www.vorza.dev/api/badge/httpbin.org)](https://www.vorza.dev/score/httpbin.org)

<a href="https://www.vorza.dev/score/httpbin.org"><img src="https://www.vorza.dev/api/badge/httpbin.org" alt="agent readiness score" /></a>

Fix:

sitemap.xml exists and parsesdetailsFAIL

sitemap.xml not served (HTTP 503)

Fix: Publish /sitemap.xml listing your public pages, and reference it from robots.txt with a `Sitemap:` line.

Canonical URL declareddetailsWARN

no <link rel="canonical">

Fix: Add <link rel="canonical"> to the homepage so agents and crawlers converge on one URL for this page.

Open Graph tags presentdetailsWARN

no Open Graph tags

Fix: Add og:title and og:description meta tags.

API reference linked from the homepagedetailsN/A

no homepage links to inspect

Brand findable in agent searchdetailsN/A

search-based checks are deferred — excluded from the score

Documentation linked from the homepagedetailsN/A

no homepage links to inspect (see the accessibility checks — the homepage produced no parseable navigation)

Listed in an MCP registrydetailsN/A

registry lookup not implemented in v1 — excluded from the score rather than guessed

robots.txt allows agent crawlersdetailsN/A

no robots.txt to evaluate — nothing is blocked by rules that don't exist

robots.txt points at the sitemapdetailsN/A

no robots.txt

Accessibility 9.5/33.3

Homepage responds to an agent requestdetailsFAIL
agent request failed: timeout after 8s
Fix: The homepage must answer a plain HTTPS GET. Check DNS, TLS and any WAF rule that drops non-browser clients.
llms.txt is publisheddetailsFAIL
/llms.txt not served (HTTP 503)
Fix: Publish /llms.txt: a plain-markdown index that tells an agent what this product is and where the authoritative docs live. It is the cheapest high-leverage file you can add.
Homepage has readable text without JavaScriptdetailsFAIL
only 0 characters of readable text in the served HTML
Fix: Server-render the homepage's core content (SSR, static export, or prerendering). A client-rendered shell is empty to every agent.
Structured data (JSON-LD) on the homepagedetailsWARN
no JSON-LD blocks on the homepage
Fix: Add a JSON-LD block (schema.org Organization or SoftwareApplication) so agents get your name, description and links as data rather than prose.
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
Fix: Optional but increasingly expected: honour `Accept: text/markdown` by serving a markdown rendering of the page, so agents skip HTML parsing entirely.
Same response for agents and browsersdetailsWARN
browser got HTTP 503, agent got HTTP None
Fix: Serve agents and browsers the same status for the homepage.
Served over HTTPSdetailsPASS
https://httpbin.org/
No long redirect chain on the homepagedetailsPASS
0 redirect(s)
Docs are readable without JavaScriptdetailsN/A
/docs not served (HTTP 503) — docs may live on another path or host
Links in llms.txt resolvedetailsN/A
no llms.txt
llms.txt is structured markdowndetailsN/A
no llms.txt to parse
Content-to-markup ratio is reasonabledetailsN/A
no homepage HTML to measure

Usability 20.1/44.4

The /api root behaves predictablydetailsFAIL
/api → HTTP 503
Fix: A 5xx at the API root suggests an unhandled route. Return a 404 with a machine-readable body, or an index of available endpoints.
agents.md is publisheddetailsWARN
/agents.md not served (HTTP 503)
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.
A documentation endpoint respondsdetailsWARN
/docs → HTTP 503
Fix: Serve docs at the conventional /docs path, or redirect it to wherever they live. Agents try conventional paths first.
Errors are machine-readabledetailsWARN
a nonexistent path returned HTTP 503, not 404
Fix: Return 404 for paths that do not exist. A 200 on a missing page makes an agent believe it found something.
OpenAPI document publisheddetailsWARN
/openapi.json not served (HTTP 503)
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 503)
Fix: If you run an MCP server, advertise it at /.well-known/mcp.json so agents discover it without being told its URL.
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.