Agent readiness · Error monitoring
highlight.io
6 of 15 measurable points under formula 9.2, measured on 2026-08-12. 15 checks exist; each is one HTTP request with a published rule, so every sentence below can be rerun and argued with. 1 of them could not be measured from where we ask, and those are left out of the denominator rather than counted as failures.
A · Discovery
- PASSAnswers an agent user-agentAnswered 200 to LetAgentsIn/1.0 (+https://letagentsin.com/methodology)
- FAILllms.txt publishedNo llms.txt at any of the 6 locations probed
- PASSDocs readable without JavaScript8,687 characters of text without JS, on https://www.highlight.io/docs/getting-started/overview rather than on https://docs.highlight.io
- PASSOn-demand agents not blockedNo on-demand agent is blocked
- N/APaths robots.txt points at answerrobots.txt names no concrete path, only patterns or nothing, so there is no claim to check
- PASSNo punishing crawl delayNo Crawl-delay applies to the agents we check
B · Agent entry
- FAILAgent entry pointNone of the 9 known agent entry paths returns a file rather than your page shell
- FAILOAuth dynamic client registrationNo OAuth metadata on any of the 9 hosts probed, including the usual auth and api subdomains
- FAILMCP surfaceNo MCP surface: nothing answered at mcp.highlight.io, mcp.highlight.io/mcp, mcp.highlight.io/v1/mcp, api.highlight.io/mcp, /mcp or /api/mcp, and no file mentions MCP
C · Registration
- UNMEASUREDNo CAPTCHA in the signup HTMLUnmeasurable: the signup form at https://app.highlight.io/sign_up is not in the server HTML, so its gates are not eitherServer-render the form, or tell us the endpoint it posts to, and the gates become visible to us and to an agent.
- FAILSignup reachable without a browserhttps://app.highlight.io/sign_up is reachable, but its form needs JavaScript
D · Provisioning
- FAILProgrammatic key provisioningNone of the 7 provisioning phrases appears in the 4 documents we read
- PASSFree tier or no-card trial stated in textFree tier or no-card signals at https://highlight.io/pricing: "free trial", "Get started for free", "started for free"
E · Integration
- PASSTyped SDK on the registryhighlight.run@10.7.0 ships types, matched from the registry by who publishes it rather than by a link on your site
- FAILMachine-readable API descriptionNo OpenAPI spec at the 5 usual paths, none declared by https://docs.highlight.io, and no markdown negotiationPoint at your spec from your docs page with rel="service-desc" and an agent finds it without guessing.
Tell me when this changes
The failures here are the kind nobody notices. An edge rule that starts refusing agents changes nothing a person sees in a browser, so the first sign is usually an integration that quietly stopped working. We rescan weekly and write only when a verdict moves.
This page is the newest scan we hold for highlight.io and changes when we rescan. It is not a judgement of the product: we measure whether an unattended run can get through, not whether the thing is any good. The whole corpus is published as JSON and CSV.