Let Agents In

Agent readiness · Browser and scraping infrastructure

browserless.io

12 of 16 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

  • PASS
    Answers an agent user-agentAnswered 200 to LetAgentsIn/1.0 (+https://letagentsin.com/methodology)
  • PASS
    llms.txt publishedllms.txt and llms-full.txt present at https://www.browserless.io/llms.txt and https://docs.browserless.io/llms.txt and https://docs.browserless.io/llms-full.txt, and the 12 links we sampled across both files all answer
  • PASS
    Docs readable without JavaScript21,253 characters of text without JS
  • PASS
    On-demand agents not blockedNo on-demand agent is blocked
  • FAIL
    Paths robots.txt points at answer2 of the 3 concrete paths your robots.txt allows are gone, starting with /single-sign-on
  • PASS
    No punishing crawl delayNo Crawl-delay applies to the agents we check

B · Agent entry

  • FAIL
    Agent entry pointNone of the 9 known agent entry paths returns a file rather than your page shell
  • PASS
    OAuth dynamic client registrationregistration_endpoint published, but none of the 2 advertised grants (authorization_code, refresh_token) finishes without a person at a browser
  • PASS
    MCP surfaceLive MCP endpoint at https://mcp.browserless.io/mcp, answered 401 with an auth challenge

C · Registration

  • UNMEASURED
    No CAPTCHA in the signup HTMLUnmeasurable: the signup form at https://www.browserless.io/signup/email?plan=free 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.
  • FAIL
    Signup reachable without a browserhttps://www.browserless.io/signup/email?plan=free is reachable, but its form needs JavaScript

D · Provisioning

  • PASS
    Programmatic key provisioning2 of 7 provisioning phrases across the 7 documents we read: "management api", "service account"
  • PASS
    Free tier or no-card trial stated in textFree tier or no-card signals at https://www.browserless.io/pricing: "No card", "Free plan"

E · Integration

  • PASS
    Typed SDK on the registry@browserless.io/bap-ts@1.5.0 ships types
  • PASS
    Machine-readable API descriptionDocs serve markdown to machines, at https://docs.browserless.io/

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 browserless.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.

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