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
- PASSAnswers an agent user-agentAnswered 200 to LetAgentsIn/1.0 (+https://letagentsin.com/methodology)
- PASSllms.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
- PASSDocs readable without JavaScript21,253 characters of text without JS
- PASSOn-demand agents not blockedNo on-demand agent is blocked
- FAILPaths robots.txt points at answer2 of the 3 concrete paths your robots.txt allows are gone, starting with /single-sign-on
- 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
- PASSOAuth dynamic client registrationregistration_endpoint published, but none of the 2 advertised grants (authorization_code, refresh_token) finishes without a person at a browser
- PASSMCP surfaceLive MCP endpoint at https://mcp.browserless.io/mcp, answered 401 with an auth challenge
C · Registration
- UNMEASUREDNo 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.
- FAILSignup reachable without a browserhttps://www.browserless.io/signup/email?plan=free is reachable, but its form needs JavaScript
D · Provisioning
- PASSProgrammatic key provisioning2 of 7 provisioning phrases across the 7 documents we read: "management api", "service account"
- PASSFree 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
- PASSTyped SDK on the registry@browserless.io/bap-ts@1.5.0 ships types
- PASSMachine-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.