Let Agents In

Agent readiness · Translation and localization

deepl.com

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.

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://developers.deepl.com/llms.txt and https://developers.deepl.com/llms-full.txt, and the 12 links we sampled across both files all answer
  • PASS
    Docs readable without JavaScript7,168 characters of text without JS
  • PASS
    On-demand agents not blockedNo on-demand agent is blocked
  • N/A
    Paths robots.txt points at answerrobots.txt names no concrete path, only patterns or nothing, so there is no claim to check
  • 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.deepl.com/v1/mcp, answered 401 with an auth challenge

C · Registration

  • PASS
    No CAPTCHA in the signup HTMLNo CAPTCHA vendor in the server HTML. A widget mounted later by JavaScript would not show here.
  • PASS
    Signup reachable without a browserForm renders in server HTML at https://www.deepl.com/en/signup?cta=checkout&is_api=true&productId=api-developer

D · Provisioning

  • FAIL
    Programmatic key provisioningNone of the 7 provisioning phrases appears in the 6 documents we read
  • PASS
    Free tier or no-card trial stated in textFree tier or no-card signals at https://deepl.com/pricing: "free trial", "Community Free"

E · Integration

  • PASS
    Typed SDK on the registrydeepl-node@1.28.0 ships types, matched from the registry by who publishes it rather than by a link on your site
  • PASS
    Machine-readable API descriptionDocs serve markdown to machines, at https://developers.deepl.com/docs/getting-started/quickstart

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 deepl.com 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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