Let Agents In

Agent readiness · Model hosting and gateways

modal.com

8 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. 2 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://modal.com/llms.txt and https://modal.com/llms-full.txt, and the 12 links we sampled across both files all answer
  • PASS
    Docs readable without JavaScript3,709 characters of text without JS
  • PASS
    On-demand agents not blockedNo on-demand agent is blocked
  • PASS
    Paths robots.txt points at answerthe 1 concrete path your robots.txt allows all answer
  • 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
  • FAIL
    OAuth dynamic client registrationNo OAuth metadata on any of the 8 hosts probed, including the usual auth and api subdomains
  • UNMEASURED
    MCP surfaceUnmeasurable: every JSON-RPC POST we sent came back with an empty 2xx, including one to a path nobody registered, so what answered was your edge rather than your serverNothing for you to do if your server is reachable from other networks. Whether an MCP server is there becomes measurable from a network your edge does not intercept.

C · Registration

  • UNMEASURED
    No CAPTCHA in the signup HTMLUnmeasurable: the signup form at https://modal.com/signup 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://modal.com/signup is reachable, but its form needs JavaScript

D · Provisioning

  • FAIL
    Programmatic key provisioningNone of the 7 provisioning phrases appears in the 3 documents we read
  • PASS
    Free tier or no-card trial stated in textFree tier or no-card signals at https://modal.com/pricing: "$0", "free credits"

E · Integration

  • PASS
    Typed SDK on the registrymodal@0.9.0 ships types, matched from the registry by who publishes it rather than by a link on your site
  • FAIL
    Machine-readable API descriptionNo OpenAPI spec at the 5 usual paths, none declared by https://modal.com/docs, 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 modal.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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