generated: '2026-09-04'
method: searched
source: https://developer1.biogen.com/io-docs
summary: >-
  Biogen operates a separate NON-PRODUCTION developer portal — the "Biogen Non-Prod Developer
  Portal" at developer1.biogen.com — alongside its production portal at developer.biogen.com. The
  non-production portal's Interactive Documentation page is readable anonymously and serves a real,
  machine-readable API definition (harvested to openapi/_original/biogen-cdp-export-api-iodoc.json);
  the production portal's equivalent page lists no APIs to an anonymous visitor. The non-production
  gateway is a distinct host, dev1.api.biogen.com, so test traffic is separated by ENVIRONMENT AND
  HOST rather than by a test-vs-live key prefix.
environments:
  - name: Non-production
    portal: https://developer1.biogen.com/
    interactive_docs: https://developer1.biogen.com/io-docs
    api_host: https://dev1.api.biogen.com
    anonymous_readable: true
    note: >-
      The io-docs page renders without sign-in and exposes the CDP-Export-API/Package definition
      (apiId 23683, auth type "key"). Calling the gateway still requires a key: an anonymous GET to
      https://dev1.api.biogen.com/serviceexp/np returned HTTP 403 on 2026-09-04.
  - name: Production
    portal: https://developer.biogen.com/
    interactive_docs: https://developer.biogen.com/io-docs
    api_host: https://api.biogen.com
    anonymous_readable: false
    note: >-
      The production io-docs page renders but its API selector is empty to an anonymous visitor, and
      every documentation page answers HTTP 403 with "You don't have permission to read <page>.
      Please Sign In or Register."
credentials:
  model: api-key
  parameter: x-api-key
  location: header
  issuance: >-
    Keys are requested through the portal ("Request Access Key" / Manage Keys), which requires a
    portal account. The portal's Register link is disabled (empty href, and the portal stylesheet
    hides the register control) — sign-in is external SSO, so key issuance is not self-service.
  test_key_prefix: null
  note: >-
    Biogen publishes NO test cards, magic identifiers, fixture values, seeded test accounts or time
    simulation. Nothing of that kind was found and nothing has been invented here — the separation is
    environment-level only.
test_data:
  published: false
  values: []
time_simulation:
  published: false