generated: '2026-08-12'
method: probed
source: >-
  Live probe of https://api.adelphic.com/ and search of every publicly
  reachable Adelphic/Viant page for a published rate limit. No limits are
  documented and none can be observed anonymously.
limit_count: 0
limits: []
headers_observed:
  rate_limit_headers: []
  retry_after: false
  note: >-
    A 401 response from https://api.adelphic.com/ carries only
    `www-authenticate: Basic realm="Adelphic"`, `set-cookie: JSESSIONID=...`,
    `server-timing: traceparent`, `access-control-expose-headers: Server-Timing`
    and `content-language: en`. No X-RateLimit-*, RateLimit-* or Retry-After
    header is emitted on the unauthenticated path, so the runtime rate-limit
    signal cannot be characterized without customer credentials.
exhaustion_status: null
notes: >-
  Adelphic publishes no public API reference. The Adelphic knowledge base
  (help.viantinc.com, served from adelphic.zendesk.com) exposes only four
  articles anonymously — Chalice, Migrate Campaigns to Viant, Viant DSP
  Certification Program, Macros 101 — and returns 403 for the help-center HTML
  itself; the rest of the KB requires a signed-in customer account. An honest
  zero: limits almost certainly exist behind the wall, but none are published.
evidence:
- url: https://api.adelphic.com/
  status: 401
- url: https://help.viantinc.com/hc/en-us
  status: 403
- url: https://help.viantinc.com/api/v2/help_center/en-us/articles.json
  status: 200