generated: '2026-08-17'
method: probed
source: https://developers.kardinal.ai/.well-known/agent-card.json
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: developers.kardinal.ai
conformance:
  spec: A2A 1.0.0
  grade: flavored
  protocol_version: '0.3'
  preferred_transport: HTTP+JSON
  deviations:
  - supportedInterfaces-instead-of-additionalInterfaces
  hard_checks:
    capabilities_is_object: true
    protocol_version_present: true
    skills_is_array: true
  note: >-
    All three hard checks pass (capabilities is an object, protocolVersion is present,
    skills is an array), but the card declares its transport list under
    `supportedInterfaces` rather than the A2A 1.0.0 `additionalInterfaces` member,
    which is an explicit flavored-grade deviation.
card:
  name: Kardinal API
  description: Documentation for Kardinal's self-service logistics optimization API.
  url: https://developers.kardinal.ai/
  version: 1.0.0
  skills: 1
  file: kardinal-agent-card.json
x-evidence:
  fetched: '2026-08-17'
  url: https://developers.kardinal.ai/.well-known/agent-card.json
  http_status: 200
  content_type: application/json
x-notes:
- >-
  The card is served from the Mintlify-hosted documentation site
  (developers.kardinal.ai) and its `url`, `provider.url` and `documentationUrl` all
  point at that documentation host rather than at an A2A task endpoint. It advertises
  a documentation-navigation posture, not a callable A2A agent for the ARO
  optimization API itself.
- >-
  The card's single skill resolves to a real provider-published Agent Skill at
  https://developers.kardinal.ai/.well-known/agent-skills/kardinal/skill.md (HTTP
  200), captured verbatim in skills/kardinal-route-optimization.md.
- >-
  The legacy path https://developers.kardinal.ai/.well-known/agent.json returned 404.
  On app.kardinal.ai every /.well-known/* path returns HTTP 200 with an HTML SPA
  shell, so that host was rejected as a false positive rather than recorded as a hit.