generated: '2026-09-18'
method: probed
source: https://developer.gemini.com/.well-known/agent-card.json
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: developer.gemini.com
  also_served_on:
  - docs.gemini.com
  advertised_at: https://developer.gemini.com/agents.md
x-evidence:
  fetched: '2026-09-18'
  url: https://developer.gemini.com/.well-known/agent-card.json
  http_status: 200
  content_type: application/json
card:
  name: Gemini Developer Platform Agent
  version: 1.0.0
  provider:
    organization: Gemini
    url: https://gemini.com
  skills:
  - gemini-trading
  - gemini-market-data
  - gemini-account-management
grade: flavored
grade_basis: 'Hard check failed: protocolVersion is absent. capabilities IS an object ({streaming, pushNotifications})
  and skills IS an array of three objects, so two of three hard checks pass, but A2A 1.0.0 requires protocolVersion.'
deviations:
- field: protocolVersion
  issue: absent
  impact: An A2A client cannot negotiate the protocol revision. Hard failure.
- field: url
  issue: absent
  impact: A2A 1.0.0 expects a top-level url naming the agent endpoint. Gemini publishes supportedInterfaces[] instead.
- field: supportedInterfaces
  issue: not an A2A 1.0.0 field
  impact: Carries the REST and WebSocket docs URLs; A2A models this as url + preferredTransport + additionalInterfaces.
- field: preferredTransport
  issue: absent
  impact: Optional in A2A 1.0.0.
- field: custom
  issue: not an A2A 1.0.0 field
  impact: Carries authentication types, documentation links and the agents.md instructions pointer. Useful, non-standard.
- field: $schema
  issue: points at https://a2a-specs.org/schemas/agent-card-v1.json
  impact: Not the A2A project schema URL; suggests the card was authored against a paraphrase of the spec.
- field: skills[].tags / skills[].examples
  issue: absent
  impact: A2A skills carry tags and examples; Gemini publishes id/name/description only.
note: This is a genuinely published, first-party agent card - one of the small minority of providers that serve one
  at all. It is graded flavored rather than conformant only because protocolVersion is missing; adding that one field
  plus a top-level url would move it to near-conformant or conformant.