generated: '2026-08-14'
method: probed
source: https://docs.herondata.io/.well-known/agent-card.json
description: >-
  Heron publishes a real A2A Agent Card at the canonical /.well-known/agent-card.json
  path on its documentation host (docs.herondata.io). The card is served by Heron's
  Mintlify-hosted developer documentation and advertises a single skill — "herondata" —
  whose body is a published Agent Skill markdown document. The card was saved verbatim
  to a2a/heron-agent-card.json. The API host (app.herondata.io), marketing host
  (www.herondata.io) and dashboard host (dashboard.herondata.io) all return 404 on both
  the canonical and the legacy path.
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: docs.herondata.io
x-evidence:
  fetched: '2026-08-14'
  url: https://docs.herondata.io/.well-known/agent-card.json
  http_status: 200
  content_type: application/json
card:
  name: Heron
  url: https://docs.herondata.io/
  version: '1.0.0'
  protocolVersion: '0.3'
  preferredTransport: HTTP+JSON
  provider:
    organization: Heron
    url: https://docs.herondata.io/
  documentationUrl: https://docs.herondata.io/
  capabilities:
    streaming: false
    pushNotifications: false
  defaultInputModes: [text/plain]
  defaultOutputModes: [text/plain]
  skills:
    - id: herondata
      name: Herondata
      url: https://docs.herondata.io/.well-known/agent-skills/herondata/skill.md
grade: conformant
grade_basis: >-
  Graded against A2A 1.0.0 hard checks: capabilities is an OBJECT (pass),
  protocolVersion is present (pass), skills is an ARRAY (pass). The optional
  fields preferredTransport, defaultInputModes and defaultOutputModes are all
  present, so this is a conformant card rather than near-conformant.
deviations:
  - field: description
    issue: >-
      The root-level description field required by the AgentCard schema is absent;
      the only human description lives on skills[0].description.
  - field: protocolVersion
    issue: >-
      Declares 0.3, not 1.0.0 — the card is written against the pre-1.0 protocol
      revision, so a 1.0 client should not assume 1.0-only fields.
  - field: supportedInterfaces
    issue: >-
      Uses supportedInterfaces[]; A2A 1.0.0 names this member additionalInterfaces.
  - field: url
    issue: >-
      Points at the documentation site root (https://docs.herondata.io/) rather than
      an A2A JSON-RPC endpoint, so the card is a discovery manifest for the docs
      agent surface rather than an addressable A2A agent. The nearest callable surface
      it implies is the MCP endpoint at https://docs.herondata.io/mcp (see mcp/).
  - field: skills[0].tags
    issue: Present but empty, so the skill carries no routing tags.
related:
  skill_document: skills/heron-herondata-skill.md
  skills_index: https://docs.herondata.io/.well-known/agent-skills/index.json
  mcp: mcp/heron-mcp.yml