generated: '2026-08-13'
method: probed
source: https://developer.sendoso.com/.well-known/agent-card.json
provider: Sendoso
providerId: sendoso
description: Sendoso serves an A2A Agent Card from its own developer documentation host. The card is advertised by a Link header on every docs response (rel="agent-card"), alongside rel="agent-skills" and rel="mcp-server-card".
discovery:
  path: /.well-known/agent-card.json
  canonical: true
  host: developer.sendoso.com
x-evidence:
  fetched: '2026-08-13'
  url: https://developer.sendoso.com/.well-known/agent-card.json
  http_status: 200
  content_type: application/json
  bytes: 908
card:
  file: a2a/sendoso-agent-card.json
  name: Sendoso API
  url: https://developer.sendoso.com/
  version: 1.0.0
  protocolVersion: '0.3'
  preferredTransport: HTTP+JSON
  skill_count: 1
grade_basis: 'Graded against A2A 1.0.0. Hard checks pass: `capabilities` is an object, `protocolVersion` is present, `skills` is an array. Optional fields `preferredTransport`, `defaultInputModes` and `defaultOutputModes` are all present.'
deviations:
- field: description
  issue: The top-level `description` field, required by A2A 1.0.0, is absent. The only description lives on the single skill entry.
  severity: minor
- field: protocolVersion
  issue: Declares `0.3`, not `1.0.0`. `supportedInterfaces` is present, which is the newer shape, so the card mixes generations.
  severity: minor
- field: url
  issue: '`url` and `supportedInterfaces[0].url` both point at the documentation site (https://developer.sendoso.com/), not at an A2A JSON-RPC agent endpoint. An A2A client cannot send a task to this card; it is a discovery/description card.'
  severity: major
- field: skills[0].tags
  issue: Empty array — no tags to route on.
  severity: minor
- field: capabilities
  issue: 'Both declared capabilities are false: streaming false, pushNotifications false.'
  severity: informational
notes:
- The card is generated by the Mintlify documentation platform that hosts developer.sendoso.com, not hand-authored by Sendoso. It is still served from a host Sendoso controls, which is what the A2A discovery contract asserts, so it is recorded as a real hit — but the agent surface it points at is documentation search, not the Sendoso sending API.
- The skill it advertises resolves to https://developer.sendoso.com/.well-known/agent-skills/sendoso/skill.md, saved verbatim at skills/sendoso-skill.md.
- 'Probed and missed: /.well-known/agent-card.json and /.well-known/agent.json on sendoso.com (404) and app.sendoso.com (404), and /.well-known/agent.json on developer.sendoso.com (404).'
conformance:
  grade: conformant