AgentPhone

{
  "score": 68,
  "tier": "Verified",
  "history": [
    {
      "date": "2026-04-06",
      "score": 68,
      "tier": "Verified",
      "summary": "Initial evaluation. Excellent documentation, structured errors with agent-friendly 402 handling, and a dedicated skills.md entrypoint held back by human-gated onboarding and a polling-only result model with no webhooks."
    }
  ],
  "breakdown": [
    {
      "index": "01",
      "criterion": "Machine Authentication",
      "score": 20,
      "max": 20,
      "note": "Clean x-api-key header auth (ak_live_...), no OAuth or browser redirect required. The skills.md explicitly documents auth as x-api-key from AGENTPHONE_API_KEY, following standard agent env var conventions."
    },
    {
      "index": "02",
      "criterion": "Autonomous Onboarding",
      "score": 10,
      "max": 20,
      "note": "Free tier with no credit card required, but account creation still requires human signup at /auth/login. No programmatic onboarding path found."
    },
    {
      "index": "03",
      "criterion": "MCP Support",
      "score": 8,
      "max": 20,
      "note": "A skills.md descriptor is prominently featured via a dedicated \"I'm an Agent\" homepage entrypoint, providing a structured machine-readable API spec. No MCP endpoint or npm package available."
    },
    {
      "index": "04",
      "criterion": "API Documentation Quality",
      "score": 10,
      "max": 10,
      "note": "OpenAPI spec, skills.md (llms.txt equivalent), multi-language examples, full error code taxonomy, lifecycle states, and retry semantics all clearly documented."
    },
    {
      "index": "05",
      "criterion": "Real-Time Event Delivery",
      "score": 0,
      "max": 15,
      "note": "Polling-only architecture. No webhooks or push event mechanism — agents must repeatedly GET /calls/:id until status changes."
    },
    {
      "index": "06",
      "criterion": "Structured Error Responses",
      "score": 10,
      "max": 10,
      "note": "Consistent JSON {error, code} envelope with 11 named error codes, Retry-After on 429, buy_credits_url in 402 responses (a Stripe link agents can surface to users), and unsupported_region documenting the US/Canada-only constraint so agents can fail gracefully."
    },
    {
      "index": "07",
      "criterion": "Security Posture",
      "score": 7,
      "max": 10,
      "note": "HTTPS enforced, rate limiting documented at 10 calls/min with Retry-After header. No mention of API key scoping, rotation policy, or audit logs."
    },
    {
      "index": "08",
      "criterion": "Response Consistency",
      "score": 3,
      "max": 5,
      "note": "Versioned at /api/v1/ with consistent {data: {...}} response envelope throughout. No changelog or deprecation policy documented."
    }
  ]
}

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