curl --request POST \
  --url https://api.natural.co/agents/{agentId}/customers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "data": {
    "attributes": {
      "recipients": [
        {
          "type": "email",
          "value": "ops@example.com"
        },
        {
          "type": "phone",
          "value": "+14155550123"
        },
        {
          "type": "party_id",
          "value": "pty_4a8c9823f39c42a5b817556766551112"
        }
      ],
      "permissions": [
        "payments.create",
        "payments.read"
      ],
      "limits": {
        "perTransaction": 100000
      },
      "expiresAt": "2026-01-18T12:00:00.000Z",
      "tags": {
        "campaign": "q3_reactivation"
      }
    }
  }
}
'

{
  "data": [
    {
      "type": "customerInvitation",
      "id": "adi_550e8400e29b41d4a716446655440000",
      "attributes": {
        "recipient": {
          "type": "email",
          "value": "ops@example.com"
        },
        "url": "https://www.natural.co/connect/adi_550e8400e29b41d4a716446655440000",
        "status": "PENDING",
        "permissions": [
          "payments.create",
          "payments.read"
        ],
        "limits": {
          "perTransaction": 100000
        },
        "tags": {
          "campaign": "q3_reactivation"
        },
        "expiresAt": "2026-01-18T12:00:00.000Z",
        "createdAt": "2026-01-11T12:00:00.000Z",
        "updatedAt": "2026-01-11T12:00:00.000Z"
      },
      "relationships": {
        "agent": {
          "data": {
            "type": "agent",
            "id": "agt_3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f",
            "attributes": {
              "name": "Carrier Payment Agent",
              "description": "Autonomous agent that pays delivery carriers",
              "status": "ACTIVE"
            }
          }
        },
        "customerParty": {
          "data": null
        }
      }
    }
  ],
  "meta": {
    "emailFailures": []
  }
}