Orthogonal

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1

0.03 USDC
Atomic price: 30000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Payment option 2

30000 atomic units
Atomic price: 30000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "payTo": "0x0477aeC8513F73adfe6E3C813650b25a28Cba54A"
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "30000",
    "payTo": "0x0477aeC8513F73adfe6E3C813650b25a28Cba54A"
  }
]

Observed health

Status

Healthy

Latest latency

79 ms

Average latency

640 ms

HTTP status

204

Last checked

2026-11-02T05:16:45.422Z

Reachability

100% over 9 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "body": {
    "type": "object",
    "title": "SendMessageRequest",
    "required": [
      "body"
    ],
    "properties": {
      "cta": {
        "anyOf": [
          {
            "type": "object"
          },
          {
            "type": "null"
          }
        ],
        "title": "Cta",
        "examples": [
          {
            "url": "https://example.com/track/123",
            "display_text": "Track order"
          }
        ],
        "description": "WhatsApp only: a single tappable link button on an ordinary message. {\"display_text\": \"Track order\", \"url\": \"https://example.com/t/123\", \"footer\": \"Tap to see live status\"} — `footer` is optional. The url must be absolute and https. Unlike a URL button on a template this needs no Meta review, but as an ordinary message it only reaches someone inside the 24h window."
      },
      "body": {
        "type": "string",
        "title": "Body"
      },
      "list": {
        "anyOf": [
          {
            "type": "object"
          },
          {
            "type": "null"
          }
        ],
        "title": "List",
        "description": "WhatsApp only: a tap-to-open list menu. {\"button\": \"View options\", \"options\": [\"Small\", \"Medium\", \"Large\"]} (max 10 options, 24 chars each), or full form with sections: {\"button\": str, \"sections\": [{\"title\": str, \"rows\": [{\"id\": str, \"title\": str, \"description\": str}]}]}."
      },
      "buttons": {
        "anyOf": [
          {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          {
            "type": "null"
          }
        ],
        "title": "Buttons",
        "examples": [
          {
            "0": "Confirm",
            "1": "Reschedule",
            "2": "Cancel"
          }
        ],
        "description": "WhatsApp only: up to 3 tappable reply buttons (each max 20 chars). The tapped button's text arrives as a normal inbound message. Pass media_urls alongside buttons to render that image, video, or document as a header above the text, in the same bubble as the buttons (audio has no header form and is rejected)."
      },
      "channel": {
        "enum": [
          "whatsapp"
        ],
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Channel",
        "examples": [
          "whatsapp"
        ],
        "description": "Optional transport override for numbers connected to multiple channels. Pass \"whatsapp\" to send via the number's WhatsApp connection instead of its default SMS/iMessage transport. WhatsApp-only numbers use WhatsApp automatically."
      },
      "agent_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Agent Id"
      },
      "template": {
        "anyOf": [
          {
            "type": "object"
          },
          {
            "type": "null"
          }
        ],
        "title": "Template",
        "examples": [
          {
            "name": "order_shipped",
            "language": "en_US",
            "variables": [
              "1234"
            ]
          }
        ],
        "description": "WhatsApp only: send a Meta-approved message template. This is the only way to reach someone outside the 24h customer service window. {\"name\": \"order_shipped\", \"language\": \"en_US\", \"variables\": [\"1234\"]} — `variables` fill the template body, and `header_variables` does the same for a text header. Pass an array for a POSITIONAL template ({{1}}, {{2}}) or an object for a NAMED one, e.g. {\"variables\": {\"first_name\": \"Pablo\"}} for a body reading \"Thanks {{first_name}}!\". The shape must match how the template was authored. `language` defaults to en_US. The template must already be APPROVED (see the templates endpoints). `body` is NOT delivered for template sends — WhatsApp renders the approved template content — it is kept only as a fallback label if we can't render the template for your message history."
      },
      "media_url": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Media Url"
      },
      "number_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Number Id"
      },
      "to_number": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "To Number",
        "description": "Recipient of an existing chat: a phone (any format, normalized to E.164), US short code, email, or a group id (grp_...). Provide this OR `recipients` (to start a new group), not both."
      },
      "media_urls": {
        "anyOf": [
          {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          {
            "type": "null"
          }
        ],
        "title": "Media Urls"
      },
      "recipients": {
        "anyOf": [
          {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          {
            "type": "null"
          }
        ],
        "title": "Recipients",
        "examples": [
          {
            "0": "+14155551234",
            "1": "+16505551234"
          }
        ],
        "description": "Start a NEW iMessage group by listing 2 or more recipients (phones or emails). The first message is delivered to all of them, an iMessage group is created, and the response `to_number` returns the new group id (grp_...) to use for follow-up sends. iMessage numbers only."
      },
      "send_style": {
        "enum": [
          "celebration",
          "fireworks",
          "lasers",
          "love",
          "confetti",
          "balloons",
          "spotlight",
          "echo",
          "invisible",
          "gentle",
          "loud",
          "slam"
        ],
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Send Style",
        "examples": [
          "confetti"
        ],
        "description": "Optional iMessage expressive effect. Only valid on iMessage-capable numbers. Supported values: celebration, fireworks, lasers, love, confetti, balloons, spotlight, echo, invisible, gentle, loud, slam."
      },
      "from_number": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "From Number"
      },
      "reply_to_message_id": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "title": "Reply To Message Id",
        "examples": [
          "cmat9x3i20000a2m6y3d9r1u2"
        ],
        "description": "Optional parent message ID (AgentPhone Message.id) to send this message as an inline reply. Supported on iMessage and WhatsApp; the parent must be in the same chat and sent from the same number."
      }
    }
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
}

Output schema

{
  "type": "object",
  "title": "SendMessageResponse",
  "required": [
    "id",
    "status",
    "channel",
    "from_number",
    "to_number"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id"
    },
    "status": {
      "type": "string",
      "title": "Status"
    },
    "channel": {
      "type": "string",
      "title": "Channel"
    },
    "to_number": {
      "type": "string",
      "title": "To Number"
    },
    "media_urls": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "title": "Media Urls",
      "default": []
    },
    "from_number": {
      "type": "string",
      "title": "From Number"
    },
    "conversation_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Conversation Id"
    },
    "reply_to_message_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Reply To Message Id"
    },
    "reply_parent_unresolved": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "title": "Reply Parent Unresolved"
    }
  }
}