Schedule a message

Schedule an AI-written follow-up: once scheduled_at passes, the agent writes a message from context and sends it to the contact through your connected messaging account. Messages are billed when sent.

POST https://api.centerfy.ai/webhooks/inbound/scheduled-messages

Headers

Header	Required	Value	Description
`x-api-key`	Yes	your sub-account API key (cfy_…)	Authenticates the request; or use Authorization: Bearer `<key>`.

Body parameters

Name	Type	Required	Default	Description
`agent_id`	`string (uuid)`	Yes	—	Agent that will act; must be in this sub-account.
`contact_id`	`string (uuid)`	Yes	—	Contact to reach; must be in this sub-account.
`scheduled_at`	`string (ISO 8601)`	Yes	—	When to run, in the future, with a UTC offset or Z, e.g. 2026-10-08T14:00:00Z.
`context`	`string`	Yes	—	What it’s about — the agent uses this to know what to say (max 4000 characters).
`preferred_channel`	`string`	No	—	Channel to use when the contact’s conversation history doesn’t decide it. One of sms, email, whatsapp, instagram, facebook, live_chat. Otherwise SMS or email is used.

Request body

{
  "agent_id": "2b3c4d5e-6f7a-4b8c-9d0e-1f2a3b4c5d6e",
  "contact_id": "3f1c2a9e-7b4d-4c8a-9e2f-1a2b3c4d5e6f",
  "scheduled_at": "2026-10-08T14:00:00Z",
  "context": "Remind them about tomorrow's appointment and ask them to confirm.",
  "preferred_channel": "sms"
}

Example

curl -X POST "https://api.centerfy.ai/webhooks/inbound/scheduled-messages" \
  -H "x-api-key: $CENTERFY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "agent_id": "2b3c4d5e-6f7a-4b8c-9d0e-1f2a3b4c5d6e",
  "contact_id": "3f1c2a9e-7b4d-4c8a-9e2f-1a2b3c4d5e6f",
  "scheduled_at": "2026-10-08T14:00:00Z",
  "context": "Remind them about tomorrow'\''s appointment and ask them to confirm.",
  "preferred_channel": "sms"
}'

import { CenterfyClient } from "@centerfy/sdk";

const centerfy = new CenterfyClient({ apiKey: process.env.CENTERFY_API_KEY! });

const result = await centerfy.scheduledMessages.create({
  "agent_id": "2b3c4d5e-6f7a-4b8c-9d0e-1f2a3b4c5d6e",
  "contact_id": "3f1c2a9e-7b4d-4c8a-9e2f-1a2b3c4d5e6f",
  "scheduled_at": "2026-10-08T14:00:00Z",
  "context": "Remind them about tomorrow's appointment and ask them to confirm.",
  "preferred_channel": "sms"
});
console.log(result);

centerfy scheduledMessages create '{"agent_id":"2b3c4d5e-6f7a-4b8c-9d0e-1f2a3b4c5d6e","contact_id":"3f1c2a9e-7b4d-4c8a-9e2f-1a2b3c4d5e6f","scheduled_at":"2026-10-08T14:00:00Z","context":"Remind them about tomorrow'\''s appointment and ask them to confirm.","preferred_channel":"sms"}'

MCP tool: centerfy_scheduled_messages_create (see MCP server)

Response

{
  "status": "success",
  "scheduled_message": {
    "id": "9a0b1c2d-3e4f-4a5b-8c6d-7e8f9a0b1c2d",
    "agent_id": "2b3c4d5e-6f7a-4b8c-9d0e-1f2a3b4c5d6e",
    "contact_id": "3f1c2a9e-7b4d-4c8a-9e2f-1a2b3c4d5e6f",
    "context": "Remind them about tomorrow's appointment and ask them to confirm.",
    "preferred_channel": "sms",
    "scheduled_at": "2026-10-08T14:00:00.000Z",
    "status": "pending",
    "last_error": null,
    "sent_message": null,
    "sent_channel": null,
    "sent_at": null,
    "created_at": "2026-10-06T09:00:00.000Z",
    "updated_at": "2026-10-06T09:00:00.000Z"
  }
}

Errors

400 — if context is missing or too long, scheduled_at is malformed or not in the future, an id isn’t a UUID, preferred_channel isn’t allowed, or the contact has neither a phone number nor an email.
404 — if the agent or contact is not in this sub-account.

Notes

Returns 201. The status moves pending → processing → completed or failed; after sending, sent_message, sent_channel and sent_at are filled in, and last_error explains a failure.