Send an SMS reply into an existing conversation.

POST 
/api/v1/conversations/:id/reply

Resolves the recipient phone from the conversation row; no "to" is required in the body. Respects opt-outs (422). From-number is the tenant dedicated SMS number (tenant_phone_numbers -> tenants.phone fallback). Scope: send_sms.

Request

Responses

200

SMS queued for delivery

400

Missing or invalid parameters

401

Invalid or missing API key

403

API key lacks the required scope for this endpoint

404

Resource not found or belongs to another account

422

Recipient has opted out of SMS.

429

Rate limit exceeded

Response Headers

X-RateLimit-Limit
X-RateLimit-Remaining
X-RateLimit-Reset
Retry-After