Legacy API Overview - Phonovation Developer Portal

These APIs are maintained for long-term support only. New integrations should use the Phonovation SMS API v2, which offers OAuth 2.0 authentication, campaign naming, scheduling, and improved error handling.

The v1 APIs are available at https://secure.interactsms.com/api/v1 and use basic credential authentication (username and password passed directly in the request body).

Available legacy APIs

JSON API (v1)

Send SMS via a JSON request body. Credentials passed as User and Password fields.

URL-Encoded API (v1)

Send SMS via application/x-www-form-urlencoded. Compatible with query-string integrations.

Key differences vs v2

Feature	v1 (Legacy)	v2 (Current)
Auth	Credentials in body	OAuth 2.0 JWT
Bulk send	Single recipient	Multiple recipients
Scheduling	Unix timestamp	ISO 8601 datetime
Campaign tracking	`NotifyId` only	`campaignName` + `notifyId`
Response format	Plain text / status string	Structured JSON

Last modified on July 16, 2026