# Changelog Changes to the VanceTel API are listed here in reverse-chronological order. Additive changes ship continuously; any breaking change is announced here ahead of time and versioned under a new base path. Want updates pushed to you instead? Inbound activity is delivered via signed [Webhooks](/developers/docs/webhooks). API release notes are published on this page. ## 2026-05-31 - Initial public API: messages, contacts, webhooks, deep links, and the MCP server. - `POST /messages` and `GET /messages/{id}` for sending and looking up SMS/MMS. See [Send an SMS](/developers/docs/sms). - `POST /contacts` and `GET /contacts/{id}` for creating and resolving contacts. See [Contacts](/developers/docs/contacts). - `message.received` webhook for inbound messages, [HMAC-SHA256 signed](/developers/docs/webhooks) via the `X-Netexem-Signature` header. - [Deep links](/developers/docs/deep-links) for click-to-call and pre-addressed texts (recipient pre-filled). - [MCP server](/developers/docs/mcp) so AI agents and Claude Code can act on the phone system in the loop. - Bearer [API key authentication](/developers/docs/authentication) on all endpoints.