---
title: "Trillet OEM changelog"
sidebarTitle: "Changelog"
description: "Dated changes to Trillet OEM, the white-label voice AI API for EHR vendors, telecom providers and software platforms."
lastUpdated: "2026-10-29"
---

> **For AI agents:** the complete documentation index is at [llms.txt](https://docs.trillet.ai/llms.txt). Append `.md` to any page URL for its markdown version.

Changes to the Trillet OEM API and its documentation, newest first. Within `/partner/v1` changes are additive, so existing integrations keep working. The `Trillet-Version` response header carries the date of the release that served each request.

<Update label="October 28, 2026" description="Trillet-Version: 2026-10-28" tags={["early access"]}>

First release to design partners in early access.

**Partner keys**
- [Partner keys](https://docs.trillet.ai/voice-engine/authentication) (`tpk_live_...`) that belong to your account, not a person, created and revoked in the **OEM API** section of account settings.
- Scopes per key, and optional restriction of a key to some tenants.
- `GET /partner/v1/key` to check a key's scopes and your tenant limit.
- A partner key can call a defined set of standard endpoints inside a tenant, with the tenant ID in `x-workspace-id`: agents, node flows, call flows, knowledge bases, numbers, calls, batch calls, call history, recordings, workflows and secrets.

**Tenants**
- [Create, list, update, suspend, resume, delete and restore](https://docs.trillet.ai/voice-engine/tenants) a tenant per customer, keyed by your own `externalId`.
- Suspension stops a tenant's outbound calls, SMS and workflow runs, and answers and ends inbound calls, while keeping its configuration and history.
- Deleted tenants can be restored for 30 days.

**Phone numbers**
- [Buy numbers per tenant](https://docs.trillet.ai/voice-engine/phone-numbers), billed to your partner account at the standard Trillet number price, with monthly renewal.
- Bring your own numbers over a SIP trunk or a Twilio account.
- Release numbers individually, or all at once when a tenant is deleted.

**Agents and call flows**
- Node flows created with a partner key start on the `platform-llm` model and recommended speech settings (responsiveness 10, interruption sensitivity 5.5).
- [Call flow settings](https://docs.trillet.ai/voice-engine/call-flow-settings): read and change the greeting, speech timing, recording and call handling timers on a tenant's call flow.

**Events**
- [Signed webhooks](https://docs.trillet.ai/voice-engine/events) in the Standard Webhooks format, for all tenants, with retries for about 22 hours, an event log kept for 30 days, and redelivery.
- Call events: `call.started`, `call.ended`, `call.analyzed`, `call.no_answer`, `call.failed` and `call.blocked`, with conversation data on by default and optional PII redaction.
- In-call events: `call.transferred`, `call.transfer_failed` and `tool.failed`.
- Booking, recording, workflow run, number, tenant and usage events.
- Recording download for a tenant's call.

**Usage and spend caps**
- [Usage](https://docs.trillet.ai/voice-engine/usage-and-billing) totals by day or month, per tenant or per charge type, and one row per call charge.
- Monthly spend caps per tenant, with alerts at 80% and 100%. Inbound calls continue at the cap.

**Conventions**
- `Idempotency-Key` on tenant creation and number purchase and registration, so retries never create anything twice.
- One error format with stable `code` values, cursor pagination and the `Trillet-Version` response header.

**Documentation**
- A [quickstart](https://docs.trillet.ai/voice-engine/quickstart) from partner key to first phone call, with curl, Node.js and Python.
- An [OpenAPI 3.1 specification](https://raw.githubusercontent.com/TrilletAI/trillet-ai-docs/main/public/openapi/trillet-oem.json) and a generated [API reference](https://docs.trillet.ai/voice-engine/api-reference/create-a-tenant).

</Update>