# Delete a version (/docs/api/voice-agents/agent-versions/deleteAgentVersion)

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`DELETE /v1/agent-media/agents/{agentId}/versions/{version}`

Delete a version

Delete a draft. Deleting a version that is already gone succeeds, because that is the state you asked for, so retrying a delete is safe.

Deleting one whose AGENT is gone does not: the agent is read first, so that answers 404. Both are idempotent, but only the first is a 204 — worth knowing if you retry a delete after deleting the agent, which takes its versions with it anyway.

The published version cannot be deleted. Publish a different version first.

## Request

**Base URL:** `https://api.tandemcx.ai`

**Authentication:** `Authorization: Bearer <token>` — A Tandem bearer token. Requests are scoped to the organization the token belongs to; no organization header is required.

### Path parameters

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `agentId` | string | Yes | The agent's unique ID. |
| `version` | string | Yes | The version number: `<major>.<minor>`, two non-negative integers with no leading zeros and at most nine digits each — `0.1`, `1.0`, `2.13`. You choose it. Anything else is rejected with `invalid_version`, because the number is part of the version's storage key. |

## Responses

### 204 — The version was deleted, or did not exist.

No response body.

### 400 — Nothing was deleted. `error` is `invalid_agentId` or `invalid_version` for a malformed path, or `version_published` when this version is the one the agent is serving.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `error` | string | No | A stable machine-readable code. |
| `message` | string | No | A human-readable explanation, safe to show to an end user. Present on errors an operator can act on; browser clients display this field in preference to a generic fallback. |
| `limit` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the bound itself. |
| `length` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the measured size of the rejected value. |
| `reason` | string | No | Present on some errors (e.g. `invalid_avatar_image`) that have more than one cause: which one applied. |

### 401 — Missing, malformed, or expired bearer token.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `error` | string | No | A stable machine-readable code. |
| `message` | string | No | A human-readable explanation, safe to show to an end user. Present on errors an operator can act on; browser clients display this field in preference to a generic fallback. |
| `limit` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the bound itself. |
| `length` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the measured size of the rejected value. |
| `reason` | string | No | Present on some errors (e.g. `invalid_avatar_image`) that have more than one cause: which one applied. |

### 404 — The resource does not exist.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `error` | string | No | A stable machine-readable code. |
| `message` | string | No | A human-readable explanation, safe to show to an end user. Present on errors an operator can act on; browser clients display this field in preference to a generic fallback. |
| `limit` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the bound itself. |
| `length` | integer | No | Present on some errors (e.g. `prompt_too_long`) that reject a value against a fixed bound: the measured size of the rejected value. |
| `reason` | string | No | Present on some errors (e.g. `invalid_avatar_image`) that have more than one cause: which one applied. |