# Save a version

Saves the current configuration as a named version you can diff against or roll back to.

|  |  |
| --- | --- |
| REST | `POST /api/v1/agents/{agent_id}/versions` |
| MCP tool | `create_version` |
| Classification | **Write** |
| Scope | `agents:write` |
| Minimum role on the agent | editor |
| Confirmation | Not needed |
| Retry safety | Send an `Idempotency-Key` header (REST) or `idempotency_key` argument (MCP) to retry safely |
| Success status | 201 |

## What it does

Saves the current configuration as a named version you can diff against or roll back to.

## Side effects

Saves a named snapshot. Nothing visitors see changes.

## Inputs

| Name | Type | Required | In | Description |
| --- | --- | --- | --- | --- |
| `agent_id` | string | yes | path | The agent id (agt_...), from list_agents. |
| `label` | string | no | body | Default "". |

## Example

REST:

```bash
curl -X POST "https://covo.lanaai.io/api/v1/agents/agt_4edc89bb2964/versions" \
  -H "Authorization: Bearer $COVO_TOKEN" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{"label":"Before launch"}'
```

MCP (POST /mcp):

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "create_version",
    "arguments": {
      "agent_id": "agt_4edc89bb2964",
      "label": "Before launch"
    }
  }
}
```

## Response

Returns an object with `number`, `label`, `revision`, `created_by`, `client` and `created_at`. This is a real response, shortened to two items per list.

201 response:

```json
{
  "number": 3,
  "label": "Before launch",
  "revision": 7,
  "created_by": null,
  "client": {
    "name": "docs-examples",
    "interface": "rest"
  },
  "created_at": "2026-10-07T20:14:41.903Z"
}
```

Over MCP the same object comes back as the tool result, in `structuredContent` and as JSON text.

## Errors

| Status | Code | Meaning |
| --- | --- | --- |
| 401 | `unauthorized` | No token, or it is unknown, revoked or expired. OAuth apps refresh or reconnect. |
| 403 | `account_suspended` | The account that owns the token is paused. |
| 403 | `insufficient_scope` | The token lacks `agents:write`. |
| 404 | `agent_not_found` | Unknown agent, or not reachable with this token. |
| 400 | `bad_request` | An input is invalid; `field` names it. |
| 409, 422 | `idempotency_in_progress`, `idempotency_key_reused` | See Idempotency on the REST page. |
| 403 | `plan_limit` | The plan is full; `details` has the limit. |
| 429 | `rate_limited` | Wait `Retry-After` seconds. |