> ## Documentation Index
> Fetch the complete documentation index at: https://docs.talkover.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Check Callback Constraints

> Validate a proposed callback configuration before saving

# Check Callback Constraints

Validate a proposed callback configuration without persisting changes. Useful to surface errors in the UI before submitting [Set Agent as Callback](/api-reference/endpoints/set-agent-as-callback) or [Update Callback Sources](/api-reference/endpoints/update-callback-sources).

## Endpoint

```
POST /api/v1/callback-agents/{agent_id}/check-constraints
```

## Path parameters

<ParamField path="agent_id" type="string" required>Agent UUID being configured as callback.</ParamField>

## Request headers

<ParamField header="Authorization" type="string" required>
  Bearer token. Format: `Bearer talq_your_environment_token_here`
</ParamField>

<ParamField header="Content-Type" type="string" required>
  Must be set to `application/json`
</ParamField>

## Request body

<ParamField body="is_callback_agent" type="boolean">Whether this agent should be marked as a callback agent.</ParamField>
<ParamField body="callback_source_agents" type="array">Array of source agent UUIDs.</ParamField>
<ParamField body="callback_trigger_statuses" type="array">Statuses of source-agent calls that make a contact eligible for callback (e.g., `["no_answer", "voicemail"]`).</ParamField>

## Examples

<RequestExample>
  ```bash theme={null}
  curl -X POST "https://app.talkover.ai/api/v1/callback-agents/agent-uuid-1/check-constraints" \
    -H "Authorization: Bearer talq_your_environment_token_here" \
    -H "Content-Type: application/json" \
    -d '{
      "is_callback_agent": true,
      "callback_source_agents": ["agent-uuid-2", "agent-uuid-3"],
      "callback_trigger_statuses": ["no_answer", "voicemail", "busy"]
    }'
  ```
</RequestExample>

## Response

### Valid

<ResponseExample>
  ```json theme={null}
  {
    "success": true,
    "message": "Configuration is valid"
  }
  ```
</ResponseExample>

### Invalid

<ResponseExample>
  ```json theme={null}
  {
    "success": false,
    "message": "Configuration has errors",
    "errors": [
      "Agent must be inbound to serve as a callback agent",
      "Source agent agent-uuid-3 is not published"
    ]
  }
  ```
</ResponseExample>