# Save post settings

> post_settings_save — Set the duplicate guard threshold (similarity_max 0.5–1).

Source: https://x.builera.app/docs/en/reference/post_settings_save

`post_settings_save` · Changes an X-Buddy setting

Set the duplicate guard threshold (similarity_max 0.5–1). expected_revision required.

| | |
|---|---|
| REST | `PUT /api/public/v1/settings/posts` |
| MCP tool | `post_settings_save` |
| Permission needed | `workspace.edit` — Owner, Manager |
| Scope group | `infra:write` |
| Group | Configuration and limits |
| Shown up front in profiles | — |

## Input {#input}

| Field | Type | Required | Description |
|---|---|---|---|
| `similarity_max` | number (0.5–1) | Yes |  |
| `expected_revision` | integer (1–∞) | Yes | The revision you read (optimistic locking); a newer revision fails with revision_conflict. |

## Result {#output}

Returns the operation's result in the `{ data, meta }` envelope.

> [!IMPORTANT]
> Needs an idempotency key (`Idempotency-Key`, 8–128 characters). Retrying with the same key never repeats the action.

> [!NOTE]
> Versioned setting: send the `expected_revision` (or `If-Match`) you read, or the write is refused.

## Example {#example}

### Call over REST {#example-rest}

```bash
curl -X PUT "https://reach-link-craft.lovable.app/api/public/v1/settings/posts" \
  -H "Authorization: Bearer $XBUDDY_API_KEY" \
  -H "Idempotency-Key: 6f1c2a90-example-key" \
  -H 'If-Match: "3"' \
  -H "Content-Type: application/json" \
  -d '{"similarity_max":1,"expected_revision":1}'
```

### Call over MCP {#example-mcp}

```json
{
  "method": "tools/call",
  "params": {
    "name": "post_settings_save",
    "arguments": {
      "similarity_max": 1,
      "expected_revision": 1,
      "idempotency_key": "6f1c2a90-example-key"
    }
  }
}
```

## Errors you may get {#errors}

| Code | HTTP | Retryable |
|---|---|---|
| [`unauthorized`](/docs/en/errors/unauthorized) | 401 | No |
| [`key_expired`](/docs/en/errors/key_expired) | 401 | No |
| [`integration_revoked`](/docs/en/errors/integration_revoked) | 401 | No |
| [`connection_not_linked`](/docs/en/errors/connection_not_linked) | 403 | No |
| [`integration_paused`](/docs/en/errors/integration_paused) | 403 | No |
| [`workspace_integrations_paused`](/docs/en/errors/workspace_integrations_paused) | 403 | No |
| [`integration_authorization_lost`](/docs/en/errors/integration_authorization_lost) | 403 | No |
| [`workspace_suspended`](/docs/en/errors/workspace_suspended) | 403 | No |
| [`forbidden`](/docs/en/errors/forbidden) | 403 | No |
| [`invalid_input`](/docs/en/errors/invalid_input) | 422 | No |
| [`rate_limited`](/docs/en/errors/rate_limited) | 429 | Yes |
| [`internal`](/docs/en/errors/internal) | 500 | Yes |
| [`read_only`](/docs/en/errors/read_only) | 403 | No |
| [`idempotency_key_required`](/docs/en/errors/idempotency_key_required) | 428 | No |
| [`idempotency_conflict`](/docs/en/errors/idempotency_conflict) | 409 | No |
| [`idempotency_processing`](/docs/en/errors/idempotency_processing) | 409 | Yes |
| [`conflict`](/docs/en/errors/conflict) | 409 | No |
| [`precondition_failed`](/docs/en/errors/precondition_failed) | 422 | No |
| [`revision_required`](/docs/en/errors/revision_required) | 428 | No |
| [`revision_conflict`](/docs/en/errors/revision_conflict) | 412 | No |

[Back to all operations](/docs/en/reference)