---
# @generated by sylphx-gen. Do not edit.
title: "Advance a test clock"
description: "`money.test_clocks.advance` (POST /v1/{name}:advance): Advances Stripe time, never entitlements."
type: reference
product: payments
summary: "Advances Stripe time, never entitlements."
updated: 2026-09-28
nav: false
---

Advances Stripe time, never entitlements. Stripe processes asynchronously; poll GetTestClock until ready, then observe the genuine webhook's effects. Time only moves forward, within Stripe's subscription-interval bound.

- **Path** `POST https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/test_clocks/test-clock:advance`
- **Scope** `billing:write`
- **Effect** `write` — a successful call changes state.
- **Collection** [test_clocks](/docs/api/test_clocks)

## Request

| Field | Type | What it is |
| --- | --- | --- |
| `name` | `string` | The clock to advance. Required. |
| `frozen_time` | `timestamp` | Target simulated time. Whole seconds; must not precede current time. Repeating an already reached target is idempotent. Required. |

## Response

| Field | Type | What it is |
| --- | --- | --- |
| `name` | `string` | The clock's resource name. |
| `uid` | `string` | Stable identity, never reused. Output only. |
| `meta` | `ResourceMeta` | Resource metadata. Output only. |
| `subject` | `Subject` | The subject whose new Stripe customer will use this clock. A subject with an existing Money Stripe customer cannot acquire a clock. Required. |
| `frozen_time` | `timestamp` | Initial simulated time on create; current Stripe time on reads. Required on create. Only whole seconds are supported. Required. |
| `state` | `string` | Stripe's status: ready, advancing, or internal_failure. Poll GetTestClock until ready before the next simulation step. Ready does not mean Money has applied every webhook; observe the subscription and entitlement too. Output only. |
| `processor_clock_id` | `string` | Stripe clock id, for processor receipts. Output only. |
| `livemode` | `bool` | Always false; a live processor object is refused. Output only. |

### ResourceMeta

| Field | Type | What it is |
| --- | --- | --- |
| `generation` | `int64` | Increases by one on every change to `spec`. Output only. |
| `etag` | `string` | Strong ETag (AIP-154): changes on any change to spec, status, or metadata. Send it back as `If-Match` or `etag` to make Update and Delete conditional; a mismatch fails with ABORTED / 409 `ETAG_MISMATCH`. Output only. |
| `create_time` | `timestamp` | When the Resource was created. Output only. |
| `update_time` | `timestamp` | When the Resource last changed. Output only. |
| `delete_time` | `timestamp` | Set while the Resource is being deleted. Output only. |
| `labels` | `map<string, string>` | Caller-writable, indexed labels (AIP-122 label rules). |
| `annotations` | `map<string, string>` | Caller-writable, unindexed annotations. |
| `display_name` | `string` | Caller-writable human-readable name. |
| `creator` | `string` | The principal that created the Resource. Output only. |

### Subject

| Field | Type | What it is |
| --- | --- | --- |
| `end_user` | `string` | An end user's id (Sylphx Auth, or the app's own OIDC issuer). One of the `kind` group. |
| `customer_organization` | `string` | A customer organization's id. One of the `kind` group. |

## Errors

- [`UNAUTHENTICATED`](/docs/api/errors/UNAUTHENTICATED) — No valid key or token was presented.
- [`PERMISSION_DENIED`](/docs/api/errors/PERMISSION_DENIED) — The key lacks the method's permission.
- [`INVALID_FIELD`](/docs/api/errors/INVALID_FIELD) — A field failed validation.
- [`INVALID_STATE`](/docs/api/errors/INVALID_STATE) — The Resource is in a state that forbids the call.
- [`RESOURCE_NOT_FOUND`](/docs/api/errors/RESOURCE_NOT_FOUND) — The named Resource does not exist or is not visible.
- [`UNAVAILABLE`](/docs/api/errors/UNAVAILABLE) — The Resource store, the owning service's backend, or the key verifier's snapshot is unavailable; retry after Retry-After.

Every error arrives in the body [Errors](/docs/platform/errors) describes.

## Examples

**cURL**

```curl
curl -X POST "https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/test_clocks/test-clock:advance" \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"frozen_time":{}}'
```

**TypeScript**

```ts
const response = await sylphx.money.testClocks.advance({ frozenTime: {}, name: 'orgs/acme/projects/shop/envs/production/test_clocks/test-clock' })
```

**Rust**

```rust
let mut req = sylphx::money::AdvanceTestClockRequest::default();
req.frozen_time = Some(Default::default());
req.name = "orgs/acme/projects/shop/envs/production/test_clocks/test-clock".to_string();
let response = sx.money().test_clocks().advance(req).await?;
```

**CLI**

```bash
sylphx money test-clocks advance orgs/acme/projects/shop/envs/production/test_clocks/test-clock
```

**MCP**

```json
{ "method_id": "money.test_clocks.advance", "args": {"frozen_time":{},"name":"orgs/acme/projects/shop/envs/production/test_clocks/test-clock"} }
```