---
# @generated by sylphx-gen 0.1.0 from contracts@e41a0a82ce4e85b77240402222da97d27f00a4498e6532efca0b4e93288879eb. Do not edit.
title: "List generations"
description: "`observability.generations.list` (GET /v1/{parent}/generations): Lists the environment's Sylphx AI calls, newest first, within the trace retention; filter by `request_model`, `outcome`, `api_key`, `start_time`, `tags.<key>` and the other…"
type: reference
product: monitoring
summary: "Lists the environment's Sylphx AI calls, newest first, within the trace retention; filter by `request_model`, `outcome`, `api_key`,…"
updated: 2026-09-28
nav: false
---

Lists the environment's Sylphx AI calls, newest first, within the trace retention; filter by `request_model`, `outcome`, `api_key`, `start_time`, `tags.<key>` and the other filterable fields.

- **Path** `GET https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/generations`
- **Scope** `observability:read`
- **Effect** `read` — nothing is written.
- **Collection** [generations](/docs/api/generations)
- **Query** `page_size`, `page_token`, `filter`, `order_by`
- **Pagination** the answer carries `generations` and, when there is more, `next_page_token`

## Request

| Field | Type | What it is |
| --- | --- | --- |
| `parent` | `string` | The parent to list in. Required. |
| `page_size` | `int32` | At most this many; default 50, clamped to 1000. |
| `page_token` | `string` | `next_page_token` of the previous page. |
| `filter` | `string` | AIP-160 filter over labels, filterable fields and `tags.<key>`. |
| `order_by` | `string` | AIP-132 ordering over filterable fields; default `start_time desc`. |

## Response

| Field | Type | What it is |
| --- | --- | --- |
| `generations` | `Generation[]` | The page. |
| `next_page_token` | `string` | The token of the next page; empty on the last page. |

### Generation

| Field | Type | What it is |
| --- | --- | --- |
| `name` | `string` | `orgs/{org}/projects/{project}/envs/{env}/generations/{generation}`. |
| `uid` | `string` | `gen_<cell><ulid>`; never reused. Output only. |
| `meta` | `ResourceMeta` | Resource metadata. |
| `trace_id` | `string` | The W3C trace id (32 hex); the caller's own when it sent `traceparent`. Output only. |
| `span_id` | `string` | The W3C span id (16 hex) of the gateway's span. Output only. |
| `operation` | `string` | `gen_ai.operation.name`, for example `chat`, `embeddings` or `generate_content`. Output only. |
| `api_surface` | `string` | The wire the call used: `responses`, `messages`, `chat_completions`, `embeddings`, `images`, `audio` or `realtime_transcription`. Output only. |
| `request_model` | `string` | The catalogue model id the caller named, for example `anthropic/claude-sonnet-5.5`. Output only. |
| `response_model` | `string` | The catalogue model id that answered. Output only. |
| `response_id` | `string` | The response id (`resp_...`, `msg_...` or `chatcmpl-...`). Output only. |
| `api_key` | `string` | The key that made the call, as a resource name. Output only. |
| `outcome` | `GenerationOutcome` | How the call ended. Output only. One of `succeeded`, `failed`, `cancelled`. |
| `finish_reasons` | `string[]` | `gen_ai.response.finish_reasons`, for example `stop` or `length`. Output only. |
| `error_type` | `string` | `error.type` when the call failed: the public error code, for example `rate_limited`. Output only. |
| `input_tokens` | `int64` | Input tokens, cached ones included. Output only. |
| `output_tokens` | `int64` | Output tokens, reasoning ones included. Output only. |
| `cache_read_input_tokens` | `int64` | Input tokens read from the prompt cache. Output only. |
| `cache_write_input_tokens` | `int64` | Input tokens written to the prompt cache. Output only. |
| `reasoning_output_tokens` | `int64` | Output tokens spent on reasoning. Output only. |
| `price_usd` | `string` | What the call was charged in USD, as a decimal string, for example `0.000420`; the same value as the response's `usage.sylphx.price`. Output only. |
| `start_time` | `timestamp` | When the gateway received the call. Output only. |
| `end_time` | `timestamp` | When the last byte of the answer was sent. Output only. |
| `time_to_first_chunk` | `duration` | From receipt to the first output chunk; unset when nothing streamed. Output only. |
| `streamed` | `bool` | Whether the answer was streamed. Output only. |
| `data_policy` | `string` | The data policy the call ran under: `standard`, `zdr` or `training`. Output only. |
| `tags` | `map<string, string>` | The caller's tags (`Sylphx-Tags` and the request's `metadata`), at most 64; filter as `tags.<key> = "value"`. Output only. |
| `end_user` | `string` | The caller's own end-user id (`user` or `safety_identifier`), as sent. 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. |

## 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.
- [`PAGE_TOKEN_MISMATCH`](/docs/api/errors/PAGE_TOKEN_MISMATCH) — A page token was reused with different parameters.

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

## Examples

**cURL**

```curl
curl "https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/generations" \
  -H "Authorization: Bearer $SYLPHX_API_KEY"
```

**TypeScript**

```ts
const response = await sylphx.observability.generations.list({ parent: 'orgs/acme/projects/shop/envs/production' })
```

**Rust**

```rust
let mut req = sylphx::observability::ListGenerationsRequest::default();
req.parent = "orgs/acme/projects/shop/envs/production".to_string();
let response = sx.observability().generations().list(req).await?;
```

**CLI**

```bash
sylphx observability generations list orgs/acme/projects/shop/envs/production
```

**MCP**

```json
{ "method_id": "observability.generations.list", "args": {"parent":"orgs/acme/projects/shop/envs/production"} }
```