# Download the captured transcript, or its metadata

`GET /o/{org}/p/{project}/sessions/{session}/trajectory`

With `Accept: application/x-ndjson`, the raw transcript exactly as the
harness wrote it (its format is in the `X-Session-Format` header).
Otherwise a small JSON description of it. `404` until a transcript is
captured.

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `org` | path | string | yes | The org's slug or id. A caller with no role in the org gets `404`. |
| `project` | path | string | yes | A Project's handle (name) or id, resolved inside `{org}` — OR the reserved sentinel `_` meaning "no Project" (a direct-repo / repo-less dispatch on `POST`; "no Project constraint, resolve by session id alone" everywhere else). A real handle that doesn't match the session's actual Project is `404`.  |
| `session` | path | string | yes | The session's full id (`execution_id`). |

## Example request

```bash
curl "https://api.prix.dev/o/$RUSH_ORG/p/_/sessions/$SESSION_ID/trajectory" \
  -H "Authorization: Bearer $RUSH_API_KEY"
```

```typescript
const org = process.env.RUSH_ORG;
const sessionId = process.env.SESSION_ID;

const res = await fetch(`https://api.prix.dev/o/${org}/p/_/sessions/${sessionId}/trajectory`, {
  headers: {
    Authorization: `Bearer ${process.env.RUSH_API_KEY}`,
  },
});

console.log(res.status, await res.json());
```

```python
import os

import requests

org = os.environ["RUSH_ORG"]
session_id = os.environ["SESSION_ID"]

res = requests.get(
    f"https://api.prix.dev/o/{org}/p/_/sessions/{session_id}/trajectory",
    headers={"Authorization": f"Bearer {os.environ['RUSH_API_KEY']}"},
)

print(res.status_code, res.json())
```

## Responses

### 200

The metadata, or the raw transcript.

- `execution_id` (string, required)
- `format` (string | null, required)
- `bytes` (integer | null, required)
- `key` (string, required): Storage key of the transcript.
- `agent` (string | null, required)
- `captured_at` (string | null, required)

### 401

No bearer, an unknown, revoked or expired one, or an API key on a route keys cannot call.

### 404

No such resource for the caller, including one that exists in an org the caller cannot see.

## Example response (200)

```json
{
  "execution_id": "3f9c2a71d04b8e65",
  "format": "claude",
  "bytes": 482113,
  "key": "cloud-runs/3f9c2a71d04b8e65/session.claude.jsonl",
  "agent": "claude",
  "captured_at": "2026-10-06T15:09:03.000Z"
}
```