# Saxo OpenAPI POST /root/v1/sessions/events/subscriptions

Independent and unofficial. Not affiliated with or endorsed by any broker or platform named here. Educational only: nothing here is advice, and nothing here recommends a broker or a trade.

This is the markdown version of https://openbrokerapi.com/brokers/saxo/endpoints/sessions-events-subscribe, written from the same records as that page.

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

Sets up a streaming subscription on the session's capabilities, so a change in them is pushed to you.

- Request: `POST /root/v1/sessions/events/subscriptions`
- Version: v1
- Group: Session and user
- Status: verified. Source: [developer.saxo](https://www.developer.saxo/openapi/referencedocs/root/v1/sessions/post__root__events_subscriptions), checked 2026-10-12.
- Official reference: https://www.developer.saxo/openapi/referencedocs/root/v1/sessions/post__root__events_subscriptions

Note: Read on Saxo's own reference page on 12 Oct 2026: method, path, parameters and response fields. Needs an open WebSocket connection with the same ContextId. Updates after the first snapshot arrive on that connection, not in the reply to this call. Remove the subscription when you are done with it. The page lists no request parameters for this call, so none is recorded beyond the headers. The inner fields of Snapshot were not read.

## Parameters

- `Content-Type` (in header, type string, required): Send application/json on a request with a body.

### Authentication headers

- `Authorization` (type string, required): OAuth 2.0 bearer access token. In SIM you can use a 24 hour token from the Saxo developer portal. Placeholder only: never paste a real token into this site.

## Request

Written from the method, path and parameters recorded on this page, against the demo host. Not executed against a live or demo account. Credentials are read from environment variables on your own machine and are never entered on this site. The request builder at https://openbrokerapi.com/tools/request-builder writes these same snippets, from the same record.

### Python

```python
# Set SAXO_SIM_TOKEN as an environment variable first. Never paste real values into code.
import os
import requests

BASE_URL = "https://gateway.saxobank.com/sim/openapi"  # the demo host
headers = {
    "Authorization": "Bearer " + os.environ["SAXO_SIM_TOKEN"],
    "Content-Type": "application/json",
}
resp = requests.post(BASE_URL + "/root/v1/sessions/events/subscriptions", headers=headers, timeout=10)
resp.raise_for_status()
print(resp.json())
```

### JavaScript

```javascript
// Set SAXO_SIM_TOKEN as an environment variable first. Never paste real values into code.
// Run as a module, for example a .mjs file, on a Node version that has fetch built in.
const BASE_URL = "https://gateway.saxobank.com/sim/openapi"; // the demo host
const res = await fetch(BASE_URL + "/root/v1/sessions/events/subscriptions", {
  method: "POST",
  headers: {
    "Authorization": "Bearer " + process.env.SAXO_SIM_TOKEN,
    "Content-Type": "application/json",
  },
});
if (!res.ok) throw new Error(`HTTP ${res.status}`);
console.log(await res.json());
```

### curl

```bash
# Set SAXO_SIM_TOKEN as an environment variable first. Never paste real values into code.
curl -X POST "https://gateway.saxobank.com/sim/openapi/root/v1/sessions/events/subscriptions" \
  -H "Authorization: Bearer $SAXO_SIM_TOKEN" \
  -H "Content-Type: application/json"
```

## Response

A mock response. The values are invented, so check field names against the [official reference](https://www.developer.saxo/openapi/referencedocs/root/v1/sessions/post__root__events_subscriptions).

```json
{
  "_mock": true,
  "ContextId": "MOCKCONTEXT01",
  "ReferenceId": "MOCKREF01",
  "RefreshRate": 1000,
  "InactivityTimeout": 30,
  "Format": "application/json",
  "State": "Active",
  "Snapshot": {}
}
```

## Limits that apply at Saxo OpenAPI

- Headline limit: 120/min per session, per service group
  - Scope: session
  - Status: verified. Source: [developer.saxo](https://www.developer.saxo/openapi/learn/rate-limiting), checked 2026-09-18.
  - Note: Per session per service group; 1 order per second per session.

## More on the Saxo API

- [All Saxo API endpoints](https://openbrokerapi.com/brokers/saxo/endpoints): 68 documented, grouped by what they do.
- [Saxo API quickstart](https://openbrokerapi.com/brokers/saxo/quickstart)
- [All Saxo API error codes](https://openbrokerapi.com/errors/saxo)
- [Saxo API page](https://openbrokerapi.com/brokers/saxo): The full record: access, authentication, limits and the source for each.
- [Saxo API as an OpenAPI file](https://openbrokerapi.com/specs/saxo.json): Generated from these endpoint records. Independent and unofficial.

## Licence and how to cite

The records behind this page are all rights reserved. This file is the page itself, at its own address, in another format. It is not part of the CC BY 4.0 downloads listed at https://openbrokerapi.com/data. Quote from it with a link to the page.

Cite as: Saxo OpenAPI POST /root/v1/sessions/events/subscriptions. Broker API Hub, https://openbrokerapi.com/brokers/saxo/endpoints/sessions-events-subscribe, newest check 2026-10-12.

Where you rely on a single figure, cite the source and the checked date printed beside it as well. Where this page and a broker's own documentation differ, the documentation wins.