---
title: "Probe the BBO stream"
url: https://docs.truemarkets.co/api/market-data/probe-bbo-stream
description: "Returns the stream's headers with no body, without opening a subscription or counting against the connection limits."
---

Docs index: https://docs.truemarkets.co/llms.txt

# Probe the BBO stream

```
HEAD https://api.truemarkets.co/v1/defi/market/stream/bbo
```

Returns the stream's headers with no body, without opening a subscription or counting against the connection limits.

## Responses

Every error status returns the same body, described in [Errors](https://docs.truemarkets.co/developer-resources/errors.md).

### 200

The stream is reachable.