> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.0x.org/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.0x.org/_mcp/server.

# Rate Limits

> Understand how rate limits work for the 0x APIs

> **Note**
>
> Want higher rate limits? Check out our [available options](https://0x.org/pricing)

## Why do we have rate limits?

Rate limiting is used by the API to prevent abuse and ensure a reliable experience for all consumers.

## What are the rate limits for the 0x APIs?

The current limit for the Free Tier of our APIs is approximately 5 Requests Per Second (RPS). If you need higher rate limits, contact us on our [pricing page](https://0x.org/pricing) to learn about our custom plans.

## How are rates calculated?

The following is shared to help your team to maximize your app setup. The example below uses the 5 RPS Free Tier limit; however, the same logic applies to all tiers.

* The 5 RPS is 5 calls across our endpoints
* The 5 RPS is per fixed 1 second window; in other words, the API has fixed 1 second windows and will allow 5 calls any where within that 1 second window
* Opening an SSE connection (e.g. to `/cross-chain/quotes/stream`) counts as one request. Individual events delivered over the stream do not count as separate requests; each new connection (including reconnections) counts as a new request.
* You can view your current usage and limits on the [0x API Dashboard](https://dashboard.0x.org/login).