# Rate Limits ### Overview The Nansen API implements rate limiting to ensure fair usage and system stability. Rate limits are applied per API key and vary by subscription tier. **Rate Limits:** The current rate limits are 20 **requests per second** and **300 requests per minute**. **Exceeding Rate Limits:** If you exceed the defined rate limits, the API will return an error response. You should expect a **429 Too Many Requests** HTTP status code. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.nansen.ai/getting-started/rate-limits.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.