> ## Documentation Index
> Fetch the complete documentation index at: https://coincapapi.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Codes and Error Responses

> The CoinCap API uses standard HTTP status codes to indicate the success or failure of your requests.

### Success (200 OK):

* The request was successful, and the response contains the requested data.

### Client Errors (400-417):

* 400 Bad Request: Your request is malformed or missing required parameters.
* 401 Unauthorized: You did not provide a valid API key.
* 404 Not Found: The requested resource does not exist.
* 429 Too Many Requests: You have exceeded the rate limit.

### Common Client Errors:

* limit exceeds 2000: Your request exceeds the maximum allowed number of results (2000). Reduce the limit.
* missing exchange: You need to specify the exchange in your request.
* missing interval: Include an interval parameter such as m1, h1, or d1.

### Server Errors (500-505):

* 500 Internal Server Error: Something went wrong on CoinCap's end. Please try again later.
* 503 Service Unavailable: The service is temporarily down for maintenance.