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

# Requests and Responses

When making a `POST` request to the API, use a `Content-Type` of `application/json` and specify parameters via JSON in the request body:

When making a `GET` request to the API, you should specify parameters in the query string of the URL. Join nested parameters, such as timestamp-based filters, with a `.` – for example, `created_at.before`:

All responses from the API will have a `Content-Type` of `application/json`.

### Request IDs

Each API request has an associated request identifier. You can find this value in the response headers, under **`request_id`**. You can also find request identifiers in the individual request logs in your Dashboard.

To expedite the resolution process, provide the request identifier when you contact us about a specific request.