# Overview

### Request and Response Formats

IntServ Access API is RPC-based. In general, requests uses HTTP POST and the JSON data format for request and response payloads. Requests is authorized using the `Authorization` header and an access token (see the [Authentication](/basics/authentication.md) section for more details).

### Date and Time Format

Date and time is always expressed in UTC, formatted according to ISO 8601, if nothing else is explicitly stated in the endpoint documentation.

Example: `2020-01-01T12:30:00Z`

### Summary of API Specifications

|                   |                  |
| ----------------- | ---------------- |
| Content type      | application/json |
| Encoding          | UTF-8            |
| Protocol / Scheme | HTTPS / TLS 1.2  |
| Date Time Format  | ISO 8601         |
|                   |                  |


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