---
title: Headers
description: InfluxDB HTTP API endpoints use standard HTTP request and response headers. The following table shows common headers used by many InfluxDB 3 Clustered API endpoints. Some endpoints use additional headers specific to their function — for example, write endpoints accept Content-Encoding to indicate that line protocol is compressed in the request body. Header Value type Description Accept string The content type that the client can understand. Authorization string The authorization scheme and crede
url: https://docs.influxdata.com/influxdb3/clustered/api/data-api/headers/
estimated_tokens: 467
product: InfluxDB Clustered
version: clustered
---

[Download Clustered Data API Spec](/openapi/influxdb-clustered-data-api.yml)

InfluxDB HTTP API endpoints use standard HTTP request and response headers. The following table shows common headers used by many InfluxDB 3 Clustered API endpoints. Some endpoints use additional headers specific to their function — for example, write endpoints accept `Content-Encoding` to indicate that line protocol is compressed in the request body.

| Header | Value type | Description |
| --- | --- | --- |
| Accept | string | The content type that the client can understand. |
| Authorization | string | The authorization scheme and credential. |
| Content-Length | integer | The size of the entity-body, in bytes. |
| Content-Type | string | The format of the data in the request body. |