---
title: Data API
description: Data API reference for InfluxDB Clustered.
url: https://docs.influxdata.com/influxdb3/clustered/api/data-api/
estimated_tokens: 732
product: InfluxDB Clustered
version: clustered
---

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

### [Quick start](/influxdb3/clustered/api/data-api/quick-start/)

Authenticate, write, and query with the InfluxDB 3 Clustered API.

### [API compatibility](/influxdb3/clustered/api/data-api/api-compatibility/)

### [Authentication](/influxdb3/clustered/api/data-api/authentication/)

Use one of the following schemes to authenticate to the InfluxDB 3 Clustered API:

### [Common parameters](/influxdb3/clustered/api/data-api/common-parameters/)

Most InfluxDB API endpoints require parameters in the request — for example, specifying the database to write to or query from.

### [Headers](/influxdb3/clustered/api/data-api/headers/)

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…

### [Response codes](/influxdb3/clustered/api/data-api/response-codes/)

InfluxDB 3 Clustered API endpoints return standard HTTP status codes.

### [System information endpoints](/influxdb3/clustered/api/data-api/system-information-endpoints/)

InfluxDB 3 Clustered provides system endpoints for checking instance availability and retrieving version information.

### [Usage](/influxdb3/clustered/api/data-api/usage/)

InfluxDB 3 Clustered tracks storage usage for your cluster. The Usage endpoints let you retrieve stored data size metrics to monitor capacity consumption.

### [Ping](/influxdb3/clustered/api/data-api/ping/)

Check the availability of an InfluxDB 3 Clustered instance.

### [Query data](/influxdb3/clustered/api/data-api/query-data/)

Query data stored in InfluxDB 3 Clustered using InfluxQL via the v1-compatible `/query` endpoint. Use Flight+gRPC for SQL or InfluxQL queries with Arrow format output.

### [Write data](/influxdb3/clustered/api/data-api/write-data/)

Write time series data to InfluxDB 3 Clustered databases using the v2-compatible `/api/v2/write` endpoint or the v1-compatible `/write` endpoint with line protocol.