---
title: Quick start
description: 'Authenticate, write, and query with the InfluxDB 3 Clustered API. Prerequisites: A database token with write permission for the target database. Use the Management API or influxctl to create tokens before writing data. Check that the instance is available. curl "https://cluster-host.example.com/ping"A 204 No Content response indicates the querier is available. Write data to InfluxDB. curl "https://cluster-host.example.com/api/v2/write?bucket=sensors&precision=ns" \ --header "Authorization: Beare'
url: https://docs.influxdata.com/influxdb3/clustered/api/data-api/quick-start/
estimated_tokens: 829
product: InfluxDB Clustered
version: clustered
---

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

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

**Prerequisites**: A database token with write permission for the target database. Use the Management API or `influxctl` to create tokens before writing data.

1. Check that the instance is available.
    
    ```bash
    curl "https://cluster-host.example.com/ping"
    ```
    
    A `204 No Content` response indicates the querier is available.
    
2. Write data to InfluxDB.
    
    ```bash
    curl "https://cluster-host.example.com/api/v2/write?bucket=sensors&precision=ns" \
      --header "Authorization: Bearer DATABASE_TOKEN" \
      --header "Content-Type: text/plain; charset=utf-8" \
      --data-raw "home,room=Kitchen temp=72.0
    home,room=Living\ room temp=71.5"
    ```
    
    If all data is written, the response is `204 No Content`.
    
3. Query data from InfluxDB using InfluxQL.
    
    ```bash
    curl "https://cluster-host.example.com/query" \
      --get \
      --header "Authorization: Bearer DATABASE_TOKEN" \
      --data-urlencode "db=sensors" \
      --data-urlencode "q=SELECT * FROM home WHERE room='Living room'" \
      --data-urlencode "epoch=ns"
    ```
    

For SQL queries and Arrow-format output, use the Flight+gRPC protocol. For more information, see the [get started](/influxdb3/clustered/get-started/) guide.