docs-v2/content/shared/influxdb-v2/query-data/execute-queries/influx-api.md

The InfluxDB v2 API provides a programmatic interface for all interactions with InfluxDB. To query InfluxDB {{< current-version >}}, do one of the following:

• Send a Flux query request to the /api/v2/query endpoint.
• Send an InfluxQL query request to the /query 1.x compatibility API.

In your request, set the following:

• Your organization via the org or orgID URL parameters.
• Authorization header to Token + your API token.
• Accept header to application/csv.
• Content-type header to application/vnd.flux (Flux only) or application/json (Flux or InfluxQL).
• Query in Flux or InfluxQL with the request's raw data.

{{% note %}}

Use gzip to compress the query response

To compress the query response, set the Accept-Encoding header to gzip. This saves network bandwidth, but increases server-side load.

We recommend only using gzip compression on responses that are larger than 1.4 KB. If the response is smaller than 1.4 KB, gzip encoding will always return a 1.4 KB response, despite the uncompressed response size. 1500 bytes (~1.4 KB) is the maximum transmission unit (MTU) size for the public network and is the largest packet size allowed at the network layer. {{% /note %}}

Flux - Example query request

Below is an example curl request that sends a Flux query to InfluxDB {{< current-version >}}:

{{< code-tabs-wrapper >}} {{% code-tabs %}} Without compression With compression {{% /code-tabs %}}

{{% code-tab-content %}}

curl --request POST \
  http://localhost:8086/api/v2/query?orgID=INFLUX_ORG_ID  \
  --header 'Authorization: Token INFLUX_TOKEN' \
  --header 'Accept: application/csv' \
  --header 'Content-type: application/vnd.flux' \
  --data 'from(bucket:"example-bucket")
        |> range(start: -12h)
        |> filter(fn: (r) => r._measurement == "example-measurement")
        |> aggregateWindow(every: 1h, fn: mean)'

{{% /code-tab-content %}}

{{% code-tab-content %}}

curl --request POST \
  http://localhost:8086/api/v2/query?orgID=INFLUX_ORG_ID \
  --header 'Authorization: Token INFLUX_TOKEN' \
  --header 'Accept: application/csv' \
  --header 'Content-type: application/vnd.flux' \
  --header 'Accept-Encoding: gzip' \
  --data 'from(bucket:"example-bucket")
        |> range(start: -12h)
        |> filter(fn: (r) => r._measurement == "example-measurement")
        |> aggregateWindow(every: 1h, fn: mean)'

{{% /code-tab-content %}} {{< /code-tabs-wrapper >}}

InfluxQL - Example query request

Below is an example curl request that sends an InfluxQL query to InfluxDB {{< current-version >}}:

{{< code-tabs-wrapper >}} {{% code-tabs %}} Without compression With compression {{% /code-tabs %}}

{{% code-tab-content %}}

curl --request -G http://localhost:8086/query?orgID=INFLUX_ORG_ID&database=MyDB&retention_policy=MyRP \
  --header 'Authorization: Token INFLUX_TOKEN' \
  --header 'Accept: application/csv' \
  --header 'Content-type: application/json' \
  --data-urlencode "q=SELECT used_percent FROM example-db.example-rp.example-measurement WHERE host=host1"

{{% /code-tab-content %}}

{{% code-tab-content %}}

curl --request -G http://localhost:8086/query?orgID=INFLUX_ORG_ID&database=MyDB&retention_policy=MyRP \
  --header 'Authorization: Token INFLUX_TOKEN' \
  --header 'Accept: application/csv' \
  --header 'Content-type: application/json' \
  --header 'Accept-Encoding: gzip' \
  --data-urlencode "q=SELECT used_percent FROM example-db.example-rp.example-measurement WHERE host=host1"

{{% /code-tab-content %}} {{< /code-tabs-wrapper >}}

InfluxDB returns the query results in annotated CSV.