The InfluxDB v2 API includes InfluxDB 1.x compatibility endpoints that work with
InfluxDB 1.x client libraries and third-party integrations like [Grafana](https://grafana.com) and others.

<a class="btn" href="/influxdb/version/api/v1-compatibility/">View full v1 compatibility API documentation</a>

## Authentication

InfluxDB 1.x compatibility endpoints require all query and write requests to be authenticated with an
[API token](/influxdb/version/admin/tokens/) or v1-compatible
credentials.

> [!Important]
> #### Authenticate with an API token or 1.x-compatible credentials
> You can't use an InfluxDB 2.x username and password to authenticate with the InfluxDB 1.x compatibility API.

- [Authenticate with the Token scheme](#authenticate-with-the-token-scheme)
- [Authenticate with a 1.x username and password scheme](#authenticate-with-a-username-and-password-scheme)
- [Troubleshoot authentication issues](#troubleshoot-authentication-issues)

### Authenticate with the Token scheme
Token authentication requires the following credential:

- **token**: InfluxDB [API token](/influxdb/version/admin/tokens/)

Use the `Authorization` header with the `Token` scheme to provide your token to InfluxDB.
The `Token` scheme is the word `Token`, a space, and your token (all case-sensitive).

#### Syntax

```http
Authorization: Token INFLUX_API_TOKEN
```

#### Example

{{< code-tabs-wrapper >}}
{{% code-tabs %}}
[curl](#curl)
[Node.js](#nodejs)
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<!--pytest.mark.skip-->

```sh
{{% get-shared-text "api/v1-compat/auth/oss/token-auth.sh" %}}
```
{{% /code-tab-content %}}
{{% code-tab-content %}}
```js
{{% get-shared-text "api/v1-compat/auth/oss/token-auth.js" %}}
```
{{% /code-tab-content %}}
{{< /code-tabs-wrapper >}}

### Authenticate with a username and password scheme

Use the following authentication schemes with clients that support the InfluxDB 1.x convention of `username` and `password` (that don't support the `Authorization: Token` scheme):

- [Basic authentication](#basic-authentication)
- [Query string authentication](#query-string-authentication)

#### Manage credentials

{{% show-in "v2" %}}

Username and password schemes require the following credentials:
- **username**: 1.x username (this is separate from the UI login username)
- **password**: 1.x password or InfluxDB API token.

{{% note %}}
#### Password or Token

If you have [set a password](/influxdb/version/install/upgrade/v1-to-v2/manual-upgrade/#1x-compatible-authorizations) for the v1-compatible username, provide the v1-compatible password.
If you haven't set a password for the v1-compatible username, provide the InfluxDB [authentication token](/influxdb/version/admin/tokens/) as the password.
{{% /note %}}

For more information, see how to create and manage
[v1-compatible authorizations](/influxdb/version/install/upgrade/v1-to-v2/manual-upgrade/#1x-compatible-authorizations)
when manually upgrading from InfluxDB v1 to v2.

{{% /show-in %}}

{{% show-in "cloud,cloud-serverless" %}}

- **username**: InfluxDB Cloud username
  (Use the email address you signed up with as your username--for example, `exampleuser@influxdata.com`.)
- **password**: InfluxDB Cloud [API token](/influxdb/cloud/admin/tokens/)

{{% /show-in %}}

#### Basic authentication

Use the `Authorization` header with the `Basic` scheme to provide username and
password credentials to InfluxDB.

{{% api/v1-compat/basic-auth-syntax %}}

##### Syntax

{{% show-in "v2" %}}

```http
Authorization: Basic INFLUX_USERNAME:INFLUX_PASSWORD_OR_TOKEN
```

{{% /show-in %}}


{{% show-in "cloud,cloud-serverless" %}}

```http
Authorization: Basic exampleuser@influxdata.com:INFLUX_API_TOKEN
```

{{% /show-in %}}

##### Example

{{% code-placeholders "INFLUX_(USERNAME|PASSWORD_OR_TOKEN|API_TOKEN)|exampleuser@influxdata.com" %}}

{{% show-in "v2" %}}

{{< code-tabs-wrapper >}}
{{% code-tabs %}}
[curl](#curl)
[Node.js](#nodejs)
{{% /code-tabs %}}
{{% code-tab-content %}}

<!--pytest.mark.skip-->

```sh
{{% get-shared-text "api/v1-compat/auth/oss/basic-auth.sh" %}}
```
{{% /code-tab-content %}}
{{% code-tab-content %}}
```js
{{% get-shared-text "api/v1-compat/auth/oss/basic-auth.js" %}}
```
{{% /code-tab-content %}}
{{< /code-tabs-wrapper >}}

{{% /show-in %}}


{{% show-in "cloud,cloud-serverless" %}}

{{< code-tabs-wrapper >}}
{{% code-tabs %}}
[curl](#curl)
[Node.js](#nodejs)
{{% /code-tabs %}}
{{% code-tab-content %}}

<!--pytest.mark.skip-->

```sh
{{% get-shared-text "api/v1-compat/auth/cloud/basic-auth.sh" %}}
```
{{% /code-tab-content %}}

{{% code-tab-content %}}
```js
{{% get-shared-text "api/v1-compat/auth/cloud/basic-auth.js" %}}
```
{{% /code-tab-content %}}
{{< /code-tabs-wrapper >}}

Replace the following:
- {{% code-placeholder-key %}}`exampleuser@influxdata.com`{{% /code-placeholder-key %}}: the email address that you signed up with
- {{% code-placeholder-key %}}`INFLUX_API_TOKEN`{{% /code-placeholder-key %}}: your [InfluxDB API token](/influxdb/cloud/reference/glossary/#token)

{{% /show-in %}}

#### Query string authentication
Use InfluxDB 1.x API parameters to provide credentials through the query string.

{{% note %}}
##### Consider when using query string parameters

- URL-encode query parameters that may contain whitespace or other special characters.
- Be aware of the [risks](https://owasp.org/www-community/vulnerabilities/Information_exposure_through_query_strings_in_url) when exposing sensitive data through URLs.
{{% /note %}}

##### Syntax

{{% show-in "v2" %}}

```http
 /query/?u=INFLUX_USERNAME&p=INFLUX_PASSWORD_OR_TOKEN
 /write/?u=INFLUX_USERNAME&p=INFLUX_PASSWORD_OR_TOKEN
 ```

{{% /show-in %}}

{{% show-in "cloud,cloud-serverless" %}}

```http
/query/?u=INFLUX_USERNAME&p=INFLUX_API_TOKEN
/write/?u=INFLUX_USERNAME&p=INFLUX_API_TOKEN
```

{{% /show-in %}}

##### Example

{{% show-in "v2" %}}
{{< code-tabs-wrapper >}}
{{% code-tabs %}}
[curl](#curl)
[Node.js](#nodejs)
{{% /code-tabs %}}
{{% code-tab-content %}}

<!--pytest.mark.skip-->

```sh
{{< get-shared-text "api/v1-compat/auth/oss/querystring-auth.sh" >}}
```
{{% /code-tab-content %}}
{{% code-tab-content %}}
```js
{{< get-shared-text "api/v1-compat/auth/oss/querystring-auth.js" >}}
```
{{% /code-tab-content %}}
{{< /code-tabs-wrapper >}}

Replace the following:
- {{% code-placeholder-key %}}`INFLUX_USERNAME`{{% /code-placeholder-key %}}: [InfluxDB 1.x username](#manage-credentials)
- {{% code-placeholder-key %}}`INFLUX_PASSWORD_OR_TOKEN`{{% /code-placeholder-key %}}: [InfluxDB 1.x password or InfluxDB API token](#manage-credentials)

{{% /show-in %}}

{{% show-in "cloud,cloud-serverless" %}}

{{< code-tabs-wrapper >}}
{{% code-tabs %}}
[curl](#curl)
[Node.js](#nodejs)
{{% /code-tabs %}}
{{% code-tab-content %}}

<!--pytest.mark.skip-->

```sh
{{% get-shared-text "api/v1-compat/auth/cloud/basic-auth.sh" %}}
```
{{% /code-tab-content %}}

{{% code-tab-content %}}
```js
{{% get-shared-text "api/v1-compat/auth/cloud/basic-auth.js" %}}
```
{{% /code-tab-content %}}
{{< /code-tabs-wrapper >}}

{{% /code-placeholders %}}

Replace the following:
- {{% code-placeholder-key %}}`exampleuser@influxdata.com`{{% /code-placeholder-key %}}: the email address that you signed up with
- {{% code-placeholder-key %}}`INFLUX_API_TOKEN`{{% /code-placeholder-key %}}: your [InfluxDB API token](/influxdb/cloud/reference/glossary/#token)

{{% /show-in %}}

### Troubleshoot authentication issues

#### Unauthorized when using the initial username and password

You can't use the InfluxDB 2.x username and password to authenticate with the InfluxDB 1.x compatibility API.
For example, given the following Docker Compose configuration: 

```yaml
# Docker compose example
  influx2:
    image: influxdb:2.4.0
    volumes:
      - ./dev/influxdb2:/var/lib/influxdb2
    ports:
      - "8086:8086"
    environment:
      DOCKER_INFLUXDB_INIT_USERNAME: dev
      DOCKER_INFLUXDB_INIT_PASSWORD: 12345678
      DOCKER_INFLUXDB_INIT_ORG: com.some
      DOCKER_INFLUXDB_INIT_BUCKET: m2_dev
      DOCKER_INFLUXDB_INIT_MODE: setup
```

The following query using the v1 `/query` endpoint and v2 initial username and password returns an `unauthorized` error:

```bash
# Using the initial username and password
curl --get "http://localhost:8086/query" \
    --data-urlencode "u=dev" \
    --data-urlencode "p=12345678" \
    --data-urlencode "db=m2_dev" \
    --data-urlencode "q=SELECT * FROM default"
```

Instead, [authenticate with a token](#authenticate-with-the-token-scheme) or a [1.x username and password scheme](#authenticate-with-a-username-and-password-scheme).


## InfluxQL support

The compatibility API supports InfluxQL, with the following caveats:

- The `INTO` clause (for example, `SELECT ... INTO ...`) is not supported.
- With the exception of [`DELETE`](/influxdb/v1/query_language/manage-database/#delete-series-with-delete) and
  [`DROP MEASUREMENT`](/influxdb/v1/query_language/manage-database/#delete-measurements-with-drop-measurement) queries, which are still allowed,
  InfluxQL database management commands are not supported.

## Compatibility endpoints

{{< children readmore=true >}}