> For the complete documentation index, see [llms.txt](https://docs.eseye.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eseye.com/api-reference/authentication/request-access-token.md).

# Request access token

Return an OAuth 2.0 bearer token for an API service account.

Tokens are issued using the client credentials grant, which authenticates your service account rather than an individual user.

## Request a token

> Exchange your Base64-encoded service account credentials for an OAuth2 access token.

```json
{"openapi":"3.1.0","info":{"title":"Authentication","version":"1.0.0"},"tags":[{"name":"Authentication","description":"Tokens are issued using the client credentials grant, which authenticates your service account rather than an individual user.\n\nFor a step-by-step walkthrough, see [Generate a bearer token](generate-a-bearer-token)."}],"servers":[{"url":"https://eseye-idp-{env}.auth.{region}.amazoncognito.com","description":"Eseye identity provider","variables":{"env":{"default":"prod","enum":["qan","stage","prod"],"description":"The environment you are working in."},"region":{"default":"eu-west-1","description":"The AWS region your OAuth service is hosted in, for example `eu-west-1` or `us-east-1`."}}}],"paths":{"/oauth2/token":{"post":{"summary":"Request a token","operationId":"get-token","tags":["Authentication"],"description":"Exchange your Base64-encoded service account credentials for an OAuth2 access token.","requestBody":{"required":true,"content":{"application/x-www-form-urlencoded":{"schema":{"type":"object","required":["grant_type","scope"],"properties":{"grant_type":{"type":"string","description":"The OAuth2 grant type. Always `client_credentials`, because your service account authenticates as itself rather than on behalf of a user."},"scope":{"type":"string","description":"The scope of the access token. Always `api/api`."}}}}}},"responses":{"200":{"description":"An access token was issued.","content":{"application/json":{"schema":{"type":"object","required":["access_token","token_type","expires_in"],"properties":{"access_token":{"type":"string","description":"The bearer token to send on every API request."},"token_type":{"type":"string","description":"The type of token issued."},"expires_in":{"type":"integer","description":"The lifetime of the token in seconds. Tokens are issued with a lifetime of one hour."}}}}}},"400":{"description":"The request was rejected. `invalid_client` means the credentials in the `Authorization` header were not accepted.","content":{"application/json":{"schema":{"type":"object","properties":{"error":{"type":"string","description":"The reason the request was rejected."}}}}}}},"parameters":[{"name":"Authorization","in":"header","required":true,"description":"Enter `Basic`, a space, and your Base64-encoded `ClientID:ClientSecret` (the only value you need to edit).","schema":{"type":"string","default":"Basic <Base64Encoded(ClientID:ClientSecret)>"}}]}}}}
```

Returns an OAuth 2.0 bearer token for an API service account.

```http
POST /oauth2/token
```

### Endpoint

```
https://eseye-idp-prod.auth.<region>.amazoncognito.com/oauth2/token
```

Replace `<region>` with the AWS region Eseye provided.

### Request headers

| Header          | Value                               | Required |
| --------------- | ----------------------------------- | -------- |
| `Authorization` | `Basic <credentials>`               | Yes      |
| `Content-Type`  | `application/x-www-form-urlencoded` | Yes      |

`<credentials>` is the Base64-encoded form of `<client-id>:<client-secret>`.

### Form parameters

| Parameter    | Value                | Required | Description                        |
| ------------ | -------------------- | -------- | ---------------------------------- |
| `grant_type` | `client_credentials` | Yes      | Authenticates the service account. |
| `scope`      | `api/api`            | Yes      | Requests Eseye API access.         |

### Example request

```bash
curl --request POST \
  --url "https://eseye-idp-prod.auth.eu-west-1.amazoncognito.com/oauth2/token" \
  --user "${ESEYE_CLIENT_ID}:${ESEYE_CLIENT_SECRET}" \
  --header "Content-Type: application/x-www-form-urlencoded" \
  --data-urlencode "grant_type=client_credentials" \
  --data-urlencode "scope=api/api"
```

### Successful response

An accepted request returns HTTP `200`:

```json
{
  "access_token": "eyJraWQiOiJhYmMxMjMiLCJhbGciOiJSUzI1NiJ9...",
  "token_type": "Bearer",
  "expires_in": 3600
}
```

Reuse the token until it expires, then request another token.

### Error response

The endpoint returns HTTP `400` when it rejects a request. An `invalid_client` error means the credentials were not accepted.


---

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