Authentication

Step 1: Generate API Credentials

Generate a client ID and client secret from your Avalara1099 account: Your Profile → API.

Step 2: Get an Identity Token

Send a POST request to the Identity Token URL with your client ID and client secret from Step 1 as form-encoded parameters:

POST https://identity.avalara.com/connect/token
Content-Type: application/x-www-form-urlencoded

grant_type=client_credentials
client_id=<your client ID>
client_secret=<your client secret>

Body parameters

| Parameter | Value | | :--- | :--- | | grant_type | Always client_credentials | | client_id | Your client ID from Step 1 | | client_secret | Your client secret from Step 1 |

Successful response

{
  "access_token": "eyJhbGci...",
  "expires_in": 3600,
  "token_type": "Bearer"
}

Use the access_token as a bearer token in the Authorization header on every A1099 API request:

Authorization: Bearer <access_token>

For more on authenticating requests, see the A1099 authentication guide.

Environments

| Environment | Avalara 1099 API URL | Identity Token URL | | :--- | :--- | :--- | | Production | https://api.avalara.com/avalara1099 | https://identity.avalara.com/connect/token | | Sandbox | https://api.sbx.avalara.com/avalara1099 | https://ai-sbx.avlr.sh/connect/token |

API & SDK Documentation

Avalara 1099 API Reference

Avalara SDKs

Swagger