Simon Audience API is an optional premium feature.

Contact your account manager to get started.

Leverage Simon’s contact profiles to power a more targeted, personalized experience everywhere you already reach your customers.

Through the use of contact profile data, marketers can retrieve a user's information, like a contact’s name, campaigns received, journey membership — and more — to customize the content provided to that user. This information can be used to power one-off experiences or to power your personalization service. Some examples include:

  • Use the Audience API to personalize the content or product recommendations served to a customer based on unique customer profile information (i.e. total spend, location, or last purchase date)
  • Enable a customer service or front-of-house staff member to have better context on a customer by embedding customer profile information in your internal tools


The Audience API uses Bearer Authentication, or token authentication, to manage access. To request a bearer token, contact your Client Solutions Manager. The bearer token should be provided in the header of each request, e.g.

-H "Authorization: Bearer <YOUR TOKEN>"

Best practices

  • We recommend you access Simon's Audience API from server side applications only, not client side applications. We recommend you create a personalization service in your infrastructure, that other apps, websites, and services can communicate with to fetch personalizations about their users.
  • We recommend you keep a small pool of valid tokens, eliminating in a rolling window.
    • Please submit a support ticket to have a token rotated or deleted, however avoid sending any tokens via email or slack to ensure they stay secure - you can reference them by their last 3 digits, or the email used to create them.
  • We recommend you store your token in a password manager or secrets store; like 1Password or Vault to keep your tokens safe because you need to keep your tokens private, not in your publicly visible client code.

Make a Request

Once you have received your bearer token, make a test request to the API to confirm that everything is up and running. In the script below, replace <YOUR_BEARER_TOKEN> with the token received, and replace <CONTACT_EMAIL_ADDRESS> with the email of a contact in your Simon account that you'd like to fetch.

curl -X GET -H 'Accept: application/json' -H "Authorization: Bearer <YOUR_API_TOKEN>" '<CONTACT_EMAIL_ADDRESS>'

The Contact Object

A successful response contains a Contact object, with key-value pairs containing the contact's properties. It's important to note that only one Contact object can be returned at a time. The keys available in the response are based on the fields configured within your Simon account. In order for a field to appear in the API response, it must be configured as "content" in your Simon account. To read more about content fields, see here.

  "email_address": "[email protected]",
  "first_name": "Tom",
  "address_city": "New York",
  "address_state": "NY",
  "flow_variant_membership": [
    "203850-Variant A",
  "total_lifetime_value_jde": "$241.56"


Simon uses conventional HTTP response codes to indicate the success or failure of an API request. For example, a 404 would indicate that the requested customer identifier does not exist. See more on the endpoint reference.

200OKRequest sent successfully
400Bad RequestThis may occur because the requested contact does not exist.
429Rate LimitedRequest frequency too high. See Rate Limit for more details.
500Server ErrorThe request was not completed due to an internal server error.

Rate Limit

There is a limit of 50 requests/second that is applied across all requests made by your organization. This means that the rate limit will apply to all requests coming from your organization, even if they are issued with separate bearer tokens. If you need a rate limit increase, please contact your account manager with your request and use case details.