# Upsert provider credentials (/api-reference/subscribers/upsert-provider-credentials)

Upsert credentials for a provider such as **slack** and **FCM**. 
      **providerId** is required field. This API creates **deviceTokens** or appends to the existing ones.

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<APIPage document={"content/openapi/novu-spec.json"} operations={[{"path":"/v1/subscribers/{subscriberId}/credentials","method":"patch"}]} webhooks={[]} hasHead={false} />