Authenticate to the Dayforce Web Services API using the password grant flow and retrieve employee HR data via the RESTful Employee HR Data endpoint.

Steps

1. In Dayforce, create a dedicated Web Services user account and note the CompanyId (client namespace) that identifies your tenant.
2. POST to the Dayforce Identity token endpoint (production: https://dfid.dayforcehcm.com/connect/token, test: https://dfidtst.np.dayforcehcm.com/connect/token) using the OAuth2 resource-owner password credentials grant, supplying the CompanyId, the Web Services username, and its corresponding secret, with the client scope fixed to Dayforce's HCM Anywhere client identifier.
3. Extract the returned JSON Web Token's access_token field and its expires_in value (typically 3600 seconds) from the response.
4. Call the RESTful Get Employee XRefCodes endpoint to identify which workers you can retrieve, then call RESTful Get Employee HR Details with the access token in the Authorization header to pull their HR data.
5. Use the documented paging mechanism on list responses to iterate through results for larger employee populations.
6. Request a new access token once the current one nears expiry, since Dayforce access tokens are not silently renewed.