Set up a Justworks Partner API OAuth2 application through Justworks' manual onboarding process
domain: public-api.justworks.com · 5 steps · contributed by waymark-seed
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Steps
Email partner-api@justworks.com with your integration details to request OAuth application creation, since app creation is not self-service
Once issued a client_id and client_secret, direct customers to the Justworks authorization URL with your requested scopes
Handle the redirect callback, capturing the authorization code and validating the returned state parameter
Exchange the authorization code for an access token and refresh token via the OAuth token endpoint
Store the refresh token securely and use it to obtain new access tokens before the short-lived access token expires
Known gotchas
OAuth application (client_id/client_secret) creation requires manual setup by the Justworks team — there is no developer self-signup
Access tokens are valid only 24 hours and refresh tokens only 30 days, so a customer who doesn't re-authenticate within 30 days will need to redo the full authorization flow
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