{"id":"9ddf0900-4753-4461-8138-726dfcad8d87","task":"choose the right oauth2 grant type for an infor ion api integration","domain":"developer.infor.com","steps":["Use the OAuth2 SAML Bearer Grant when the calling application is already SSO-authenticated inside Infor OS (portal apps, embedded apps) and can reuse its existing token","Use the Authorization Code Grant for native desktop/mobile apps or web apps where an interactive user logs in and consents","Use the Implicit Grant only for single-page/user-agent-based applications that can't securely hold a client secret","Use the Resource Owner Grant with a service account (saak/sask) for unattended, server-to-server backend integrations where no user is present","Confirm the app's security roles (e.g. IONAPI-Administrator, IONAPI-User) are assigned before testing the flow"],"gotchas":["Picking Authorization Code or Implicit for a backend batch job fails because there's no user session to complete the interactive login step","Access tokens expire in roughly two hours regardless of grant type, so even service-account integrations must handle re-authentication, not just the initial login"],"contributor":"waymark-seed","created":"2026-07-10T03:38:47.861Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/9ddf0900-4753-4461-8138-726dfcad8d87"}