> For the complete documentation index, see [llms.txt](https://docs.corppass.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.corppass.gov.sg/technical-specifications.md).

# Technical Specifications

- [Corppass Authorization API (FAPI 2.0)](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0.md)
- [Integration Guide](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide.md)
- [0. Well-known Endpoints](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/0.-well-known-endpoints.md)
- [OpenID Discovery Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/0.-well-known-endpoints/openid-discovery-endpoint.md)
- [JWKS Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/0.-well-known-endpoints/jwks-endpoint.md)
- [1. Pushed Authorization Request (PAR) Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/1.-pushed-authorization-request-par-endpoint.md)
- [Authentication Context Parameters](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/1.-pushed-authorization-request-par-endpoint/authentication-context-parameters.md)
- [2. Authorization Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/2.-authorization-endpoint.md)
- [3. Token Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/3.-token-endpoint.md)
- [ID Token](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/3.-token-endpoint/id-token.md)
- [Access Token](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/3.-token-endpoint/access-token.md)
- [4. Userinfo Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint.md)
- [Auth Info](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint/auth-info.md)
- [Third-party Auth Info](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint/third-party-auth-info.md)
- [Entity Info](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint/entity-info.md)
- [Person Info](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint/person-info.md)
- [Corppass Info](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/4.-userinfo-endpoint/corppass-info.md)
- [Supported TLS Cipher Suites](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/integration-guide/supported-tls-cipher-suites.md)
- [Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes.md)
- [Corppass Standard Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes/corppass-standard-scopes.md)
- [Myinfo Business Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes/myinfo-business-scopes.md)
- [Entity Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes/myinfo-business-scopes/entity-scopes.md)
- [Person Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes/myinfo-business-scopes/person-scopes.md)
- [Corppass Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/scopes/myinfo-business-scopes/corppass-scopes.md)
- [Migration Guides](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/migration-guides.md)
- [Migration Guide: Legacy to FAPI 2.0](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/migration-guides/migration-guide-legacy-to-fapi-2.0.md)
- [Migration Guide: Myinfo Business v1/v2 to v3 (FAPI 2.0)](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/migration-guides/migration-guide-myinfo-business-v1-v2-to-v3-fapi-2.0.md)
- [Changelog](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/changelog.md)
- [Myinfo Business Support](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/changelog/myinfo-business-support.md): May 18, 2026
- [Corppass Authorization API (FAPI 2.0) Launch](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-fapi-2.0/changelog/corppass-authorization-api-fapi-2.0-launch.md): February 23, 2026
- [Corppass Authorization API (Legacy)](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy.md)
- [Staging and Production URLs](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/staging-and-production-urls.md)
- [Endpoints](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints.md)
- [Authorization Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/authorization-endpoint.md)
- [Authorization Code with Proof Key of Code Exchange (PKCE) Flow](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/authorization-endpoint/authorization-code-with-proof-key-of-code-exchange-pkce-flow.md)
- [Token Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/token-endpoint.md)
- [ID Token Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/token-endpoint/id-token-structure.md)
- [UserInfo Claim Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/token-endpoint/id-token-structure/userinfo-claim-structure.md)
- [EntityInfo Claim Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/token-endpoint/id-token-structure/entityinfo-claim-structure.md)
- [Access Token Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/token-endpoint/access-token-structure.md)
- [Authorization Info Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/authorization-info-endpoint.md)
- [AuthInfo Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/authorization-info-endpoint/authinfo-structure.md)
- [TPAuthInfo Structure](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/authorization-info-endpoint/tpauthinfo-structure.md)
- [Well-known Endpoints](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/well-known-endpoints.md)
- [OpenID Discovery Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/well-known-endpoints/openid-discovery-endpoint.md)
- [JWKS Endpoint](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/endpoints/well-known-endpoints/jwks-endpoint.md)
- [Scopes](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/scopes.md)
- [Changelog](https://docs.corppass.gov.sg/technical-specifications/corppass-authorization-api-legacy/changelog.md)
- [Technical Concepts](https://docs.corppass.gov.sg/technical-specifications/technical-concepts.md)
- [Client JWKS](https://docs.corppass.gov.sg/technical-specifications/technical-concepts/client-jwks.md)
- [JWS and JWE](https://docs.corppass.gov.sg/technical-specifications/technical-concepts/jws-and-jwe.md)
- [Client Assertion JWT](https://docs.corppass.gov.sg/technical-specifications/technical-concepts/client-assertion-jwt.md)
- [Proof Key of Code Exchange (PKCE)](https://docs.corppass.gov.sg/technical-specifications/technical-concepts/proof-key-of-code-exchange-pkce.md)
- [Demonstrating Proof of Possession (DPoP)](https://docs.corppass.gov.sg/technical-specifications/technical-concepts/demonstrating-proof-of-possession-dpop.md)