UGM ID — OAuth 2.0 / OpenID Connect Authorization Server
Universitas Gadjah Mada's own identity API, operated by the Directorate of Information Technology (DTI) at oauth.simaster.ugm.ac.id, in front of SIMASTER, the university's integrated academic information system. UGM publishes an OpenAPI 3.1.0 document for it at /openapi.json (retrieved 2026-09-01, 200, 19677 bytes) and serves Swagger UI from /docs. Twenty operations across five tags: the OAuth2 core (authorize, token, introspect, revoke, logout, userinfo), Discovery (OIDC configuration, RFC 8414 metadata, JWKS), three read-only resource endpoints (/api/me, /user/me, /user/username/{username}), social login initiation for Google, Microsoft 365, Facebook, LinkedIn and Apple, and a public /health check that reports the status of its database, Redis and SIMASTER dependencies. Six grant types including PKCE-protected authorization_code and RFC 8693 token exchange. Five scopes, all read-only. The specification is written by UGM in Indonesian. Two real defects are recorded rather than smoothed over: both discovery documents emit scheme-less URLs, breaking OIDC Discovery and RFC 8414 conformance, and the JWKS endpoint returns an empty key set while advertising RS256 id_tokens.
UGM ID — OAuth 2.0 / OpenID Connect Authorization Server is one of 8 APIs that Gadjah Mada University publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 1 JSON Schema definition.
Tagged areas include Identity, Authentication, OAuth, OpenID Connect, and SSO. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, API documentation, authentication docs, a status page, and 1 JSON Schema.
This API exposes 19 operations across 19 paths, organized into 5 resource areas, and defines 8 schemas. It is described by OpenAPI 3.1.0, at version 2.0.
Requests are made against 2 base URLs: https://oauth.simaster.ugm.ac.id, https://oauth.dev.ugm.ac.id.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 2
UGM ID — OAuth 2.0 / OpenID Connect Authorization Server declares
2 security schemes
for authenticating requests.
It accepts HTTP basic authentication (BasicAuth).
It accepts HTTP bearer tokens (JWT) (BearerAuth).
BasicAuth— clientid:clientsecret via Basic Auth headerBearerAuth— Access token JWT dari /oauth/token
Paths & Operations 19
Across 19 paths, the API surfaces 19 operations — 15 GET, 4 POST. They span 5 resource areas: Discovery, API, Social Login, Infra, OAuth2. Each is listed below with its method, path, parameters, and response codes.
RFC 8414 & OIDC Discovery
Resource API (butuh Bearer token)
Social provider login (Google, Microsoft, Facebook, LinkedIn)
Health check & infrastruktur
Endpoint inti OAuth2/OIDC
Schemas 8
The contract defines 8 schemas that model the data the API accepts and returns. The most detailed are ServerMetadata (13 properties), UserDetailData (12 properties), IntrospectResponse (10 properties), UserInfoResponse (8 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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Other APIs Gadjah Mada University publishes across the network.
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