NTT Docomo

d ACCOUNT Connect

d ACCOUNT Connect (dアカウント・コネクト) is DOCOMO's carrier identity service for businesses, offering OpenID Connect based social login backed by network line authentication and device biometrics against roughly 90 million d ACCOUNT registrations and approximately 2,000 implemented sites. A live, anonymous OpenID Connect discovery document is served at https://conf.uw.docomo.ne.jp/.well-known/openid-configuration (HTTP 200, fetched 2026-07-25) declaring issuer https://conf.uw.docomo.ne.jp/, the authorization endpoint https://id.smt.docomo.ne.jp/cgi8/oidc/authorize, token and userinfo endpoints, pairwise subject identifiers, response_types of code only, and HS256/RS256 ID token signing. No backchannel authentication endpoint is advertised, so CIBA — the grant CAMARA specifies for network-based authorization — is not exposed here. The integration manual and technical specification are downloadable only after submitting a use application and passing DOCOMO's review; no OpenAPI definition is published.

GitHub

Documentation

📖
Documentation
https://id.smt.docomo.ne.jp/src/index_business.html
📖
APIReference
https://id.smt.docomo.ne.jp/src/dlogin/ctop_method.html
📖
GettingStarted
https://id.smt.docomo.ne.jp/src/dlogin/ctop_method.html
📖
Authentication
https://raw.githubusercontent.com/api-evangelist/ntt-docomo/refs/heads/main/authentication/ntt-docomo-authentication.yml

Other Resources

🔗
OpenIDConnectDiscovery
https://conf.uw.docomo.ne.jp/.well-known/openid-configuration
🔗
WellKnown
https://raw.githubusercontent.com/api-evangelist/ntt-docomo/refs/heads/main/well-known/ntt-docomo-well-known.yml
🔗
JWKS
https://raw.githubusercontent.com/api-evangelist/ntt-docomo/refs/heads/main/well-known/ntt-docomo-jwks.json
🔗
SignUp
https://g.daccount.docomo.ne.jp/VIEW_OC01/login4
🔗
StatusPage
https://id.smt.docomo.ne.jp/src/dac/maintenance-g.html
🔗
Support
https://id.smt.docomo.ne.jp/src/dlogin/ctop_method_form.html
🔗
TermsOfService
https://id.smt.docomo.ne.jp/src/utility/rules.html
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/ntt-docomo/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: ntt-docomo:d-account-connect
name: d ACCOUNT Connect
description: d ACCOUNT Connect (dアカウント・コネクト) is DOCOMO's carrier identity service for businesses, offering
  OpenID Connect based social login backed by network line authentication and device biometrics against
  roughly 90 million d ACCOUNT registrations and approximately 2,000 implemented sites. A live, anonymous
  OpenID Connect discovery document is served at https://conf.uw.docomo.ne.jp/.well-known/openid-configuration
  (HTTP 200, fetched 2026-07-25) declaring issuer https://conf.uw.docomo.ne.jp/, the authorization endpoint
  https://id.smt.docomo.ne.jp/cgi8/oidc/authorize, token and userinfo endpoints, pairwise subject identifiers,
  response_types of code only, and HS256/RS256 ID token signing. No backchannel authentication endpoint
  is advertised, so CIBA — the grant CAMARA specifies for network-based authorization — is not exposed
  here. The integration manual and technical specification are downloadable only after submitting a use
  application and passing DOCOMO's review; no OpenAPI definition is published.
humanURL: https://id.smt.docomo.ne.jp/src/index_business.html
baseURL: https://conf.uw.docomo.ne.jp/
tags:
- Identity
- OpenID Connect
- Authentication
- Carrier Identity
- Partner Gated
properties:
- type: Documentation
  url: https://id.smt.docomo.ne.jp/src/index_business.html
- type: APIReference
  url: https://id.smt.docomo.ne.jp/src/dlogin/ctop_method.html
- type: GettingStarted
  url: https://id.smt.docomo.ne.jp/src/dlogin/ctop_method.html
- type: OpenIDConnectDiscovery
  url: https://conf.uw.docomo.ne.jp/.well-known/openid-configuration
- type: Authentication
  url: authentication/ntt-docomo-authentication.yml
- type: WellKnown
  url: well-known/ntt-docomo-well-known.yml
- type: JWKS
  url: well-known/ntt-docomo-jwks.json
- type: SignUp
  url: https://g.daccount.docomo.ne.jp/VIEW_OC01/login4
- type: StatusPage
  url: https://id.smt.docomo.ne.jp/src/dac/maintenance-g.html
- type: Support
  url: https://id.smt.docomo.ne.jp/src/dlogin/ctop_method_form.html
- type: TermsOfService
  url: https://id.smt.docomo.ne.jp/src/utility/rules.html