aid: ntt-docomo url: https://raw.githubusercontent.com/api-evangelist/ntt-docomo/refs/heads/main/apis.yml name: NTT Docomo kind: company description: >- NTT DOCOMO, Inc. is Japan's largest mobile network operator and a wholly owned subsidiary of Nippon Telegraph and Telephone (NTT), serving roughly 90 million mobile subscriptions in its home market of Japan across the docomo, ahamo and irumo brands, alongside the d ACCOUNT identity, d POINT loyalty, d Payment wallet and Lemino media franchises. In the telecom value chain DOCOMO is a facilities-based incumbent carrier — it owns the 5G radio, core and subscriber identity — but it does not sell that capability to developers directly. Its API posture is partner-gated and sales-led: the first-party "docomo Developer support" programme launched in 2013 was shut down on 31 March 2021 and its host no longer resolves, no developer, developers, docs, api or opengateway subdomain exists on docomo.ne.jp, and the only surviving public developer page documents handset and content technical information rather than any HTTP API. DOCOMO's network APIs reach developers only through aggregation: the company participates in the GSMA Open Gateway initiative and signed a distribution partnership with Aduna, the Ericsson-and-carrier joint venture, on 29 January 2026 to expose CAMARA Number Verification and SIM Swap for international markets — a commitment announced in press releases, with nothing callable published first-party as of this profile. Enterprise and wholesale API traffic is redirected to sibling company NTT DOCOMO BUSINESS on a separate domain. image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg tags: - Telecommunications - Japan - Mobile Network Operator - Network APIs - CAMARA - Open Gateway - Aduna - Carrier Identity - SIM Swap - Number Verification - Carrier Billing - 5G - Partner Gated created: '2026-07-25' modified: '2026-07-25' specificationVersion: '0.19' apis: - 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 - aid: ntt-docomo:docomo-mail-imap-interface name: docomo Mail IMAP Interface description: >- The docomo Mail IMAP interface is the one machine-interface specification NTT DOCOMO publishes openly, without registration, to third-party developers. It documents how a mail client connects to the docomo Mail service over IMAP, and is distributed as a 96-page Japanese PDF specification (mail_imap_spec_260126.pdf, HTTP 200, application/pdf, 1,229,737 bytes, edition 4.5 dated 2026-01-26, first edition 2013-12-19). This is an IMAP protocol interface, not an HTTP API: there is no REST surface, no OpenAPI definition, no API key issuance and no sandbox associated with it. The specification is complete and unredacted — it names the two production endpoints (imap.spmode.ne.jp and imap2.spmode.ne.jp, both on port 993), pins TLS 1.2 with an explicit allow-list of ten cipher suites and a 2048-bit public key, authenticates with d ACCOUNT ID and password, and specifies 31 IMAP commands including IDLE, NAMESPACE, UID EXPUNGE and the QUOTA family. The imap2 endpoint exists for the standard iPhone/iPad mailer and deliberately differs in behaviour, rewriting multipart structure for Deco-mail pictures and transcoding i-mode pictographs to Unicode emoji. humanURL: https://www.docomo.ne.jp/service/developer/smart_phone/application/imap/ baseURL: imaps://imap.spmode.ne.jp:993 tags: - Email - IMAP - Protocol - Specification properties: - type: Documentation url: https://www.docomo.ne.jp/service/developer/smart_phone/application/imap/ - type: APIReference url: https://www.docomo.ne.jp/binary/pdf/service/developer/smart_phone/application/imap/mail_imap_spec_260126.pdf - type: Conventions url: conventions/ntt-docomo-conventions.yml common: - type: DomainSecurity url: security/ntt-docomo-domain-security.yml - type: Authentication url: authentication/ntt-docomo-authentication.yml - type: WellKnown url: well-known/ntt-docomo-well-known.yml - type: OpenIDConnectDiscovery url: well-known/ntt-docomo-openid-configuration.json - type: Conformance url: conformance/ntt-docomo-conformance.yml - type: Conventions url: conventions/ntt-docomo-conventions.yml - type: Lifecycle url: lifecycle/ntt-docomo-lifecycle.yml - type: StatusPage url: https://id.smt.docomo.ne.jp/src/dac/maintenance-g.html - type: Packages url: packages/ntt-docomo-packages.yml - type: LLMsTxt url: llms/ntt-docomo-llms.txt - type: Website url: https://www.docomo.ne.jp/ - type: Website url: https://www.docomo.ne.jp/english/ - type: Documentation url: https://www.docomo.ne.jp/service/developer/ - type: TermsOfService url: https://www.docomo.ne.jp/service/developer/policy/index.html - type: PrivacyPolicy url: https://www.docomo.ne.jp/utility/privacy/ - type: Support url: https://www.nttdocomo.co.jp/support/inquiry/ - type: HelpCenter url: https://www.docomo.ne.jp/support/ - type: Pricing url: https://www.docomo.ne.jp/charge/ - type: SignUp url: https://id.smt.docomo.ne.jp/cgi8/id/register - type: GitHubOrganization url: https://github.com/docomo - type: LinkedIn url: https://www.linkedin.com/company/ntt-docomo - type: Blog url: https://www.docomo.ne.jp/english/info/media_center/pr/ - type: PressReleases url: https://www.docomo.ne.jp/info/news_release/ maintainers: - FN: Kin Lane email: kin@apievangelist.com