generated: '2026-07-19'
method: searched
source: >-
  https://docs.kotoba.tech/overview/introduction, https://docs.kotoba.tech/llms.txt,
  captured openapi/ and asyncapi/ specs
notes: >-
  Kotoba APIs are in PRIVATE ALPHA, available to selected customers by request
  (kotoba_product@kotoba.tech). No status page, no SLA, no changelog, no
  deprecation policy, and no versioning policy document are published — this is
  expected for an alpha-stage surface and is recorded as absent rather than
  fabricated. Consequently no `StatusPage` and no `Deprecation` pointer is
  emitted in apis.yml.
maturity:
  stage: private-alpha
  access: request-only
  access_contact: kotoba_product@kotoba.tech
  evidence: >-
    "Kotoba APIs are in private alpha — access is limited to selected customers"
    (docs.kotoba.tech/llms.txt and /overview/introduction)
versioning:
  scheme: uri-path
  policy_url: null
  observed_versions:
  - {surface: transcription-rest, version: v1, path: /v1/transcription_jobs}
  - {surface: asr-realtime, version: v1, channel: /v1/realtime}
  - {surface: tts-realtime, version: v2, channel: /v2/tts/ws}
  - {surface: sts-realtime, version: unversioned, channel: /sts}
  spec_versions:
  - {file: openapi/kotoba-transcription-openapi-original.yml, info_version: 1.0.0}
  - {file: asyncapi/kotoba-asr-asyncapi.yml, info_version: 1.0.0}
  - {file: asyncapi/kotoba-sts-asyncapi.yml, info_version: 1.0.0}
  - {file: asyncapi/kotoba-tts-asyncapi.yml, info_version: 1.0.0}
  inconsistency: >-
    Version discipline is uneven across the three realtime channels: ASR is
    /v1-prefixed, TTS is /v2-prefixed, and STS carries no version segment at all.
deprecation:
  policy_url: null
  sunset_header: false
  deprecation_header: false
  deprecated_operations: []
  evidence: 'no `deprecated: true` flag in any captured spec and no policy page found'
sla:
  url: null
  uptime_target: null
status_page: null
support:
  email: kotoba_product@kotoba.tech
  docs: https://docs.kotoba.tech/
changelog: null
observations:
- >-
  The STS AsyncAPI ships a placeholder production server URL,
  `wss://dummy.api.kotobatech.ai/`, where ASR uses `wss://api.kotobatech.ai/`
  and TTS uses `wss://tts.api.kotobatech.ai/`. This looks like an unreleased
  placeholder left in a published spec and is worth reporting to the provider.
- >-
  The production host api.kotobatech.ai answers 503 to unauthenticated requests
  on every path, consistent with the gated private alpha.