generated: '2026-09-17'
method: searched
source: >-
  https://support.avaya.com/css/public/documents/101095743 — "IP Office Release 12.3 MTCTI-3 Web
  Services API SDK Version 1.2", linked from https://www.avaya.com/en/developer-support/sdks/. Served
  as application/zip (1,577,305 bytes) with no login. The archive carries bundle/ipo_mtcti3.proto,
  bundle/MTCTI3_API_version1p0.pdf and bundle/SDK.
ownership:
  verdict: avaya
  justification: >-
    Avaya IP Office is an Avaya product, the .proto ships inside Avaya's own SDK download on
    avaya.com, and the file dates from 2025-10-06 — the most recently authored machine-readable
    contract found anywhere on Avaya's on-premises surface.
files:
  - file: avaya-ip-office-mtcti3.proto
    product: Avaya IP Office Platform Release 12.3
    interface: MTCTI-3 (Multi-Tenant CTI, third generation)
    syntax: proto3
    messages: 68
    enums: 12
    services: 0
    rpcs: 0
    bytes: 14749
    source_path: bundle/ipo_mtcti3.proto
    note: >-
      HONEST READING OF WHAT THIS IS: a proto3 MESSAGE schema, not a gRPC service definition. It
      declares 68 messages and 12 enums (PartyInfo, DialInfo, TrunkInfo and the call/agent state
      families) and contains no `service` or `rpc` block at all. MTCTI-3 frames these Protobuf messages
      over its own transport rather than over gRPC, so an agent cannot generate a client stub from this
      file the way it could from a gRPC .proto. It is still a real, first-party, machine-readable
      contract for the IP Office CTI wire format, and it is the only Protobuf Avaya publishes.
not_found:
  - probe: github.com/avaya organization
    result: >-
      7 repos (6 CPaaS clients + oss-example-automation). No .proto, no buf.build module, no gRPC
      service anywhere in the org.
  - probe: buf.build
    result: no Avaya module published.
  - probe: developers.avayacloud.com (Infinity + Experience Platform hubs)
    result: >-
      No gRPC or Protobuf reference section. The cloud platforms are REST + webhooks only; see
      openapi/ and asyncapi/.