API Evangelist enhancements for TransUnion TruContact Trusted Call Solutions (STI-AS / STI-VS)

overlay: 1.0.0
info:
  title: API Evangelist enhancements for TransUnion TruContact Trusted Call Solutions (STI-AS / STI-VS)
  version: 1.0.0
extends: openapi/transunion-trucontact-tcs-shaken-openapi.yml
x-apievangelist:
  generated: '2026-08-13'
  method: generated
  source: openapi/transunion-trucontact-tcs-shaken-openapi.yml
  note: >-
    Captures API Evangelist's enhancements without mutating the harvested spec. The two
    substantive additions are (1) the securitySchemes block the spec omits — the API is
    authenticated by an apiKey query parameter that is declared only as an ordinary
    parameter, so no tool can see it as auth; and (2) provenance/ownership metadata
    recording that this Neustar-branded contract is TransUnion's TruContact business.
actions:
  - target: $.info
    update:
      x-apievangelist-provider: TransUnion
      x-apievangelist-product: TruContact Trusted Call Solutions
      x-apievangelist-source: https://github.com/neustar/tcs-apis (branch gh-pages, oas-spec.yaml)
      x-apievangelist-docs: https://neustar.github.io/tcs-apis/
      x-apievangelist-ownership-note: >-
        Published under the Neustar brand and logo. Neustar's Communications Solutions
        business became TransUnion TruContact after TransUnion's $3.1B acquisition of
        Neustar closed in December 2021; Trusted Call Solutions is marketed today at
        transunion.com/solution/trucontact/branded-communications/trusted-call-solutions.
      x-apievangelist-deployment: >-
        Templated servers[] block is correct, not a defect — the STI-AS/STI-VS is deployed
        inside each carrier's own network, so there is no TransUnion-hosted base URL.
  - target: $.info
    update:
      contact:
        name: TransUnion TruContact Trusted Call Solutions
        url: https://www.transunion.com/solution/trucontact/branded-communications/trusted-call-solutions
      license:
        name: MIT
        url: https://github.com/neustar/tcs-apis/blob/main/LICENSE
  - target: $.components
    update:
      securitySchemes:
        apiKeyQuery:
          type: apiKey
          in: query
          name: apiKey
          description: >-
            ADDED BY API EVANGELIST — not present in the published spec. info.description
            states the apiKey query parameter carries a pre-provisioned value and is
            validated on restricted calls, but no securityScheme was declared, so the nine
            operations read as unauthenticated to every generator, gateway and scanner.
  - target: $.paths['/authn/v2/identityj-j'].post
    update:
      x-apievangelist-review:
        declared_responses: [200, 4xx, 5xx]
        observed_in_examples: [400, 403, 406, 415, 500, 503]
        gap: >-
          Wildcard response codes hide the concrete failure statuses. The 179 error_ids
          extracted to errors/transunion-problem-types.yml exist only inside examples.
  - target: $.paths['/verify/v2/identityCVT'].post
    update:
      x-apievangelist-review:
        note: >-
          The only operation returning Call Validation Treatment (CNAM + robocall
          analytics) alongside the verification verdict — the commercially distinctive
          endpoint of the surface.