Alto (Vebra / Zoopla) · OpenAPI Overlay 1.0.0

API Evangelist enhancements for Alto API

3 actions 3 updates update extends openapi/alto-api-openapi.json
Generated by API Evangelist Written by API Evangelist tooling for Alto (Vebra / Zoopla)'s API. It is a proposal applied on top of the contract, not a document Alto (Vebra / Zoopla) publishes.
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What the actions change

x-apievangelist-providerx-apievangelist-generatedx-apievangelist-artifactsx-apievangelist-accessx-apievangelist-tenancyx-apievangelist-authx-apievangelist-scopesx-apievangelist-pagination

Targets 3

$.info
$.paths./clients.get
$.paths./contacts/{contactId}/bank-accounts.get

OpenAPI Overlay

Raw ↑ 
overlay: 1.0.0
info:
  title: API Evangelist enhancements for Alto API
  version: 1.0.0
extends: openapi/alto-api-openapi.json
x-apievangelist:
  generated: '2026-07-26'
  method: generated
  source: derived from the harvested spec plus the searched artifacts in this repo
  note: Additive only. Records what API Evangelist established about this contract; the harvested spec is never
    mutated.
actions:
- target: $.info
  update:
    x-apievangelist-provider: alto-vebra
    x-apievangelist-generated: '2026-07-26'
    x-apievangelist-artifacts:
      authentication: authentication/alto-vebra-authentication.yml
      scopes: scopes/alto-vebra-scopes.yml
      conventions: conventions/alto-vebra-conventions.yml
      errors: errors/alto-vebra-problem-types.yml
      lifecycle: lifecycle/alto-vebra-lifecycle.yml
      conformance: conformance/alto-vebra-conformance.yml
      sandbox: sandbox/alto-vebra-sandbox.yml
      data_model: data-model/alto-vebra-data-model.yml
    x-apievangelist-access:
      gate: partner-only
      self_serve_signup: false
      note: The contract is anonymous and public; credentials require a Vebra Solutions contract, an integration
        registered in Alto Connect and per-agency activation.
    x-apievangelist-tenancy:
      header: AgencyRef
      required_on: 110 of 112 operations
      failure_status: 403
    x-apievangelist-auth:
      model: oauth2 client credentials -> Bearer JWT
      token_endpoint: https://api.alto.zoopladev.co.uk/token
      note: The spec models the credential as an apiKey-in-header scheme named Bearer; the token endpoint is documented
        in prose only.
    x-apievangelist-scopes:
      count: 101
      declared_in: operation description prose, not securitySchemes
      artifact: scopes/alto-vebra-scopes.yml
    x-apievangelist-pagination:
      style: cursor
      casings:
      - next-token/max-results
      - nextToken/maxResults
      - NextToken/MaxResults
      note: Three casings of the same two parameters in one document.
    x-apievangelist-idempotency:
      request_keys: false
      duplicate_handling: 409 Conflict with Location header(s) on contacts, contact relationships and leads
    x-apievangelist-events:
      asyncapi: asyncapi/alto-vebra-alto-webhooks-asyncapi.yml
      event_types: 26
      envelope: CloudEvents 1.0
- target: $.paths./clients.get
  update:
    x-apievangelist-deprecation:
      deprecated: true
      replacement: GET /contacts
      removal_date: null
      note: Marked obsolete in the summary and deprecated:true in the spec; no sunset date is published.
- target: $.paths./contacts/{contactId}/bank-accounts.get
  update:
    x-apievangelist-sensitivity:
      level: high
      data: landlord and tenant bank account details
      scope: alto/read:contact_bank_accounts
      note: One of only six semantic scopes in the API — Alto singled this data out deliberately. Exclude from general-purpose
        agent surfaces.