API Evangelist enhancements for Snov.io Authentication Email Verifier API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Snov.io Authentication Email Verifier API
  version: 1.0.0
  x-generated: '2026-08-13'
  x-method: generated
  x-source: apis.yml + https://snov.io/api + repo artifacts
  x-description: Non-destructive overlay of API Evangelist enhancements over snov-io-email-verifier-api-openapi.yml.
    Records provenance, the published rate limit, the absence of idempotency, the credit-metering model,
    the real error envelopes and the sibling MCP agent surface. The underlying OpenAPI is never mutated
    by this overlay.
extends: snov-io-email-verifier-api-openapi.yml
actions:
- target: $.info
  description: Record the provider-published reference as the source of record and correct the title generated
    during harvesting.
  update:
    x-source-of-record: https://snov.io/api
    x-provider: Snov.io
    x-provider-publishes-openapi: false
    contact:
      name: Snov.io Support
      url: https://snov.io/knowledgebase/
      x-api-docs: https://snov.io/api
    termsOfService: https://snov.io/terms-and-conditions
- target: $
  description: Attach external documentation and the cross-cutting runtime semantics an agent needs before
    it calls anything.
  update:
    externalDocs:
      description: Snov.io API reference
      url: https://snov.io/api
    x-rate-limit:
      requests: 60
      window: 1 minute
      scope: account
      headers: []
      note: Stated in prose at https://snov.io/api. No RateLimit-* or Retry-After headers are returned.
    x-idempotency:
      supported: false
      note: No idempotency mechanism is published. A retried credit-consuming POST can double-charge.
    x-metering:
      model: credits
      note: Most operations deduct credits per RESULT; several are free when they return nothing. See
        finops/snov-io-finops.yml.
    x-error-envelopes:
    - '{"errors":{"code":int,"title":string,"source":string}}'
    - '{"success":false,"errors":[string]}'
    x-agent-surface:
      mcp: https://mcp.snov.io/mcp
      mode: remote
      auth: oauth
- target: $
  description: Document the two-step async task pattern that governs every start/result pair in this document.
  update:
    x-async-pattern:
      style: two-step start/result
      correlator: task_hash
      status_field: status
      status_values:
      - in_progress
      - completed
      callback_parameter: webhook_url
      start_operations:
      - startEmailVerification
      result_operations:
      - getEmailVerificationResult
      note: No failure terminal state is documented; a caller cannot distinguish a running job from a
        dead one.