generated: '2026-09-19'
method: searched
source: Live headers on POST https://api.greenhelix.net/v1/execute (2026-09-19) + openapi/_original/greenhelix-net-openapi.json
  + https://github.com/mirni/a2a/blob/main/CHANGELOG.md
derived_from: openapi/_original/greenhelix-net-openapi.json
versioning:
  scheme: URL path version (/v1) for the REST surface; semver for the application (info.version 1.4.10, echoed by
    /v1/health)
  current_version: v1 (app 1.4.10)
  spec_url: https://api.greenhelix.net/v1/openapi.json
  base_url: https://api.greenhelix.net
  policy_published: false
  note: 'No written versioning policy. Unversioned aliases /health, /pricing, /pricing/{tool} and /execute exist
    as 301 redirects into /v1 (observed: GET /health -> 301 https://api.greenhelix.net/v1/health).'
deprecation:
  policy_published: false
  sunset_header: true
  deprecation_header: true
  rfc8594: true
  observed:
    date: '2026-09-19'
    request: POST https://api.greenhelix.net/v1/execute
    http_status: 410
    headers:
      deprecation: 'true'
      sunset: Thu, 01 Oct 2026 00:00:00 GMT
      link: </docs/api-reference.md#deprecation-v1-execute>; rel="sunset"; type="text/markdown"
    body:
      type: https://api.greenhelix.net/errors/endpoint-removed
      title: Gone
      status: 410
      detail: POST /v1/execute has been removed. Use the dedicated REST endpoints under /v1/<domain>/<operation>
        instead. See /docs for the migration guide.
  deprecated_operations:
  - operationId: execute_v1_execute_post
    path: POST /v1/execute
    state: removed (410 Gone) with RFC 8594 Deprecation + Sunset + Link headers; sunset 2026-10-01
    in_contract: still listed, deprecated flag NOT set; description says the wrapper 'carries RFC 8594 deprecation
      headers'
  - operationId: create_api_key_deprecated_v1_infra_keys_post
    path: POST /v1/infra/keys
    state: deprecated by description ('self-service key creation moved to /v1/billing/keys'); still served
    in_contract: deprecated flag NOT set
  - operationId: _redirect_execute_execute_post
    path: POST /execute
    state: 301 alias of the removed /v1/execute
  note: >-
    Green Helix does the mechanically right thing on removal — a 410 with Deprecation/Sunset/Link headers is textbook
    RFC 8594 — but nothing in the contract flags either deprecated operation (`deprecated: true` appears zero times),
    the migration guide the Link points at lives only in the GitHub api-reference (the relative link 404s on the
    API host), the public docs.html and README still present POST /v1/execute as 'the primary endpoint', and the
    removal is absent from CHANGELOG.md, whose newest entry (v1.4.8, 2026-04-16) predates the deployed 1.4.10.
status_page:
  published: false
  note: No status page found. /v1/health, /livez and /readyz are open health probes (health returns per-database
    status and tool count); /v1/metrics (Prometheus) is gated to the enterprise tier or an allowed IP (403 observed).
sla:
  published: per-tool only
  note: Every tool in /v1/pricing carries sla.max_latency_ms (200-10000 ms); the enterprise tier is described as
    'Unlimited access with priority support and SLA' but no uptime or credit terms are published.
changelog: changelog/greenhelix-net-changelog.yml
support_windows:
  free: no support
  starter: community
  pro: email
  enterprise: 'priority (source: /v1/pricing/tiers support_level)'