generated: '2026-08-25'
method: searched
source: >-
  All 34 MetricStream Business API reference pages and all 8 module API Overview pages under
  https://assets.metricstream.com/pdf/Developer-Portal/, plus
  https://www.metricstream.com/platform/apis.htm — read 2026-08-25.
summary: >-
  MetricStream publishes NO rate limits for its Business REST APIs. The module overview pages
  enumerate the cross-cutting conventions the platform DOES guarantee — pagination, sorting, error
  handling, validation, authorization — and rate limiting is conspicuously not among them. No
  RateLimit-* or X-RateLimit-* response header is documented anywhere, no Retry-After is mentioned,
  and 429 is not declared on any of the 204 published operations (the declared status set is
  200/400/401/403/404/422 on every single one). An agent therefore has no runtime signal for
  throttling and no documented backoff contract.
limit_count: 0
limits: []
response_headers: []
exhaustion_status: not documented
retry_after: not documented
retry_guidance: not documented
concurrency_limits: not documented
bulk_limits:
  documented: false
  note: >-
    102 of the 204 operations are bulk (POST /bulk/..., PATCH /bulk/..., POST /collections/...), and
    no maximum batch size or payload size is published for any of them. Neither is the default or
    maximum value of the documented `limit` pagination parameter.
scheduler_note: >-
  https://www.metricstream.com/platform/apis.htm describes a built-in scheduler for "systematic bulk
  request processing and periodic data exchange", which implies server-side throttling exists — it is
  simply not specified to the client.
evidence:
- url: https://assets.metricstream.com/pdf/Developer-Portal/MsIsmISM-API-Overview.html
  status: 200
  finding: lists pagination, sorts, error handling, validation, authorization — no rate limiting
- url: https://assets.metricstream.com/pdf/Developer-Portal/GRCF_API/MsGrcRisk.html
  status: 200
  finding: 6 operations, declared statuses 200/400/401/403/404/422 — no 429
- url: https://www.metricstream.com/platform/apis.htm
  status: 200
  finding: no published limits