generated: '2026-08-13'
method: searched
source: https://apimta.act.com/act.web.api/
description: >-
  Act! states that Act! Premium Cloud API requests are rate limited and names
  the three response headers a client should read. It does not publish a
  number: no request-per-minute figure, no per-plan quota, no burst allowance,
  and no status code for exhaustion. The runtime signal is therefore the only
  way to discover the limit — read X-RateLimit-Limit on the first response.
provider: Act! CRM
providerId: act
scope_note: >-
  Rate limiting is documented for Act! Premium Cloud (Act!-hosted). Self-hosted
  Act! Web API instances run on the customer's own IIS server; Act! publishes no
  limits for those, and any throttling there is whatever the customer's IIS
  configuration imposes.
limit_count: 0
limits: []
headers:
  X-RateLimit-Limit: The number of calls you can make a minute.
  X-RateLimit-Remaining: The number of calls you have left this minute.
  X-RateLimit-Reset: The next time the limit will be reset.
window: minute
responseCodes:
  throttled: null
  note: >-
    Act! documents no status code for a throttled request and no Retry-After
    header. The Swagger document declares no 429 on any of its 410 operations.
retry_guidance: >-
  Not published. Because X-RateLimit-Reset names the next reset instant, a
  client should back off until that instant rather than using a fixed delay.
probe:
  url: https://apimta.act.com/act.web.api/api/system
  http_status: 200
  fetched: '2026-08-13'
  observed_headers: [Cache-Control, Content-Type, Server, X-AspNet-Version, Strict-Transport-Security]
  note: >-
    The anonymous version route returns no X-RateLimit-* headers, so the
    documented headers could not be confirmed live without credentials. They are
    recorded here as the provider publishes them, not as observed values.
gaps:
  - No published numeric limit.
  - No per-plan or per-tier quota published on https://www.act.com/pricing/.
  - No documented status code or Retry-After on exhaustion.
docs: https://apimta.act.com/act.web.api/