generated: '2026-08-23'
method: probed
source: >-
  Live unauthenticated requests to https://api.isnetworld.com/token on 2026-08-23 and
  a full read of ISN's public site; no rate-limit documentation exists to search.
limit_count: 0
limits: []
headers_observed: []
headers_documented: []
exhaustion_status: null
retry_after: false
note: >-
  ISN publishes no rate limits for the ISNetworld API and returns no rate-limit
  signalling headers on the responses observable without credentials. Repeated
  unauthenticated requests to /token returned no X-RateLimit-*, no RateLimit-*, and no
  Retry-After header, and no 429 was elicited. The response header set is limited to
  date, server, request-context, strict-transport-security and x-powered-by. An
  authenticated client therefore has no runtime backpressure signal to read and no
  published number to design against; whether limits exist at all cannot be determined
  from outside the subscriber boundary. Recorded as an honest zero, not an absence of
  checking.
probes:
- url: https://api.isnetworld.com/token
  method: GET
  status: 401
  rate_limit_headers: none
  repeated: 3