generated: '2026-08-26'
method: searched
source: >-
  https://purplelab.com/sitemap.xml (HTTP 200, 238 URLs reviewed), plus live response-header
  inspection of https://api.purplelab.com/ (HTTP 200) and https://api.healthnexus.io/ (HTTP 403),
  2026-08-26.
note: >-
  NO PUBLISHED RATE LIMITS. PurpleLab publishes no developer documentation of any kind, so there is
  no limits page, no quota table, and no documented exhaustion behaviour. Neither live API host
  returned a rate-limit response header on an anonymous request. limit_count is 0 by measurement.

rate_limits: []
limit_count: 0

observed_headers:
- host: api.purplelab.com
  probe_url: https://api.purplelab.com/
  http_status: 200
  content_type: application/json
  ratelimit_headers_present: false
  headers_looked_for:
  - X-RateLimit-Limit
  - X-RateLimit-Remaining
  - X-RateLimit-Reset
  - RateLimit-Limit
  - RateLimit-Remaining
  - RateLimit-Reset
  - RateLimit-Policy
  - Retry-After
  finding: >-
    None present on the anonymous root response. An unauthenticated caller receives no runtime
    budget signal at all.
- host: api.healthnexus.io
  probe_url: https://api.healthnexus.io/
  http_status: 403
  content_type: application/json
  body: '{"message":"Forbidden"}'
  ratelimit_headers_present: false
  finding: >-
    AWS API Gateway rejects every anonymous request before any limit is evaluated, so no limit
    signal can be observed without credentials. AWS API Gateway conventionally returns HTTP 429 with
    {"message":"Too Many Requests"} on throttling, but PurpleLab does not document this and it was
    NOT observed, so it is not recorded as a finding.

exhaustion_behaviour:
  status_code: null
  retry_after: null
  documented: false
  observed: false

agent_impact: >-
  An agent integrating HealthNexus cannot plan its call budget from anything public. There is no
  documented limit, no per-key or per-account scope statement, and no runtime header to back off
  against - the limit must be discovered by hitting it, or negotiated in the enterprise contract.