generated: '2026-09-02'
method: probed
source: https://api.varsitytutors.com/vtwa/v1/link_blocks_directory/lookup
limit_count: 0
note: >-
  No rate limits are published, because Varsity Tutors publishes no developer
  documentation of any kind. The one API path the company's own robots.txt allows a
  crawler to touch — /vtwa/v1/link_blocks_directory/lookup on the first-party gateway
  api.varsitytutors.com — was fetched unauthenticated and returned HTTP 422 with the
  plain-text body "Invalid parameters: id, subject, or full_path must be present". Its
  response carried NO rate-limit headers: no X-RateLimit-*, no RateLimit-*, no
  Retry-After. The headers actually returned were cache-control, referrer-policy,
  x-amzn-trace-id, x-content-type-options, x-download-options, x-frame-options,
  x-permitted-cross-domain-policies, x-request-id, x-runtime, x-xss-protection,
  x-powered-by (Phusion Passenger 6.0.14) and server (vt-apigw). An agent calling this
  gateway has no runtime budget signal at all.
limits: []
headers:
  observed: []
  ratelimit_standard: false
  retry_after: false
exhaustion_status: null
evidence:
- url: https://api.varsitytutors.com/vtwa/v1/link_blocks_directory/lookup
  status: 422
  finding: no rate-limit response headers present on an unauthenticated call
- url: https://api.varsitytutors.com/robots.txt
  status: 200
  finding: 'Allow: /vtwa/v1/link_blocks_directory/lookup then Disallow: / — the only crawlable API path'