generated: '2026-08-03'
method: probed
status: published
provider_published: true
source: https://visibility.gleefulai.com/openapi.json
description: 'No API keys. Access is priced per call and settled with x402 micropayments
  — an unauthenticated request returns HTTP 402 with a Payment-Required header carrying
  a base64 x402 v2 challenge, and the caller pays USDC on Base to proceed. This is
  a keyless, agent-native access model: an agent can discover the price and pay without
  a human ever creating an account.'
verified: '2026-08-03'
schemes:
- id: x402
  type: payment
  protocol: x402
  version: 2
  header: Payment-Required
  network: eip155:8453 (Base)
  asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC)
  pay_to: '0x9b916480d6D32c055563cD0B191543E9851F4E2F'
  scheme: exact
  max_timeout_seconds: 300
keyless_access:
  available: true
  free_endpoints:
  - /api/health
  - /api/status
  - /api/catalog
  - /api/pricing
  - /api/capabilities
  - /api/preview/audit
  - /api/preview/compare
  - /api/examples/{endpoint}
  note: Discovery, pricing, capabilities and two teaser previews are free and unauthenticated.
evidence:
- url: https://visibility.gleefulai.com/api/audit/score
  status: 402
  method: POST
  note: Live 402 confirmed, Payment-Required header carried a decodable x402 v2 challenge.
- url: https://visibility.gleefulai.com/api/pricing
  status: 200
  note: Machine-readable price table, 14 endpoints, USDC on Base.
- url: https://visibility.gleefulai.com/api/capabilities
  status: 200