aid: gleefulai
url: https://raw.githubusercontent.com/api-evangelist/gleefulai/refs/heads/main/apis.yml
name: Gleeful AI
description: 'Gleeful AI publishes Visibility, an AI-visibility and answer-engine-optimization audit API:
  it scores how visible and understandable a website is to AI assistants and agents, audits AI crawler
  access (GPTBot, ClaudeBot and others), generates a production-ready llms.txt and schema.org markup,
  checks brand citation across assistants, and runs competitor gap analysis. The access model is the notable
  part — there are no API keys. Every priced endpoint answers an unauthenticated request with HTTP 402
  and an x402 v2 challenge in a Payment-Required header, settled in USDC on Base at prices from $0.06
  to $0.55 a call, published machine-readably at /api/pricing alongside /api/capabilities and /api/catalog.
  Discovery, pricing and two preview endpoints are free. It is an agent-native API in both directions:
  built to be paid for and called by an agent, and built to measure whether agents can read you.'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/gleefulai.png
created: '2026-08-03'
modified: '2026-08-03'
specificationVersion: '0.21'
type: Index
position: Producing
access: 3rd-Party
kind: contract
tags:
- Artificial Intelligence
- Agents
- x402
- Micropayments
- SEO
- Audit
- Website
- Content
- Crawlers
- Monetization
apis:
- aid: gleefulai:visibility-ai-audit-api
  name: Visibility AI Audit API
  description: AI visibility / AEO audit API with x402 micropayments. No API key required.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://visibility.gleefulai.com/docs
  baseURL: https://visibility.gleefulai.com
  tags:
  - Audit
  - AI Visibility
  - x402
  - Agents
  - SEO
  properties:
  - url: openapi/gleefulai-visibility-openapi.json
    type: OpenAPI
  - url: https://visibility.gleefulai.com/openapi.json
    type: X-OpenAPI-Source
  - url: https://visibility.gleefulai.com/docs
    type: Documentation
  - url: https://visibility.gleefulai.com/api/pricing
    type: Pricing
  - url: https://visibility.gleefulai.com/api/capabilities
    type: X-Capabilities
  - url: https://visibility.gleefulai.com/api/catalog
    type: X-Catalog
  - url: authentication/gleefulai-authentication.yml
    type: Authentication
  - url: plans/gleefulai-plans.yml
    type: Plans
  - url: https://visibility.gleefulai.com/llms.txt
    type: LlmsText
common:
- url: https://visibility.gleefulai.com
  type: Website
- url: https://visibility.gleefulai.com/docs
  type: Documentation
- url: https://visibility.gleefulai.com/api/pricing
  type: Pricing
- url: https://visibility.gleefulai.com/llms.txt
  type: LlmsText
- url: authentication/gleefulai-authentication.yml
  type: Authentication
- url: plans/gleefulai-plans.yml
  type: Plans
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
X-Discovery:
  date: '2026-08-03'
  method: probed
  note: Requested by mohammed-mlh in apisio/apis.io#45. Everything below was fetched before the profile
    was written.
  findings:
  - surface: OpenAPI
    url: https://visibility.gleefulai.com/openapi.json
    http_status: 200
    real: true
    note: OpenAPI 3.1.0, 30 operations, every priced POST documents a 402 response.
  - surface: x402
    url: https://visibility.gleefulai.com/api/audit/score
    http_status: 402
    real: true
    note: LIVE 402 with a decodable x402 v2 Payment-Required challenge — exact scheme, eip155:8453, USDC,
      60000 units ($0.06), 300s timeout.
  - surface: Pricing
    url: https://visibility.gleefulai.com/api/pricing
    http_status: 200
    real: true
    note: Machine-readable, 14 priced endpoints.
  - surface: LlmsTxt
    url: https://visibility.gleefulai.com/llms.txt
    http_status: 200
    real: true
  - surface: Website
    url: https://gleefulai.com
    http_status: DNS failure
    real: false
    note: The apex does not resolve; only the visibility. subdomain exists. Slug still follows the registrable
      domain per convention.