name: Visibility (GleefulAI)
description: >-
  Visibility is an AI-visibility and answer-engine-optimization audit API from GleefulAI. It scores
  how visible and understandable a website is to AI assistants and agents, then generates the
  artifacts to improve it — audit scoring at three depths, fix generation, competitor gap and
  suggestion comparison, bot-access auditing, citation checking, and generation of `llms.txt` and
  schema markup. The unusual part is payment: there are no API keys at all. Access is metered per
  call through x402 micropayments in USDC on Base, so a caller pays per request rather than
  registering. That makes it callable by an agent with a wallet and no signup flow.
url: https://gleefulai-visibility.apievangelist.com/apis.yml
created: '2026-08-02'
modified: '2026-08-02'
specificationVersion: '0.21'
tags:
  - AI Visibility
  - Answer Engine Optimization
  - AEO
  - Website Audit
  - Agent-native
  - x402
  - Micropayments
  - llms.txt
  - Developer Tools
apis:
  - name: Visibility AI Audit API
    description: >-
      Audits how visible a website is to AI assistants and agents. 36 operations across 22 paths —
      every path answers both GET and POST — covering audit scoring at score/full/deep depths, fix
      generation, competitor comparison and gap analysis, bot-access auditing, citation checking,
      and generation of llms.txt and schema markup. OpenAPI 3.1.0. No API keys: access is paid per
      call via x402 micropayments in USDC on Base.
    humanURL: https://visibility.gleefulai.com/docs
    baseURL: https://visibility.gleefulai.com
    tags:
      - AI Visibility
      - Answer Engine Optimization
      - Website Audit
      - x402
      - Agent-native
    properties:
      - type: OpenAPI
        url: openapi/gleefulai-visibility-openapi.json
      - type: OpenAPI
        url: https://visibility.gleefulai.com/openapi.json
      - type: Documentation
        url: https://visibility.gleefulai.com/docs
common:
  - type: Website
    url: https://visibility.gleefulai.com
  - type: Documentation
    url: https://visibility.gleefulai.com/docs
  - type: LLMSTxt
    url: llms/gleefulai-visibility-llms.txt
  - type: LLMSTxt
    url: https://visibility.gleefulai.com/llms.txt
  - type: Company
    url: https://gleefulai.com
maintainers:
  - FN: GleefulAI
    url: https://gleefulai.com
x-evidence:
  harvested: '2026-08-02'
  request: apisio/apis.io#45
  probes:
    - https://visibility.gleefulai.com/openapi.json -> HTTP 200, OpenAPI 3.1.0, 22 paths / 36 ops
    - https://visibility.gleefulai.com/llms.txt -> HTTP 200, 2,072 bytes, text/plain
    - https://visibility.gleefulai.com/docs -> HTTP 200
    - https://visibility.gleefulai.com/nonexistent-xyz789 -> HTTP 404 (no catch-all; the 200s are real)
    - https://visibility.gleefulai.com/.well-known/api-catalog -> HTTP 404
    - https://visibility.gleefulai.com/apis.json -> HTTP 404
  defects_found:
    no_schemas: >-
      36 operations and zero `components.schemas`. Request and response bodies are undescribed,
      which is the largest gap in the contract.
    version_reads_prerelease: >-
      `info.version` is 0.1.0 on a document declaring OpenAPI 3.1.0. Anything parsing the API's own
      version reads it as pre-release.
  not_asserted:
    pricing: >-
      Access is x402 micropayments in USDC on Base, per the spec description and the submission.
      No machine-readable rate card or per-call price list was found, so plans and rate limits are
      not asserted.
  note: >-
    Submitted by mohammed-mlh on the legacy apisio/apis.io repo, which is a deprecated channel that
    people still find. Slug carries the parent company because "visibility" alone is far too
    generic for a catalog namespace keyed on provider.