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Technical guide · Standard or specification

OpenAPI as a machine-readable action contract

How OpenAPI helps software and agents understand HTTP operations without confusing interface description with permission to execute those operations.

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Scope: this guide explains a technical signal observed by AI Web Check. It does not claim that the signal causes ranking, indexing, citation or inclusion in AI answers.

What OpenAPI contributes

OpenAPI provides a language-agnostic description of HTTP APIs: paths, operations, parameters, request and response schemas, servers, and security schemes. That makes an interface easier for programmatic clients to understand.

For agentic use this is a useful discovery layer, but an operation described in OpenAPI is not automatically a safe tool. Machine readability and execution authority are separate properties.

What AI Web Check evaluates

AI Web Check treats OpenAPI discovery as a contextual or optional AI-commerce signal and does not invoke described operations. It does not send credentials or attempt a real checkout to “test” the contract.

The purpose is to determine whether a bounded public machine contract exists and whether declared endpoints are safe to publish.

A minimal read-only operation

openapi: 3.1.0
info:
  title: Catalog API
  version: 1.0.0
paths:
  /products:
    get:
      summary: List public products
      responses:
        '200':
          description: Product list

Make the contract agent-friendly and safe

  • Use unambiguous summaries and operationId values.
  • Define strict request schemas, real error responses, and actual security requirements.
  • Separate read-only operations from state-changing operations.
  • Use scoped authorization, idempotency or confirmation where side effects are possible.