x402 List API API Rules

# Spectral governance ruleset for the x402 List OpenAPI document.
#
# Referenced from /.well-known/apis.json (rules[].type = SpectralRules) as the machine-readable
# governance artifact for apis.io readiness, and used by CI. This served copy is the single source
# of truth; the project-root .spectral.yaml simply extends it so `spectral lint` auto-discovers it.
#
# Lint the live contract with:
#   npx @stoplight/spectral-cli lint https://x402-list.com/api/v1/openapi.json
extends:
  - "spectral:oas"
rules:
  # An agent-facing contract must name a contact, a license, and its terms of service.
  x402-info-contact:
    description: The API info object must declare a contact.
    given: "$.info"
    severity: error
    then:
      field: contact
      function: truthy
  x402-info-license:
    description: The API info object must declare a license.
    given: "$.info"
    severity: error
    then:
      field: license
      function: truthy
  x402-info-terms-of-service:
    description: The API info object should declare termsOfService.
    given: "$.info"
    severity: warn
    then:
      field: termsOfService
      function: truthy
  # The document must declare at least one server so an agent knows where to call.
  x402-servers-defined:
    description: The document must declare at least one server.
    given: "$"
    severity: error
    then:
      field: servers
      function: truthy
  # Every operation should carry a description an agent can read.
  x402-operation-description:
    description: Every operation should have a description.
    given: "$.paths[*][get,post,put,patch,delete]"
    severity: warn
    then:
      field: description
      function: truthy