openapi: 3.1.0
info:
  title: Climatiq Autopilot Reference API
  version: '3'
  description: Climatiq is a carbon emissions calculation API that gives developers programmatic access to a curated database of emission factors and to purpose-built calculation endpoints. The API exposes search over the factor catalog and a family of estimation endpoints for activity-based and spend-based calculations across travel, freight, energy, cloud computing, procurement, and CBAM workflows. Authentication uses an API key sent as a Bearer token in the Authorization header. Responses are JSON with deterministic emission outputs in CO2e (kg) plus the underlying factor metadata.
  contact:
    name: Climatiq Support
    url: https://www.climatiq.io/support
  license:
    name: Climatiq Terms of Service
    url: https://www.climatiq.io/legal/terms
servers:
- url: https://api.climatiq.io
  description: Climatiq Production API
security:
- bearerAuth: []
tags:
- name: Reference
  description: Reference data such as regions and unit types.
paths:
  /data/v1/regions:
    get:
      operationId: listRegions
      summary: List supported regions
      description: Returns the geographic regions Climatiq supports for region-specific emission factors.
      tags:
      - Reference
      responses:
        '200':
          description: Supported regions.
  /data/v1/unit-types:
    get:
      operationId: listUnitTypes
      summary: List supported unit types
      description: Returns the unit types accepted by estimation endpoints (energy, distance, weight, money, etc.).
      tags:
      - Reference
      responses:
        '200':
          description: Supported unit types.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key