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  • interactive docs
  • Rate-limited API access
  • Emissions Index


designed for app developers and education
  • Visitor plus:
  • No rate limits (fair use access)
  • Secure token-based auth
  • Basic support
  • free marginal emissions access to grid region: CAISO_ZP26


designed for IoT companies, battery operators, and renewable energy developers
  • Open plus:
  • Marginal carbon emissions
  • US-wide coverage (lower 48)
  • Europe coverage
  • Webhooks
  • Custom integrations
  • Premium support
  • Forecast marginal carbon emissions [Coming Soon]!
Are you a researcher or sustainability professional looking for bulk historical data? Contact us to obtain a Pro account and request access to our downloadable CSVs.