SustainMetrics
sustainmetrics.net
Provides a REST API and web tool to query 15,000+ greenhouse gas emission factors from DEFRA, EPA, ADEME and Ember and calculate Scope 1, 2 and 3 emissions.
The SustainMetrics API uses API key authentication; has freemium pricing; offers a free tier (Free plan: 50 API requests/day; calculator itself free with no signup); rate limits: Free: 50 req/day; Pro: 1,000 req/day; Business: 100,000 req/day; resets daily at midnight UTC; 429 on exceed. Verified 2026-07-26 with per-field source links.
Pricing
Free $0/mo; Pro $29/mo (1,000 API req/day); Business $99/mo (100,000 req/day)
sustainmetrics.net ↗Rate limits
Free: 50 req/day; Pro: 1,000 req/day; Business: 100,000 req/day; resets daily at midnight UTC; 429 on exceed
sustainmetrics.net ↗OpenAPI spec
not documented null
no sourceMCP server
not documented null
no source