{"id":"4ca999a2-fe08-4df4-a9de-efcd5aec6cb9","name":"GreenCalculus","slug":"greencalculus","description":"Sourced greenhouse-gas emission factors and audit-traced carbon calculations. Every value returns with its exact source cell and data version - reproducible and citable. REST API with bearer-token auth; endpoints for factor lookup, resolution, and GHG activity, embodied, PCAF, electricity, freight, spend-based and business-travel calculations.","website_url":"https://greencalculus.com","category":["api","data"],"score":{"overall":40,"raw":40,"capped":false,"verified":false,"breakdown":{"latency":8,"consistency":7,"doc_quality":2,"error_clarity":5,"auth_simplicity":5,"token_efficiency":5,"first_try_success":0,"response_parseability":5},"source":"heuristic","credential_tested":false,"probe_health":{"status":"healthy","up_pct":1.0,"samples":9,"target":"api","p50_latency_ms":37,"last_probed":"2026-08-24T05:05:05.512038+00:00","lookback_hours":24,"no_response":0}},"latency":null,"uptime_30d":null,"protocols":["rest","mcp"],"auth_type":null,"mcp_manifest_url":null,"openapi_spec_url":null,"verified":false,"domain_verified":true,"claimed":true,"vendor_id":"ecf94f76-d578-4a33-aa53-f8b123360f03","status":"active","profile":{"pitch":"Sourced greenhouse-gas emission factors and audit-traced carbon calculations over a REST API. Every value returns with its exact source cell and data version, so a number an agent produces can be traced back to the published row it came from and cited. The corpus carries roughly 17,000 canonical factor keys across fuels, grid electricity, freight, refrigerants, embodied materials, spend-based EEIO and business travel. Where a factor does not exist, the API returns a structured absence record explaining why rather than an empty result or a silent zero - an agent can tell 'we do not publish this' apart from 'your request was ignored'. Base URL is https://api.greencalculus.com/v1; the OpenAPI 3.1 spec is at https://api.greencalculus.com/openapi.json and an MCP surface at https://mcp.greencalculus.com.","pricing":{"model":"per-request tiers","notes":"Free key at https://greencalculus.com/developers. Paid tiers add higher rate limits and the full consolidated corpus feed.","currency":"USD","free_tier":"Yes","starting_at":"$0"},"features":["every value carries its source id, cell reference and retrieval date","structured absence records instead of empty results or substituted zeros","natural-language resolution from a description to ranked factor keys","unit conversion and the arithmetic working returned with each result","GHG Protocol scope and category stated per factor","batch endpoint for up to 100 mixed-methodology calculations","dual location-based and market-based Scope 2 reporting in one call"],"use_cases":["resolving a plain-text activity description to a canonical emission-factor key","computing Scope 1, 2 and 3 emissions with a reproducible audit trail","PCAF financed-emissions attribution for a loan or investment portfolio","EN 15978 whole-life embodied carbon by lifecycle module","citing a specific factor value, vintage and source cell in a disclosure"],"onboarding":"Get a free key at https://greencalculus.com/developers, then send it as 'Authorization: Bearer gc_live_...' against https://api.greencalculus.com/v1. GET /v1/health and GET /v1/factors need no key at all, so an agent can confirm reachability and browse the corpus before authenticating.","alternatives":["climatiq","carbon-interface","cloverly"],"integrations":["rest","mcp","openapi","python-sdk"],"target_audience":["sustainability and climate-disclosure teams","carbon accounting and ESG software vendors","AI agents performing carbon calculations","financial institutions reporting under PCAF"]},"pricing":{"model":"per-request tiers","notes":"Free key at https://greencalculus.com/developers. Paid tiers add higher rate limits and the full consolidated corpus feed.","currency":"USD","free_tier":"Yes","starting_at":"$0"},"last_crawled":"2026-08-24T07:12:34.469463+00:00","last_benchmarked":null,"supports_x402":false,"agent_auth_methods":null,"supports_streaming":false,"has_sandbox":false,"sdks":null,"llms_txt_url":"https://greencalculus.com/llms.txt","similarity_score":null,"telemetry_evidence":null,"mycelio":null,"featured":false}