PACT CONFORMANT
zerocarbon joins the pact network
ZeroCarbon passed the conformance tests of the Partnership for Carbon Transparency (PACT) for Technical Specifications v3.0. Product carbon footprints made in ZeroCarbon can now be requested, shared and received by any other PACT conformant solution.
- v3.0
- PACT Technical Specifications
- 39 / 39
- mandatory conformance test cases passed
- Production
- tested against our live PACT API, not a demo
- 27 Oct 2026
- listed in the PACT Network
// For our customers
What it means
Buyers increasingly ask suppliers for the carbon footprint of the products they sell, and each buyer tends to ask in its own template. PACT gives that exchange one globally recognised format and one API. As a PACT conformant solution, ZeroCarbon lets a manufacturer:
- calculate product carbon footprints from its own verified emissions ledger, under the PACT Methodology v3.0;
- publish those footprints once and answer every customer who connects through a PACT conformant solution;
- receive footprints from its own suppliers in the same format, in place of spend-based estimates;
- decide which partner sees which footprint: nothing is shared without a grant.
// Conformance testing
What the tests checked
PACT runs its conformance testing tool against a live solution. Our production PACT API passed every mandatory test case in the v3.0 suite, covering:
- Authentication
- Access tokens are issued only for valid credentials, and every request without a valid token is refused.
- Footprints
- Listing footprints, fetching one by its ID, pagination, and a clear error for an ID that does not exist.
- Filters
- By product, company, geography, classification, validity dates and status, alone and combined, including queries that must match nothing.
- Events
- A customer requests a footprint and receives it, or a clear rejection for an unknown product; partners are notified when a footprint is published.
- Transport
- Every endpoint refuses plain HTTP and accepts only encrypted connections.
// The initiative
About PACT
The Partnership for Carbon Transparency (PACT) seeks to unlock decarbonization through real transparency in value chains, by establishing the global and standardized product-level carbon footprint calculation methodology and technology infrastructure for accurate, primary and verified Scope 3 emissions measurement and data exchange.
PACT is an initiative hosted by the World Business Council for Sustainable Development (WBCSD), and was developed with leading stakeholders from across the carbon ecosystem, leveraging WBCSD's role as co-convenor of the Greenhouse Gas Protocol.
// Acknowledgement
Thank you to the PACT team at the World Business Council for Sustainable Development for the specifications, the conformance testing service and their support through the process.
A customer asked you for a PACT footprint?
Tell us who is asking and for which products, and we will help you answer through PACT.