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PACT — Partnership for Carbon Transparency
PACT is a not-for-profit initiative hosted by the World Business Council for Sustainable Development (WBCSD). It provides one open standard for calculating a product carbon footprint (PCF) and an open network for exchanging PCFs directly between companies, peer-to-peer, with no central platform holding the data.
- Authority
- 46 reach 5 · trust 5 · quality 21 · freshness 15
- Tier
- listed
- llms.txt
- https://www.carbon-transparency.org/llms.txt
- Sections
- 6
- Links
- 29
- Size
- 5885 bytes
- Popularity rank
- #904988
- Country
- United States
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-19T10:45:18.366Z
- Last checked
- 2026-10-21T20:22:19.623Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-21T20:22:16.472Z. Cached copy · Source on carbon-transparency.org
# PACT — Partnership for Carbon Transparency
> PACT is a not-for-profit initiative hosted by the World Business Council for Sustainable Development (WBCSD). It provides one open standard for calculating a product carbon footprint (PCF) and an open network for exchanging PCFs directly between companies, peer-to-peer, with no central platform holding the data.
Launched in 2020. Industry-agnostic, used across every major sector and economy. 150+ stakeholders and industry initiatives representing roughly 2,500 companies participate; 50+ software solutions have passed PACT conformance testing.
Key facts that are commonly misstated:
- **PACT is not a platform, tool, or database.** It publishes a methodology and a technical specification that any organisation may implement in its own software.
- **PACT never stores emissions data.** PCFs are exchanged directly between supplier and customer. Each organisation owns its data and decides who may access it.
- **"PACT Conformant", not "certified" or "compliant".** Compliance is a legal requirement; conformance is voluntary adherence to the specification. PACT issues no certifications.
- **Conformance testing is free** and open to any solution globally.
- **Scope:** cradle-to-gate product carbon footprints. PCFs from suppliers feed into the Scope 3 upstream categories of their customers' corporate carbon footprints.
- PACT builds on the GHG Protocol Product Life Cycle Accounting and Reporting Standard, the Scope 3 Standard, and applicable ISO standards. WBCSD is a co-convenor of the GHG Protocol.
## The standard
- [PACT Methodology](https://www.carbon-transparency.org/pact-methodology): Version 3 of the methodology for calculating and exchanging cradle-to-gate product carbon footprints. The authoritative source for how a PCF is calculated under PACT.
- [Resources library](https://www.carbon-transparency.org/resources): Methodology and technical specifications V3, implementation guides, white papers, data model extensions.
- [FAQs](https://www.carbon-transparency.org/faqs): Direct answers on what PACT is, how conformance testing works, what is and is not in scope.
## Technology and the network
- [PACT Network](https://www.carbon-transparency.org/network): Directory of 50+ PACT Conformant solutions for peer-to-peer PCF exchange. Conformant solutions interoperate, so there is no vendor lock-in.
- [Developer Resources](https://www.carbon-transparency.org/developer-resources): How to build and test a PACT Conformant Solution, and get listed on the network.
- [Technical specification (docs)](https://docs.carbon-transparency.org/): The PACT Data Exchange Protocol — the API specification for exchanging PCF data.
- [Latest protocol version](https://docs.carbon-transparency.org/tr/data-exchange-protocol/latest/): Current released version of the Data Exchange Protocol.
- [PACT Network Services](https://www.carbon-transparency.org/pact-network-services): Open-source services — Identity Management for secure partne
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