> For the complete documentation index, see [llms.txt](https://documentation.carbonregistry.com/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.carbonregistry.com/documentation/carbonregistry.com/on-chain.md).

# On Chain

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>How it works</td><td></td><td></td><td><a href="https://2441265052-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FfIdoGcZZdvap67xjb5h1%2Fuploads%2FppMCu0NhQ6jlMuce1HTn%2Fpexels-ann-h-45017-15368259.jpg?alt=media&amp;token=76e42eb7-6f9f-4345-88e8-c0eb3b76bfed">pexels-ann-h-45017-15368259.jpg</a></td><td><a href="/documentation/carbonregistry.com/on-chain/how-it-works.md">How It Works</a></td></tr><tr><td>Credit data</td><td></td><td></td><td><a href="https://2441265052-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FfIdoGcZZdvap67xjb5h1%2Fuploads%2F3mrab63beN1VTYOwQFib%2Fpexels-markusspiske-330771.jpg?alt=media&amp;token=fc4ae286-c78c-4953-9e3b-3db91af1e06b">pexels-markusspiske-330771.jpg</a></td><td><a href="/documentation/carbonregistry.com/on-chain/credit-data.md">Credit Data</a></td></tr><tr><td>Contracts</td><td></td><td></td><td><a href="https://2441265052-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FfIdoGcZZdvap67xjb5h1%2Fuploads%2FINk5srFBoJtspaHM6SBO%2Fpexels-a-darmel-7641842.jpg?alt=media&amp;token=6a9dd8a7-8d35-48e0-b0a3-127913d7a64a">pexels-a-darmel-7641842.jpg</a></td><td><a href="/documentation/carbonregistry.com/on-chain/contracts.md">Contracts</a></td></tr><tr><td>Retiring Credits Onchain</td><td></td><td></td><td></td><td></td></tr></tbody></table>