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

# Registry Integrations

- [Registry Integrations](https://docs.carbonmark.com/registry-integrations/registry-integrations.md)
- [Data Attributes](https://docs.carbonmark.com/registry-integrations/data-attributes.md)
- [Transfer Credits to/from Carbonmark](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark.md)
- [ICR: Import Credits to Carbonmark](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark/icr-import-credits-to-carbonmark.md)
- [ICR: Export Credits to ICR](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark/icr-export-credits-to-icr.md)
- [Puro Bridge Integration Guide](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark/puro-bridge-integration-guide.md)
- [EcoRegistry (Cercarbono): Import Credits to Carbonmark](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark/ecoregistry-cercarbono-import-credits-to-carbonmark.md)
- [EcoRegistry (Cercarbono): Export Credits to EcoRegistry](https://docs.carbonmark.com/registry-integrations/transfer-credits-to-from-carbonmark/ecoregistry-cercarbono-export-credits-to-ecoregistry.md)
- [Retirement Certificate Support](https://docs.carbonmark.com/registry-integrations/retirement-certificate-support.md)