v17 (retired)

Status

Retired March 8, 2026

No longer supported.

Summary

v17 is primarily focused on improving the stability and performance of order processing. It includes a few breaking changes from v16 (highlighted below).

Release notes

General

• Removed network query parameter from the following endpoints. Default network is Polygon.

  • GET /activities

  • GET /carbonProjects

  • GET /carbonProjects/:id

  • GET /categories

  • GET /countries

  • GET /listings/:id

  • GET /listings

  • GET /purchases/:id

  • GET /purchases

  • GET /prices

  • GET /retirements

  • GET /retirements/:id

  • GET /retirements/:id/provenance

  • GET /vintages

Endpoints updated

GET /carbonProjects

• [⚠️BREAKING CHANGE] Response entries are now paginated

• Added a block_long_description field that contains a project description in PortableText format

GET /carbonProjects/:id

• Added a block_long_description field that contains a project description in PortableText format

Endpoints added

GET /assessors

• Returns the list of known project assessors (related to project verification and validation)

GET /developers

• Returns the list of known project developers

GET /retirements/:beneficiaryAddress/:retirementIndex

• Get retirement details for a completed retirement order. This replaces the endpoint that was present in previous versions (see Endpoints removed below)

GET /retirements/:beneficiaryAddress/:retirementIndex/provenance

• Get the credit provenance history leading up to a completed retirement. This replaces the /provenance endpoint that was present in previous versions (see Endpoints removed below)

Endpoints removed

GET /retirements/:hash

• [⚠️BREAKING CHANGE] This endpoint was removed because a transaction hash may now include more than one retirement. It has been replaced by /retirements/:beneficiaryAddress/:retirementIndex. See Endpoints added for more info. See migration path for alternatives.

GET /retirements/:hash/provenance

• [⚠️BREAKING CHANGE] This endpoint was removed because a transaction hash may now include more than one retirement. It has been replaced by /retirements/:beneficiaryAddress/:retirementIndex. See Endpoints added for more info. See migration path for alternatives.

Migration Path

• Carbon Projects endpoint

  • The /carbonProjects endpoint is now paginated. Your UI or system may need to be refactored to consume pages, rather than a complete list of projects. The project data is now provided in the items attribute of the response.

• Retirement endpoints

  • If you were using the GET /retirements/:hash and GET /retirements/:hash/provenance you should now use the new endpoints:

    • GET /retirements/:beneficiaryAddress/:retirementIndex

    • GET /retirements/:beneficiaryAddress/:retirementIndex/provenance

  • If you only have the transaction hash you can still use the hash to filter on the GET /retirements endpoint, which returns a list.

    • Example using hash to filter: https://v17.api.carbonmark.com/retirements?hash=0x7b63b79d25c76b6f179360ebd5f9f3c2435d3fdf2dda7e1d3ab43cf4f90e4a04