> For the complete documentation index, see [llms.txt](https://dev.guardian.hedera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.guardian.hedera.com/tasks-and-external/trustchains-apis.md).

# Trustchains APIs

**Base URL:** `/api/v1/trust-chains`

These endpoints allow auditors to list VP (Verifiable Presentation) documents and build full trustchains tracing a VP back to its root Verifiable Credential, enabling verification of carbon credit provenance.

**Authentication:** All endpoints require a valid JWT Bearer token (`Authorization: Bearer <token>`). Obtain a token via `POST /accounts/login`. Permission `AUDIT_TRUST_CHAIN_READ` is required for all endpoints.

***

## Endpoints

| Method | Endpoint               | Description                                            | Auth Required |
| ------ | ---------------------- | ------------------------------------------------------ | ------------- |
| GET    | `/trust-chains`        | Return a list of all VP documents                      | Yes           |
| GET    | `/trust-chains/{hash}` | Build and return a trustchain from a VP to the root VC | Yes           |

***

## Endpoint Details

* [Requesting VP Documents](/tasks-and-external/trustchains-apis/requesting.md) — `GET /trust-chains`
* [Building and Returning a Trustchain](/tasks-and-external/trustchains-apis/building-and-returning.md) — `GET /trust-chains/{hash}`


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