> For the complete documentation index, see [llms.txt](https://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://guardian.hedera.com/guardian/project-comparison/project-comparison-apis/comparing-vp-documents-v1.md).

# Comparing VP Documents - V1

**`POST /api/v1/projects/compare/documents`**

Compares two or more VC documents across projects and returns both VC-level and VP-level comparison results. This endpoint does not require authentication.

***

## Request

### Request Body

```json
{
  "documentId1": "63e3e5e8a01b3c001234abcd",
  "documentId2": "63e3e5e8a01b3c001234abce"
}
```

Alternatively, compare multiple documents at once:

```json
{
  "documentIds": [
    "63e3e5e8a01b3c001234abcd",
    "63e3e5e8a01b3c001234abce"
  ]
}
```

| Field         | Type   | Required | Description                                                                          |
| ------------- | ------ | -------- | ------------------------------------------------------------------------------------ |
| `documentId1` | string | No\*     | ID of the first document. Required if `documentIds` is absent                        |
| `documentId2` | string | No\*     | ID of the second document. Required if `documentIds` is absent                       |
| `documentIds` | array  | No\*     | Array of document IDs to compare. Required if `documentId1`/`documentId2` are absent |

***

## Response

### Success Response

**Status:** `200 OK`

```json
{
  "projects": {
    "documents": {},
    "left": {},
    "right": {},
    "total": {}
  },
  "presentations": {
    "documents": {},
    "left": {},
    "right": {},
    "total": {}
  }
}
```

| Field           | Type   | Description                                    |
| --------------- | ------ | ---------------------------------------------- |
| `projects`      | object | VC document comparison result                  |
| `presentations` | object | VP (Verifiable Presentation) comparison result |

### Error Responses

| Status                      | Description                                          |
| --------------------------- | ---------------------------------------------------- |
| `422 Unprocessable Entity`  | Neither document pair nor documentIds array provided |
| `500 Internal Server Error` | Unexpected server failure                            |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guardian.hedera.com/guardian/project-comparison/project-comparison-apis/comparing-vp-documents-v1.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.