# GET VC Verification Key

To verify a VC, a verifier could use the VC's CID (`<cid>`) to request for a verification key of the VC with a GET request method. The verification key can then be used to decrypt the VC's digital signature to obtain a hash value. The verifier can be certained that the VC has not been tempered if the obtained hash matches with the VC's hash.

<mark style="color:blue;">`GET`</mark> `https://test-network.finema.co/vc/<cid>`

{% tabs %}
{% tab title="200 The issuer DID address, the CID (<cid>) of the VC and its verification key will be given as the response." %}

```
{
    "did_address": "did:idin:9cd19d4cbab9ca1d6f4c6a4b9117fb8904f250b47307cf4f484424f44e0c8370",
    "cid": "c498bdd8a72811eabca70242c0a82004",
    "verification_key": "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEeR8NhQeHPT7l1yMyvkZMacPpibjH\n7mp5IRyO2J2kuE97h/fzu1c/7DFsO23qUN6/OezYglMEkoVo5Ob1b6k53A==\n-----END PUBLIC KEY-----"
}
```

{% endtab %}

{% tab title="422 The error message will given as the response if given CID does not exist or if the VC has been revoked." %}

```
{
    "errors": [
        {
           "status": 422,
            "title": "Invalid Attribute",
            "detail": "the server cannot process the request",
        }
    ]
}
```

{% endtab %}
{% endtabs %}

##


---

# Agent Instructions: 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://docs.finema.co/api-tutorials/vc-api/get-verification-key.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.