> For the complete documentation index, see [llms.txt](https://docs.finema.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.finema.co/api-tutorials/vc-api/get-verification-key.md).

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{% tab title="422 The error message will given as the response if given CID does not exist or if the VC has been revoked."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

##