# Credential

DID users want to publish commemorative badges or NFTs for an event, or they want to publish credentials for someone who achieved an accomplishment.

### Architecture

<figure><img src="/files/dBo8VpKFssFPtJdawL5G" alt=""><figcaption></figcaption></figure>

### Issue Credential

To issue a commemorative badge or NFT for an event, the issuer only needs to contact the official HashKey DID with his address, and obtain the official signature information from HashKey DID. Issuer can invoke DID contract with signature to publish his credentials. For more details, please visit Publish Credential.


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# 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.hashkey.id/protocol/credential.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.