Add API server interface document

[Mini256]

Feature Request

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Is your feature request related to a Issue or PR(Optional)

• PR or Issue Link:

Describe the feature you'd like:

As title.

Do you have any ideas on how to implement it?(Optional)

[ti-chi-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
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/lifecycle stale

[ti-chi-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
If this issue is safe to close now please do so with /close.
Send feedback to sig-community-infra or Mini256.
/lifecycle rotten