How to modify a capability just like APP_GROUPS

I can not find an api to set a group id.

An API? That’s not going to happen. Your access to app groups is controlled by the App Groups entitlement,

com.apple.security.application-groups

, which is baked into your code signature. You can’t change that dynamically.

What’s your overall goal here? What were you hoping to do with this API?

Share and Enjoy
—
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

from the doc : https://developer.apple.com/documentation/appstoreconnectapi/bundle_id_capabilities
I can only enable or disable a capabilities of bundleId, but I can not edit it's just like setting app group or binding a APN key

Oh, you’re talking about the App Store Connect API! I thought you were talking about APIs on the device itself.

I recommend that you repost your question, but this time apply the App Store Connect API tag. That’s your best hope for engaging with folks with App Store Connect API expertise.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@apple.com"