小程序APP ID已经添加到 微信境外商户号的 授权中。
调用统一下单支付接口：https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi
返回：
http response:[StatusCode: 400 Code: "INVALID_REQUEST" Message: 暂不支持境外支付
境外微信支付， 返回 “暂不支持境外支付”Overseas WeChat payment, return "Overseas payment is not currently supported"
境外微信支付， 返回 “暂不支持境外支付”小程序APP ID已经添加到 微信境外商户号的 授权中。
调用统一下单支付接口：https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi
返回：
http response:[StatusCode: 400 Code: "INVALID_REQUEST" Message: 暂不支持境外支付
The applet app ID has been added to the authorization of wechat overseas merchant number. Call the unified order payment interface: https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi Return: HTTP response: [statuscode: 400 Code: "invalid_request" message: overseas payment is not supported at the moment
回答：
接口调的不对，境外商户不支持调用国内支付接口
1、参考的是哪个文档？
群主管理都是支付大佬
参考这个看看 https://pay.weixin.qq.com/wiki/doc/api/wxpay/ch/pay/In-AppPay/chapter6_2.shtml