Good news everyone!
We have corrected CORS headers, even for non-200 responses.

Also, we have added a few methods:
1) /v2/events/emulate, /v2/traces/emulate, /v2/wallet/emulate and /v2/accounts/{account_id}/events/emulate for emulating external (and internal) mesages.

2) /v2/accounts/{account_id}/reindex - forces the reindexing of an account by sending a message to it. This can be useful if you have changed the collection and want to reindex all items.

3) /v2/accounts/search - useful for implementing autocomplete in your app.

4) /v2/accounts/{account_id}/publickey and /v2/tonconnect/stateinit will help you if you are integrating Ton Connect but don't want to work with cells and TVM.