Is it possible to check which RPC APIs are available?

Question

Is it possible for a decentralized application to get details about the offered JSON-RPC APIs from the local ethereum node?

I want to check the following specs in the following order using web3.js:

Is the 2nd step even possible if CORS is disabled for my remote domain? Will a disabled CORS RPC port be discoverable? If so, how?

Whit Jack · Accepted Answer · 2016-02-02 00:09:17Z

4

1 and 2 can be checked with web3.isConnected()

You can't check these if you don't have cors for your domain because you can't access the rpc without it

answered Feb 2 '16 at 0:09

Whit Jack

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but can 1 and 2 be checked independently? – Afr Feb 2 '16 at 0:58
AFAIK makes no sense to check 2 via web3.js, if the response was false, you would not be able to ask. – Viktor Trón Feb 2 '16 at 1:21
1

FYI as of yesterday, there is this npmjs.com/package/web3_extended which brings you admin and debug through js. Use with extreme caution. – Viktor Trón Feb 2 '16 at 1:25
as of yesterday @tjade273 published npmjs.com/package/web3_ipc which is a fork that adds IPC support – Viktor Trón Feb 17 '16 at 1:26

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