pallectrum/electrum/chains/testnet4/servers.json

{
    "testnet4-electrumx.wakiyamap.dev": {
        "pruning": "-",
        "s": "51002",
        "t": "51001",
        "version": "1.4"
    },
    "blackie.c3-soft.com": {
        "pruning": "-",
        "s": "57010",
        "t": "57009",
        "version": "1.4"
    },
    "mempool.space": {
        "pruning": "-",
        "s": "40002",
        "version": "1.4"
    }
}