gistfile1.txt

curl --request POST \
  --url http://localhost:8082/foo \
  --header 'content-type: application/json' \
  --data '{
	"bar": "FOOBAR"
}'

server_one.js

var express = require('express');
var bodyParser = require('body-parser');
var Gun = require('gun');

var gun = Gun('http://localhost:8082/gun')

gun.get('bar').on(function(data, key){
    console.log(data, key)
})

var app = express()

app.use(Gun.serve)

app.listen('8080')

sever_two.js

var express = require('express');
var bodyParser = require('body-parser');
var Gun = require('gun');

var gun = Gun('http://localhost:8080/gun')
var app = express();

app.use(Gun.serve)
app.use(bodyParser.json())

app.post('/foo', function(req, res) {
    gun.get('bar').put(req.body)
    res.sendStatus(200)
});

gun.get('bar').on(function(data, key){
    console.log(data, key)
})

app.listen('8082')