gistfile1.txt

const express         = require('express')
const bodyParser      = require('body-parser')
const methodOverride  = require('method-override')

const axios = require('axios')

const app = express()

app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json())
app.use(methodOverride())

app.post('/comprar', (req, res) => {
  console.log(JSON.stringify(req.body, null, 4))

  const { token_id, amount } = req.body
  const api_key = 'suaapikeyaqui'
  const url = `https://api.pagar.me/1/transactions/${token_id}/capture`
  
  axios
    .post(url, {
      amount,
      api_key,
    })
    .then(console.log)
    .catch(console.log)
    
})

app.listen(3000, () => {
  console.log('Vc iniciou o server')
});

gistfile2.txt

:D