docs: function capturePayload (endpoint, payload) {
    var dumpfile = path.join(os.tmpdir(), 'opbeat-' + endpoint + '-' + Date.now() + '.json')
    fs.writeFile(dumpfile, JSON.stringify(payload), function (err) {
      if (err) console.log('could not capture intake payload: %s', err.message)
      else console.log('intake payload captured: %s', dumpfile)
    })
  }