You don't have to edit MessageBird or AscendDB's code. Create a new service with the following code!

__main__.js

const lib = require('lib')({ token: process.env.STDLIB_TOKEN })
const peaks = lib.ascendb.peaks['@1.0.0'];

/**
* Messagebird SMS handler that fetches AscenDB stats
* @param {string} sender The phone number that sent the text to be handled
* @param {string} receiver The StdLib phone number that received the SMS
* @param {string} message The contents of the SMS
* @param {string} createdDatetime Datetime when the SMS was sent
* @returns {object}
*/
module.exports = async (sender, receiver, message, createdDatetime, context) => {
  console.log('not found, sender', sender, 'receiver', receiver, 'message', message, 'createdDatetime', createdDatetime)
  let [result] = await peaks({
    fields: [
      'elev',
      'prom',
      'names',
      'lat',
      'lon',
      'ors'
    ],
    filters: {
      name: message
    }
  });

  let replyText = result ?
    `${result.names && result.names[0].name} has an elevation of ${result.elev} feet and a prominence of ${result.prom} feet.` :
    `Could not find ascendb info matching ${message}`

  return lib.messagebird.sms.create({
    originator: receiver,
    recipient: sender,
    body: replyText
  })
}

README.md

Example usage:

lib . --receiver 14434034651 --sender 14159856466 --message "Mount Everest"

Note that the recceiver phone number needs to be claimed using this method: https://stdlib.com/@messagebird/lib/numbers