api.js

import JsonApi from 'devour-client'
import apiConfig from 'javascript/config'

import modelData from 'javascript/models'

const api = new JsonApi(apiConfig)
api.headers = Object.assign(apiConfig.headers, api.headers)
api.insertMiddlewareBefore('axios-request', {
  name: 'set-auth-token',
  req: payload => {
    const token = localStorage.getItem('AUTH_TOKEN')
    if (token) {
      api.headers.Authorization = 'Bearer ' + token
      payload.req.headers.Authorization = 'Bearer ' + token
    } else {
      delete api.headers.Authorization
      delete payload.req.headers.Authorization
    }
    return payload
  }
})

api.define('page', modelData.pages)
api.define('collection', modelData.collections)
api.define('page-image', modelData.pageImages)
api.define('content-position', modelData.contentPositions)
api.define('meta-datum', modelData.metaData)

export default api

Continue on with the definitions until the whole api is specced out.