Miro Node.js client Readme

The Miro Node.js API client is a JavaScript library that enables Miro REST API functionality in Miro apps based on Node.js.

Miro Node.js client reference documentation

Miro Node.js API client library

The Miro Node.js API client is a JavaScript library that enables Miro REST API functionality in Miro apps based on Node.js.
You can use Node.js and JavaScript to send requests to and handle responses from the Miro REST API.

You can use the client to implement backend functionality in your Miro app, such as:

  • OAuth 2.0 authorization
  • Programmatic data exchange with an external system
  • Data storage in the app backend.

Install the client library

To install the Miro Node.js API client and its dependencies, run the following command in your project root directory:

npm install @mirohq/miro-api

Import the clients

The Miro Node.js library makes a stateful high-level client, and stateless low-level client available:

  • The Miro object is the stateful high-level client.
    It contains properties and methods to interact with Miro users. For example, to trigger the authorization flow.
    The Miro methods are related to authorization and access token management.
  • The MiroApi object is the stateless low-level client.
    It contains properties and methods for backend-to-backend communication and to run automation scripts.
    It enables passing the OAuth access token once, and then reusing it in subsequent calls.
    The MiroApi methods enable creating and getting boards associated with the current access token, performing CRUD operations on board items, as well as retrieving organization information and managing teams sand users (available on Enterprise API for users on an Enterprise plan.)

To start using the high-level Miro client, import it, and then create a new instance:

// Import the 'Miro' object
import {Miro} from "@mirohq/miro-api"

// Create a new instance of the Miro object
const miro = new Miro()

 * The 'as' method returns a high-level instance of
 * 'Api' for a specific user.
 * This makes all the methods that enable interacting with
 * boards and board items available to the specified user
miro.as(userId: ExternalUserId): MiroApi

To start using the low-level MiroApi client, import it, and then create a new instance:

// Import the 'MiroApi' object
import {MiroApi} from './index.ts'

// Create a new instance of the 'MiroApi' object,
// and pass the OAuth access token as a parameter
const api = new MiroApi('<access_token>')

// Use the 'MiroApi' instance to send a request to the Miro REST API,
// and to create a new board in the team where the App is installed
const boards = await api.createBoard()

Model hierarchy

  • The Miro .as(userId: string) method returns an instance of the MiroApi class.
    This instance provides methods to create and get the Board model.
  • Board has methods to create and get Item models.
  • Items includes methods to create connectors, as well as attach and detach tags, for the board items that support these features.

It's possible to access the methods, properties, and objects by traversing the hierarchy.
For example:

  1. Instantiate the Miro object, and use its as method to access the MiroApi object and its methods.
  2. Use the getBoard method of the the MiroApi object to access the Board object and its methods.
  3. Use the getCardItem method of the the Board object to access a specific CardItem object and its methods.
  4. Use the getAllTags method of the the CardItem object to access instances of the Tag object that are attached to the card item.
  5. Finally, the Tag object has methods to update and delete the card item's tags, as well as to retrieve all board items that have a specific tag.
 |__ as
     |__ MiroApi
          |__ getBoard
               |__ Board
                    |__ get<item-type>
                    |__ getItem
                         |__ Board items
                              |__ getAllTags
                              |    |__ Tags
                              |__ connectTo
                                   |__ Connectors


The client library includes helper methods that make it easy to paginate over all the resources using for await...of loops.
For example, the getAllBoards method is an AsyncGenerator that paginates automatically.


for await (const board of api.getAllBoards()) {
  if (shouldStop()) {
    // Stop requesting additional pages from the API



For production deployments, we recommend using a custom implementation backed by a database.

Most methods take userId as their first parameter. For example: isAuthorized, exchangeCodeForAccessToken, as.
userId corresponds to the internal ID of the user in your application. It can be either a string or a number. Usually, it's stored in session.

The client library requires persistent storage for user access and refresh tokens.
The client automatically refreshes access tokens before making API calls, if they are nearing their expiration time.

By default, persistent storage uses an in memory dictionary to store state information.
Pass storage to the Miro constructor as an option:

const miro = new Miro({
  storage: new CustomMiroStorage(),

To support the client library storage functionality in your app, implement the following get and set interface:

export interface Storage {
  get(userId: ExternalUserId): Promise<State | undefined>
  set(userId: ExternalUserId, state: State): Awaitable<void>

OAuth authorization

Miro handles authorization and per-user access token management.
By default, the client loads the app configuration from the following environment variables:


Alternatively, you can pass these values to the constructor when you create a new Miro instance:

import {Miro} from '@mirohq/miro-api'

const miro = new Miro({
  clientId: '<your_app_client_id>>',
  clientSecret: '<your_app_client_secret>',
  redirectUrl: 'https://example.com/miro_redirect_url',

The Miro client features all the necessary methods and options to complete Miro authorization flows, and to make API calls:

  1. Check if the current user has authorized the app: miro.isAuthorized(someUserId)
  2. If the user hasn't yet authorized the app, request the user to authorize the app by redirecting them to: miro.getAuthUrl()
  3. As part of the authorization flow, exchange the user temporary authorization code for an access token in the return URL request handler: await miro.exchangeCodeForAccessToken(someUserId, req.query.code)
  4. Make API calls on behalf of a specific user: await miro.as(someUserId).getBoard(boardId)

For more information about the available options related to authorization, see the MiroOptions interface reference documentation.


This example implements a simple app using the Fastify framework:

import {Miro} from '@mirohq/miro-api'
import Fastify from 'fastify'
import fastifyCookie from '@fastify/cookie'

const miro = new Miro()

const app = Fastify()

// Generate user IDs for new sessions
app.addHook('preHandler', (request, reply, next) => {
  if (!request.cookies.userId) {
    const userId = Math.random()
    reply.setCookie('userId', userId)
    request.cookies.userId = userId

// Exchange the temp code for an access token in the OAuth2 redirect handler
app.get('/auth/miro/callback', async (req, reply) => {
  await miro.exchangeCodeForAccessToken(req.cookies.userId, req.query.code)

app.get('/', async (req, reply) => {
  // If user did not authorize the app, then redirect them to auth url
  if (!(await miro.isAuthorized(req.cookies.userId))) {

  // Initialize the API for the current user
  const api = miro.as(req.cookies.userId)

  // Print the detail about first returned board
  for await (const board of api.getAllBoards()) {
    return board

await app.listen({port: 4000})

What's next

Build a simple app to automate retrieving a list of all the boards you have access to in a specific team.