Add Identity to your app
Use Identity to verify user data
In this guide, we'll start from scratch and walk through how to use Identity to retrieve identity data. If you are already familiar with using Plaid and are set up to make calls to the Plaid API, you can skip ahead to Fetching identity data.
Get Plaid API keys and complete application profile
If you don't already have one, you'll need to create a Plaid developer account. After creating your account, you can find your API keys under the Team Settings menu on the Plaid Dashboard.
You will also need to complete your application profile on the Dashboard. The information in your profile will be shared with users of your application when they manage their connection on the Plaid Portal. Your application profile must be completed before connecting to certain institutions in Production.
Install Plaid libraries
You can use our official libraries to connect to the Plaid API from your application:
Select group for content switcher1# Install via npm2npm install --save plaid
Create an Item in Link
Plaid Link is a drop-in module that provides a secure, elegant authentication flow for each institution that Plaid supports. Link makes it secure and easy for users to connect their bank accounts to Plaid. Note that these instructions cover Link on the web. For instructions on using Link within mobile apps, see the Link documentation.
Using Link, we will create a Plaid Item, which is a Plaid term for a login at a financial institution. An Item is not the same as a financial institution account, although every account will be associated with an Item. For example, if a user has one login at their bank that allows them to access both their checking account and their savings account, a single Item would be associated with both of those accounts. If you want to customize Link's look and feel, you can do so from the Dashboard.
Before initializing Link, you will need to create a new link_token
on the server side of your application.
A link_token
is a short-lived, one-time use token that is used to authenticate your app with Link.
You can create one using the /link/token/create
endpoint. Then, on the client side of your application, you'll need to initialize Link with the link_token
that you just created.
In the code samples below, you will need to replace PLAID_CLIENT_ID
and PLAID_SECRET
with your own keys, which you can obtain from the Dashboard.
Create a link_token
Select group for content switcher1// Using Express2const express = require('express');3const app = express();4app.use(express.json());56const { Configuration, PlaidApi, PlaidEnvironments } = require('plaid');78const configuration = new Configuration({9 basePath: PlaidEnvironments[process.env.PLAID_ENV],10 baseOptions: {11 headers: {12 'PLAID-CLIENT-ID': process.env.PLAID_CLIENT_ID,13 'PLAID-SECRET': process.env.PLAID_SECRET,14 },15 },16});1718const client = new PlaidApi(configuration);1920app.post('/api/create_link_token', async function (request, response) {21 // Get the client_user_id by searching for the current user22 const user = await User.find(...);23 const clientUserId = user.id;24 const request = {25 user: {26 // This should correspond to a unique id for the current user.27 client_user_id: clientUserId,28 },29 client_name: 'Plaid Test App',30 products: ['identity'],31 language: 'en',32 webhook: 'https://webhook.example.com',33 redirect_uri: 'https://domainname.com/oauth-page.html',34 country_codes: ['US'],35 };36 try {37 const createTokenResponse = await client.linkTokenCreate(request);38 response.json(createTokenResponse.data);39 } catch (error) {40 // handle error41 }42});
Install Link dependency
1<head>2 <title>Connect a bank</title>3 <script src="https://cdn.plaid.com/link/v2/stable/link-initialize.js"></script>4</head>
Configure the client-side Link handler
1const linkHandler = Plaid.create({2 token: (await $.post('/create_link_token')).link_token,3 onSuccess: (public_token, metadata) => {4 // Send the public_token to your app server.5 $.post('/exchange_public_token', {6 public_token: public_token,7 });8 },9 onExit: (err, metadata) => {10 // Optionally capture when your user exited the Link flow.11 // Storing this information can be helpful for support.12 },13 onEvent: (eventName, metadata) => {14 // Optionally capture Link flow events, streamed through15 // this callback as your users connect an Item to Plaid.16 },17});1819linkHandler.open();
Get a persistent access_token
Next, on the server side, we need to exchange our public_token
for an access_token
and item_id
. The access_token
will allow us to make authenticated calls to the Plaid API. Doing so is as easy as calling the /item/public_token/exchange
endpoint from our server-side handler. We'll use the client library we configured earlier to make the API call.
Save the access_token
and item_id
in a secure datastore, as they’re used to access Item
data and identify webhooks
, respectively. The access_token
will remain valid unless you actively chose to expire it via rotation or remove the corresponding Item via /item/remove
. The access_token
should be stored securely, and never in client-side code. A public_token
is a one-time use token with a lifetime of 30 minutes, so there is no need to store it.
1// Using Express2const express = require('express');3const app = express();4app.use(express.json());56const { Configuration, PlaidApi, PlaidEnvironments } = require('plaid');78const configuration = new Configuration({9 basePath: PlaidEnvironments[process.env.PLAID_ENV],10 baseOptions: {11 headers: {12 'PLAID-CLIENT-ID': process.env.PLAID_CLIENT_ID,13 'PLAID-SECRET': process.env.PLAID_SECRET,14 'Plaid-Version': '2020-09-14',15 },16 },17});1819const client = new PlaidApi(configuration);2021app.post('/api/exchange_public_token', async function (22 request,23 response,24 next,25) {26 const publicToken = request.body.public_token;27 try {28 const response = await client.itemPublicTokenExchange({29 public_token: publicToken,30 });31 const accessToken = response.data.access_token;32 const itemID = response.data.item_id;33 } catch (error) {34 // handle error35 }36});
Fetching Identity data
Now that the authentication step is out of the way, we can begin using authenticated endpoints from the Plaid API. Once you've retrieved identity data for an account, you can then use it to collect end-user contact information or evaluate whether they may constitute a fraud risk. For more detailed information on the schema returned, see /identity/get
.
1const { IdentityGetRequest } = require('plaid');23// Pull Identity data for an Item4const request: IdentityGetRequest = {5 access_token: accessToken,6};7try {8 const response = await plaidClient.identityGet(request);9 const identities = response.data.accounts.flatMap(10 (account) => account.owners,11 );12} catch (error) {13 // handle error14}
Example response data is below.
1{2 "accounts": [3 {4 "account_id": "BxBXxLj1m4HMXBm9WZZmCWVbPjX16EHwv99vp",5 "balances": {6 "available": 100,7 "current": 110,8 "iso_currency_code": "USD",9 "limit": null,10 "unofficial_currency_code": null11 },12 "mask": "0000",13 "name": "Plaid Checking",14 "official_name": "Plaid Gold Standard 0% Interest Checking",15 "owners": [16 {17 "addresses": [18 {19 "data": {20 "city": "Malakoff",21 "country": "US",22 "postal_code": "14236",23 "region": "NY",24 "street": "2992 Cameron Road"25 },26 "primary": true27 },28 {29 "data": {30 "city": "San Matias",31 "country": "US",32 "postal_code": "93405-2255",33 "region": "CA",34 "street": "2493 Leisure Lane"35 },36 "primary": false37 }38 ],39 "emails": [40 {41 "data": "accountholder0@example.com",42 "primary": true,43 "type": "primary"44 },45 {46 "data": "accountholder1@example.com",47 "primary": false,48 "type": "secondary"49 }50 ],51 "names": ["Alberta Bobbeth Charleson"],52 "phone_numbers": [53 {54 "data": "1112223333",55 "primary": false,56 "type": "home"57 },58 {59 "data": "1112224444",60 "primary": false,61 "type": "work"62 },63 {64 "data": "1112225555",65 "primary": false,66 "type": "mobile1"67 }68 ]69 }70 ],71 "subtype": "checking",72 "type": "depository"73 }74 ],75 "item": {76 "available_products": ["balance", "credit_details", "investments"],77 "billed_products": [78 "assets",79 "auth",80 "identity",81 "liabilities",82 "transactions"83 ],84 "consent_expiration_time": null,85 "error": null,86 "institution_id": "ins_3",87 "item_id": "eVBnVMp7zdTJLkRNr33Rs6zr7KNJqBFL9DrE6",88 "webhook": "https://www.genericwebhookurl.com/webhook"89 },90 "request_id": "3nARps6TOYtbACO"91}
Tutorial and example code in Plaid Pattern
For a real-life example of an app that incorporates Identity, see the Node-based Plaid Pattern Account Funding sample app. Pattern Account Funding is a sample account funding app that fetches Identity data in order verify identity prior to a funds transfer. The Identity code can be found in items.js.
For a tutorial walkthrough of creating a similar app, see Account funding tutorial.