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Upgrading @clerk/fastify to Core 2

Core 2 is included in the Fastify SDK starting with version 1. This release ships with a variety of smaller DX improvements and housekeeping items. Each of the potentially breaking changes are detailed in this guide, below.

By the end of this guide, you’ll have successfully upgraded your Fastify project to use @clerk/fastify v5. You’ll learn how to update your dependencies, resolve breaking changes, and find deprecations. Step-by-step instructions will lead you through the process.

Preparing to upgrade

Before upgrading, it's highly recommended that you update your Clerk SDKs to the latest Core 1 version (npm i @clerk/fastify@0). Some changes required for Core 2 SDKs can be applied incrementally to the v1 release, which should contribute to a smoother upgrading experience. After updating, look out for deprecation messages in your terminal and browser console. By resolving these deprecations you'll be able to skip many breaking changes from Core 2.

Additionally, some of the minimum version requirements for some base dependencies have been updated such that versions that are no longer supported or are at end-of-life are no longer guaranteed to work correctly with Clerk.

Updating Node.js

You need to have Node.js 18.17.0 or later installed. Last year, Node.js 16 entered EOL (End of life) status, so support for this version has been removed across Clerk SDKs. You can check your Node.js version by running node -v in your terminal. Learn more about how to update and install Node.js.

Updating to Core 2

Whenever you feel ready, go ahead and install the latest version of any Clerk SDKs you are using. Make sure that you are prepared to patch some breaking changes before your app will work properly, however. The commands below demonstrate how to install the latest version.

terminal
npm install @clerk/fastify
terminal
yarn add @clerk/fastify
terminal
pnpm add @clerk/fastify

CLI upgrade helper

Clerk now provides a @clerk/upgrade CLI tool that you can use to ease the upgrade process. The tool will scan your codebase and produce a list of changes you'll need to apply to your project. It should catch the vast majority of the changes needed for a successful upgrade to any SDK including Core 2. This can save you a lot of time reading through changes that don't apply to your project.

To run the CLI tool, navigate to your project and run it in the terminal:

terminal
npx @clerk/upgrade
terminal
yarn dlx @clerk/upgrade
terminal
pnpm dlx @clerk/upgrade

If you are having trouble with npx, it's also possible to install directly with npm i @clerk/upgrade -g, and can then be run with the clerk-upgrade command.

Breaking Changes

Removed: orgs claim on JWT

In the previous version of Clerk's SDKs, if you decode the session token that Clerk returns from the server, you'll currently find an orgs claim on it. It lists all the orgs associated with the given user. Now, Clerk returns the org_id, org_slug, and org_role of the active organization.

The orgs claim was part of the JwtPayload. Here are a few examples of where the JwtPayload could be found.

Next.js
Next.js
import { getAuth } from '@clerk/nextjs/server'
const claims: JwtPayload = getAuth(request).sessionClaims

import { getAuth } from '@clerk/ssr.server'
const claims: JwtPayload = (await getAuth(request)).sessionClaims
Fastify
Fastify
import { getAuth } from '@clerk/fastify'
const claims: JwtPayload = (await getAuth(request)).sessionClaims
@clerk/backend
@clerk/backend
import { createClerkClient } from '@clerk/backend'

const clerkClient = createClerkClient({ secretKey: '' })
const requestState = await clerkClient.authenticateRequest(request, { publishableKey: '' })
const claims: JwtPayload = requestState.toAuth().sessionClaims
@clerk/clerk-sdk-node

Caution

On January 8, 2025, the Node SDK will no longer be available. Upgrade to the Express SDK.

@clerk/clerk-sdk-node
import { clerkClient } from '@clerk/clerk-sdk-node'

router.use((...args) => clerkClient.expressRequireAuth()(...args))
router.get('/me', async (req, reply: Response) => {
  return reply.json({ auth: req.auth })
})

If you would like to have your JWT return all of the user's organizations, you can create a custom JWT template in your dashboard. Add { "orgs": "user.organizations" } to it.

Image URL Name Consolidation

There are a number of Clerk primitives that contain images, and previously they each had different property names, like avatarUrl, logoUrl, profileImageUrl, etc. In order to promote consistency and make it simpler for developers to know where to find associated images, all image properties are now named imageUrl. See the list below for all affected classes:

Organization.logoUrl -> Organization.imageUrl

The logoUrl property of any Organization object has been changed to imageUrl.

User.profileImageUrl -> .imageUrl

The profileImageUrl property of any User object has been changed to imageUrl.

ExternalAccount.avatarUrl -> .imageUrl

The avatarUrl property of any ExternalAccount object has been changed to imageUrl.

OrganizationMembershipPublicUserData.profileImageUrl -> .imageUrl

The profileImageUrl property of any OrganizationMembershipPublicUserData object has been changed to imageUrl.

Deprecation removals & housekeeping

As part of this major version, a number of previously deprecated props, arguments, methods, etc. have been removed. Additionally there have been some changes to things that are only used internally, or only used very rarely. It's highly unlikely that any given app will encounter any of these items, but they are all breaking changes, so they have all been documented below.

Note

For this section more than any other one, use the CLI upgrade tool (npx @clerk/upgrade). Changes in this section are very unlikely to appear in your codebase, the tool will save time looking for them.

Deprecation removals

User.update({ password: 'x' }) -> User.updatePassword('x')

If you are updating a user's password via the User.update method, it must be changed to User.updatePassword instead. This method will require the current password as well as the desired new password. We made this update to improve the security of password changes. Example below:

user.update({ password: 'foo' })

user.updatePassword({
  currentPassword: 'bar',
  newPassword: 'foo',
  signOutOfOtherSessions: true,
})
CLERK_API_KEY replaced by CLERK_SECRET_KEY

The CLERK_API_KEY environment variable was renamed to CLERK_SECRET_KEY. To update, go to the API keys page in the Clerk Dashboard. After choosing your framework, copy and paste the new keys. Ensure this update is applied across all environments (e.g., development, staging, production).

CLERK_FRONTEND_API replaced by CLERK_PUBLISHABLE_KEY

The CLERK_FRONTEND_API environment variable was renamed to CLERK_PUBLISHABLE_KEY. To update, go to the API keys page in the Clerk Dashboard. After choosing your framework, copy and paste the new keys. Ensure this update is applied across all environments (e.g., development, staging, production). Note: The values are different, so this isn't just a key replacement. More information.

apiKey -> secretKey as param to createClerkClient

The apiKey argument passed to createClerkClient must be changed to secretKey.

import { createClerkClient } from '@clerk/fastify'

createClerkClient({ apiKey: '...' })
createClerkClient({ secretKey: '...' })
frontendApi -> publishableKey as param to createClerkClient

The frontendApi argument passed to createClerkClient must be changed to publishableKey. Note that the values of the two keys are different, so both keys and values need to be changed. You can find your application's Publishable Key in the Clerk Dashboard.

import { createClerkClient } from '@clerk/fastify'

createClerkClient({ frontendApi: '...' })
createClerkClient({ publishableKey: '...' })
frontendApi -> publishableKey as param to clerkPlugin

The frontendApi argument passed to clerkPlugin must be changed to publishableKey. Note that the values of the two keys are different, so both keys and values need to be changed. You can find your application's Publishable Key in the Clerk Dashboard.

import { clerkPlugin } from '@clerk/fastify'

fastify.register(clerkPlugin, { frontendApi: '...' })
fastify.register(clerkPlugin, { publishableKey: '...' })

Other Breaking changes

Organization.getRoles arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await organization.getRoles({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
Organization.getMemberships arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await organization.getMemberships({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
Organization.getDomains arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await organization.getDomains({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
Organization.getInvitations arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await organization.getInvitations({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
Organization.getMembershipRequests arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await organization.getMembershipRequests({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
User.getOrganizationInvitations arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await user.getOrganizationInvitations({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
User.getOrganizationSuggestions arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await user.getOrganizationSuggestions({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
User.getOrganizationMemberships arguments changed

There have been a couple changes to the pagination arguments that can be passed into this function - limit has been renamed to pageSize, and offset has been renamed to initialPage. This will help to make it more clear and simple to reason about pagination control. Example of how changes might look below:

const { data } = await user.getOrganizationMemberships({
  limit: 10,
  pageSize: 10,
  offset: 10,
  initialPage: 2,
})
Users.getOrganizationMembershipList return signature changed

The response payload of Users.getOrganizationMembershipList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.users.getOrganizationMembershipList()
const { data, totalCount } = await clerkClient.users.getOrganizationMembershipList()
Users.getOrganizationInvitationList return signature changed

The response payload of Users.getOrganizationInvitationList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.users.getOrganizationInvitationList()
const { data, totalCount } = await clerkClient.users.getOrganizationInvitationList()
Organizations.getOrganizationInvitationList return type changed

The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since the Clerk API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:

const data = await clerkClient.organizations.getOrganizationInvitationList({
  organizationId: '...',
})

data.forEach(() => {})
data.data.forEach(() => {})
User.getOrganizationMembershipList return type changed

The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since the Clerk API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:

const { user } = useUser()
const membershipList = user.getOrganizationMembershipList()

membershipList.forEach(() => {})
membershipList.data.forEach(() => {})
Users.getOrganizationList return signature changed

The response payload of Users.getOrganizationList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.users.getOrganizationList()
const { data, totalCount } = await clerkClient.users.getOrganizationList()
Organization.getOrganizationList return type changed

The return type for this function was previously [Items] but has now been updated to { data: [Items], totalCount: number }. Since the Clerk API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily. A before/after code example can be seen below:

const { organization } = useOrganization()
const orgList = organization.getOrganizationList()

orgList.forEach(() => {})
orgList.data.forEach(() => {})
Invitations.getInvitationList return signature changed

The response payload of Invitations.getInvitationList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.invitations.getInvitationList()
const { data, totalCount } = await clerkClient.invitations.getInvitationList()
Sessions.getSessionList return signature changed

The response payload of Sessions.getSessionList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.sessions.getSessionList()
const { data, totalCount } = await clerkClient.sessions.getSessionList()
Users.getUserList return signature changed

The response payload of Users.getUserList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.users.getUserList()
const { data, totalCount } = await clerkClient.users.getUserList()
AllowlistIdentifiers.getAllowlistIdentifierList return signature changed

The response payload of AllowlistIdentifiers.getAllowlistIdentifierList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.allowlistIdentifiers.getAllowlistIdentifierList()
const { data, totalCount } = await clerkClient.allowlistIdentifiers.getAllowlistIdentifierList()
Clients.getClientList return signature changed

The response payload of Clients.getClientList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.clients.getClientList()
const { data, totalCount } = await clerkClient.allowlistIdentifiers.getClientList()
RedirectUrls.getRedirectUrlList return signature changed

The response payload of RedirectUrls.getRedirectUrlList was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.redirectUrls.getRedirectUrlList()
const { data, totalCount } = await clerkClient.redirectUrls.getRedirectUrlList()
Users.getUserOauthAccessToken return signature changed

The response payload of Users.getUserOauthAccessToken was changed as part of the core 2 release. Rather than directly returning data, the return signature is now { data, totalCount }. Since Backend API responses are paginated, the totalCount property is helpful in determining the total number of items in the response easily, and this change in the backend SDK aligns the response shape with what the Backend API returns directly.

Here's an example of how the response shape would change with this modification:

const data = await clerkClient.users.getUserOauthAccessToken()
const { data, totalCount } = await clerkClient.users.getUserOauthAccessToken()
API_URL value has changed

The value of this export has changed from https://api.clerk.dev to https://api.clerk.com. If you were relying on the text content of this value not changing, you may need to make adjustments.

Clerk -> { createClerkClient }

The Clerk default import has changed to createClerkClient and been moved to a named import rather than default. You must update your import path in order for it to work correctly. Example below of the fix that needs to be made:

import Clerk from '@clerk/fastify'
import { createClerkClient } from '@clerk/fastify'

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