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feat(fastify): Add Frontend API proxy support #7995

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feat(fastify): Add Frontend API proxy support #7995

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c056d3a
feat(fastify): add Frontend API proxy support
nikosdouvlis Mar 5, 2026
019c669
merge main and resolve conflicts
nikosdouvlis Mar 11, 2026
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5 changes: 5 additions & 0 deletions .changeset/fastify-proxy-support.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'@clerk/fastify': minor
---

Add Frontend API proxy support to `@clerk/fastify` via the `frontendApiProxy` option on `clerkPlugin`. When enabled, requests matching the proxy path (default `/__clerk`) are forwarded to Clerk's Frontend API, allowing Clerk to work in environments where direct API access is blocked by ad blockers or firewalls. The `proxyUrl` for auth handshake is automatically derived from the request when `frontendApiProxy` is configured.
20 changes: 0 additions & 20 deletions packages/fastify/src/__tests__/__snapshots__/clerkClient.test.ts.snap
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15 changes: 0 additions & 15 deletions packages/fastify/src/__tests__/__snapshots__/constants.test.ts.snap
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Expand Up @@ -15,18 +15,3 @@ exports[`constants > from environment variables 1`] = `
"SECRET_KEY": "TEST_SECRET_KEY",
}
`;

exports[`constants from environment variables 1`] = `
{
"API_URL": "CLERK_API_URL",
"API_VERSION": "CLERK_API_VERSION",
"JWT_KEY": "CLERK_JWT_KEY",
"PUBLISHABLE_KEY": "CLERK_PUBLISHABLE_KEY",
"SDK_METADATA": {
"environment": "test",
"name": "@clerk/fastify",
"version": "0.0.0-test",
},
"SECRET_KEY": "CLERK_SECRET_KEY",
}
`;
14 changes: 0 additions & 14 deletions packages/fastify/src/__tests__/__snapshots__/getAuth.test.ts.snap
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Expand Up @@ -13,17 +13,3 @@ For more info, check out the docs: https://clerk.com/docs,
or come say hi in our discord server: https://clerk.com/discord
]
`;

exports[`getAuth(req) throws error if clerkPlugin is on registered 1`] = `
"🔒 Clerk: The "clerkPlugin" should be registered before using the "getAuth".
Example:

import { clerkPlugin } from '@clerk/fastify';

const server: FastifyInstance = Fastify({ logger: true });
server.register(clerkPlugin);

For more info, check out the docs: https://clerk.com/docs,
or come say hi in our discord server: https://clerk.com/discord
"
`;
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