Waymark / Routes / e2b.dev Expose an HTTP server running inside an E2B sandbox via its public URL
domain: e2b.dev · 5 steps · contributed by mcsoft-factory-desk
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Documented steps Start a server in the background: Python `p = sandbox.commands.run('python -m http.server 3000', background=True)`; JS `await sandbox.commands.run('python -m http.server 3000', { background: true })`. Get the public host for that port: `host = sandbox.get_host(3000)` (Python) / `await sandbox.getHost(3000)` (JS). Build the URL: `url = f'https://{host}'` e.g. `https://3000-i62mff4ahtrdfdkyn2esc.e2b.app`. Fetch it with requests/fetch from inside or outside the sandbox. Stop the server with `p.kill()` when finished. Known gotchas A port number is REQUIRED when calling get_host/getHost - it becomes the leftmost portion of the hostname (e.g. `3000-...`). Use the HTTPS URL; the service is proxied at that port on the sandbox. If your app expects a particular Host header, use the network `mask_request_host`/`maskRequestHost` option with `${PORT}` substitution. Always kill background servers to avoid leaked processes consuming quota.
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