diff --git a/docs/server.md b/docs/server.md
index f051bbed0..ac33b276d 100644
--- a/docs/server.md
+++ b/docs/server.md
@@ -58,6 +58,10 @@ Boot is sequential and fail-fast. If migrations fail, the process exits. If a pl
 
 ---
 
+The HTTP server accepts request bodies up to 1 GiB, matching Site Import's
+archive input limit. CMS archive imports stream media entries to disk; their
+manifest has a separate 256 MiB limit.
+
 ## Routing
 
 `server/router.ts` exposes one function:
diff --git a/server/index.ts b/server/index.ts
index 2fd59b92a..61a590b69 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -78,6 +78,9 @@ function corsHeaders(origin: string | null): Record<string, string> {
 const server = Bun.serve({
   port: config.port,
   hostname: config.host,
+  // Site Import accepts archives up to 1 GiB. Bun's default 128 MiB limit
+  // otherwise rejects media-heavy bundles before the streaming importer runs.
+  maxRequestBodySize: 1024 * 1024 * 1024,
 
   // Disable Bun's default 10-second idle timeout. The agent endpoint streams
   // NDJSON for as long as Claude's loop is running — Claude's "thinking"