diff --git a/src/common/config.ts b/src/common/config.ts
index 8702c96e2..f905c4f4e 100644
--- a/src/common/config.ts
+++ b/src/common/config.ts
@@ -101,7 +101,7 @@ interface Options {
     configuration: Record<string, boolean>;
 }
 
-const ALL_CONFIG_KEYS = new Set(
+export const ALL_CONFIG_KEYS = new Set(
     (OPTIONS.string as readonly string[])
         .concat(OPTIONS.array)
         .concat(OPTIONS.boolean)
diff --git a/src/lib.ts b/src/lib.ts
index bb2a631ea..c81472e0b 100644
--- a/src/lib.ts
+++ b/src/lib.ts
@@ -1,6 +1,6 @@
 export { Server, type ServerOptions } from "./server.js";
 export { Session, type SessionOptions } from "./common/session.js";
-export { defaultUserConfig, type UserConfig } from "./common/config.js";
+export { defaultUserConfig, type UserConfig, ALL_CONFIG_KEYS as configurableProperties } from "./common/config.js";
 export { LoggerBase, type LogPayload, type LoggerType, type LogLevel } from "./common/logger.js";
 export { StreamableHttpRunner } from "./transports/streamableHttp.js";
 export {