diff --git a/checkpoints/elysia/index.d.ts b/checkpoints/elysia/index.d.ts
new file mode 100644
index 0000000..ce23f68
--- /dev/null
+++ b/checkpoints/elysia/index.d.ts
@@ -0,0 +1,59 @@
+import type { Elysia } from "elysia";
+import Cap from "@cap.js/server";
+
+export interface CapMiddlewareOptions {
+  /**
+   * Duration in hours for which the authentication token remains valid
+   * @default 32
+   */
+  token_validity_hours?: number;
+
+  /**
+   * File path where authentication tokens are stored
+   * @default ".data/middlewareTokens.json"
+   */
+  tokens_store_path?: string;
+
+  /**
+   * Size of the generated token in bytes
+   * @default 16
+   */
+  token_size?: number;
+
+  /**
+   * Path to the HTML template used for verification
+   * @default "./index.html" (relative to middleware file)
+   */
+  verification_template_path?: string;
+
+  /**
+   * Determines how the middleware is applied
+   * @default "global"
+   */
+  scoping?: "global" | "scoped";
+}
+
+export interface TokenValidationResult {
+  success: boolean;
+}
+
+export interface ChallengeRedeemBody {
+  token: string;
+  solutions: unknown[];
+}
+
+export interface ChallengeRedeemResponse {
+  success: boolean;
+  token?: string;
+  expires?: number;
+}
+
+/**
+ * CAP.js middleware for Elysia that provides challenge-based bot protection
+ *
+ * @param userOptions Configuration options for the middleware
+ * @returns An Elysia plugin instance configured with CAP.js protection
+ */
+export declare function capMiddleware(
+  userOptions?: CapMiddlewareOptions,
+): Elysia;