diff --git a/package.json b/package.json
index 23433e5..233b721 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "scripts": {
         "analyze": "tsdown --clean --no-fixed-extension --sourcemap source/index.ts && esbuild-analyzer dist/",
         "build": "tsdown --clean --sourcemap source/index.ts",
-        "dev": "tsx watch source/app.ts",
+        "dev": "tsx watch source/index.ts",
         "docs": "typedoc --hideGenerator --categorizeByGroup",
         "format": "prettier --write . && eslint --fix",
         "spellcheck": "cspell 'source/**' 'test/**' 'playground/**'",
diff --git a/source/services/config.ts b/source/services/config.ts
index 19bdd54..d13c079 100644
--- a/source/services/config.ts
+++ b/source/services/config.ts
@@ -32,7 +32,7 @@ const configSchema = z.object({
             .object({
                 origin: z.string().default('*'),
                 methods: z.array(z.string()).default([ 'GET', 'POST', 'PUT', 'DELETE', 'OPTIONS' ]),
-                allowedHeaders: z.array(z.string()).default([ 'Content-Type', 'cache-control', 'X-Timestamp', 'X-PublicKey', 'X-Signature' ]),
+                allowedHeaders: z.array(z.string()).default([ 'Content-Type', 'cache-control', 'X-Timestamp', 'X-Public-Key', 'X-Signature' ]),
             })
             .partial()
             .prefault({}),
@@ -48,6 +48,11 @@ const configSchema = z.object({
                 .int()
                 .positive()
                 .default(5 * 60 * 1000),
+            uniqueRequestCleanupIntervalMs: z.coerce
+                .number()
+                .int()
+                .positive()
+                .default(10 * 60 * 1000),
         })
         .prefault({}),
 });
@@ -83,6 +88,7 @@ export class Config {
             },
             auth: {
                 timestampWindowMs: process.env.AUTH_TIMESTAMP_WINDOW_MS ? Number(process.env.AUTH_TIMESTAMP_WINDOW_MS) : undefined,
+                uniqueRequestCleanupIntervalMs: process.env.AUTH_UNIQUE_REQUEST_CLEANUP_INTERVAL_MS ? Number(process.env.AUTH_UNIQUE_REQUEST_CLEANUP_INTERVAL_MS) : undefined,
             },
         });
     }
diff --git a/source/services/storage/migrations/001-resources.ts b/source/services/storage/migrations/001-resources.ts
index 27dcf73..b143454 100644
--- a/source/services/storage/migrations/001-resources.ts
+++ b/source/services/storage/migrations/001-resources.ts
@@ -23,8 +23,19 @@ export const up = async (db: Kysely<DatabaseTables>): Promise<void> => {
         .addColumn('public_key', 'text', (col) => col.notNull())
         .addColumn('blob', 'blob', (col) => col.notNull())
         .addColumn('timestamp', 'integer', (col) => col.notNull().defaultTo(millisecondTime))
+        .addColumn('signature', 'text', (col) => col.notNull())
         .addPrimaryKeyConstraint('pk_resource_data', [ 'resource_id', 'public_key' ])
         .execute();
+    
+    // Table for authed requests
+    // We will store the signature and the timestamp of the request, and we will clear out rows that are older than our msTimeout for our auth
+    await db.schema
+        .createTable('authed_requests')
+        .ifNotExists()
+        .addColumn('signature', 'text', (col) => col.notNull())
+        .addColumn('timestamp', 'integer', (col) => col.notNull().defaultTo(millisecondTime))
+        .addPrimaryKeyConstraint('pk_authed_requests', [ 'signature' ])
+        .execute();
 };
 
 /**
@@ -34,5 +45,8 @@ export const up = async (db: Kysely<DatabaseTables>): Promise<void> => {
  */
 export const down = async (db: Kysely<DatabaseTables>): Promise<void> => {
     await db.schema.dropTable('resource_data').ifExists()
-.execute();
+        .execute();
+
+    await db.schema.dropTable('authed_requests').ifExists()
+        .execute();
 };
diff --git a/source/services/storage/tables.ts b/source/services/storage/tables.ts
index d937c28..ee5039d 100644
--- a/source/services/storage/tables.ts
+++ b/source/services/storage/tables.ts
@@ -22,9 +22,22 @@ export interface ResourceDataTable {
 
     /** Millisecond timestamp of the last write. */
     timestamp: Timestamp;
+
+    /** Signature of the write. */
+    signature: string;
+}
+
+export interface AuthedRequestsTable {
+
+    /** Signature of the request. */
+    signature: string;
+
+    /** Millisecond timestamp of the request. */
+    timestamp: Timestamp;
 }
 
 /** Complete Kysely schema mapping for the sync server database. */
 export interface DatabaseTables {
     resource_data: ResourceDataTable;
+    authed_requests: AuthedRequestsTable;
 }
diff --git a/test/services/config.test.ts b/test/services/config.test.ts
index 6100e28..eb68f46 100644
--- a/test/services/config.test.ts
+++ b/test/services/config.test.ts
@@ -18,7 +18,7 @@ const testConfigDefaultsTo1MiBRequestBodyLimit = (): void => {
     expect(config.server.host).toBe('0.0.0.0');
     expect(config.server.cors.origin).toBe('*');
     expect(config.server.cors.methods).toEqual([ 'GET', 'POST', 'PUT', 'DELETE', 'OPTIONS' ]);
-    expect(config.server.cors.allowedHeaders).toEqual([ 'Content-Type', 'cache-control', 'X-Timestamp', 'X-PublicKey', 'X-Signature' ]);
+    expect(config.server.cors.allowedHeaders).toEqual([ 'Content-Type', 'cache-control', 'X-Timestamp', 'X-Public-Key', 'X-Signature' ]);
     expect(config.auth.timestampWindowMs).toBe(300000);
 };