diff --git a/.changeset/rename-application-id-header.md b/.changeset/rename-application-id-header.md
new file mode 100644
index 0000000..7634bfb
--- /dev/null
+++ b/.changeset/rename-application-id-header.md
@@ -0,0 +1,6 @@
+---
+"@nylas/connect": patch
+---
+
+Changed the header name from `x-nylas-application-public-id` to improve API consistency.
+
diff --git a/packages/nylas-connect/src/connect-client.ts b/packages/nylas-connect/src/connect-client.ts
index 59c7888..5c311cd 100644
--- a/packages/nylas-connect/src/connect-client.ts
+++ b/packages/nylas-connect/src/connect-client.ts
@@ -61,7 +61,7 @@ export class NylasConnect {
   private static readonly NYLAS_CONNECT_VERSION: string = pkg.version;
   private static readonly NYLAS_CONNECT_HEADER = "x-nylas-connect" as const;
   private static readonly NYLAS_APPLICATION_ID_HEADER =
-    "x-nylas-public-application-id" as const;
+    "x-nylas-application-public-id" as const;
 
   constructor(config: ConnectConfig = {}) {
     // Resolve configuration with environment variables and defaults