diff --git a/README.md b/README.md
index 39c82e7..1cfa48e 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ account with trade intelligence enabled.
 ├── .claude-plugin/marketplace.json   # Claude Code and Copilot marketplace
 ├── .cursor-plugin/marketplace.json   # Cursor marketplace
 ├── openai/review.json                # OpenAI directory review cases, merged into the ZIP
-├── openai/listing.json               # OpenAI package name, version, and category for the existing plugin
+├── openai/listing.json               # OpenAI package name, version, category, and MCP URL for the existing plugin
 ├── scripts/
 │   ├── build-openai-zip.mjs          # Builds the OpenAI directory ZIP
 │   └── validate.mjs
diff --git a/openai/listing.json b/openai/listing.json
index 052da8a..b5517d2 100644
--- a/openai/listing.json
+++ b/openai/listing.json
@@ -1,5 +1,6 @@
 {
   "name": "app-69f5795de4a48191a35dc5c448520676",
   "version": "1.1.0",
-  "category": "Business & Operations"
+  "category": "Business & Operations",
+  "mcpUrl": "https://mcp.terminal49.com/"
 }
diff --git a/scripts/build-openai-zip.mjs b/scripts/build-openai-zip.mjs
index e778d16..cdc029c 100644
--- a/scripts/build-openai-zip.mjs
+++ b/scripts/build-openai-zip.mjs
@@ -33,7 +33,10 @@ await writeStaged(
   `${JSON.stringify({ ...manifest, name: listing.name, version: listing.version, interface: { ...manifest.interface, category: listing.category }, extensions: { "com.openai": { review, publication } } }, null, 2)}\n`,
 );
 // The Codex-format .mcp.json in the submission guide names only the url.
-const servers = Object.fromEntries(Object.entries(mcp.mcpServers).map(([name, { url }]) => [name, { url }]));
+// OpenAI requires the ZIP's MCP URL to match the existing app's URL exactly.
+const servers = Object.fromEntries(
+  Object.entries(mcp.mcpServers).map(([name, { url }]) => [name, { url: listing.mcpUrl ?? url }]),
+);
 await writeStaged(".mcp.json", `${JSON.stringify({ mcpServers: servers }, null, 2)}\n`);
 await cp(join(pluginDir, "skills"), join(stage, "skills"), { recursive: true });
 for (const icon of icons) await cp(join(pluginDir, icon), join(stage, icon));
@@ -69,6 +72,9 @@ for (const file of zipped) {
 if (!/^[a-z0-9]+(-[a-z0-9]+)*$/.test(listing.name ?? "") || listing.name.length > 64) {
   errors.push("openai/listing.json name must be the OpenAI package name");
 }
+if (listing.mcpUrl !== undefined && !/^https:\/\/mcp\.terminal49\.com(\/[a-z]*)?$/.test(listing.mcpUrl)) {
+  errors.push("openai/listing.json mcpUrl must be a Terminal49 MCP https URL");
+}
 if (!listing.category) errors.push("openai/listing.json category must match the dashboard category title");
 if (!/^\d+\.\d+\.\d+$/.test(listing.version ?? "")) errors.push("openai/listing.json version must be semver");
 if (Object.keys(servers).length !== 1) errors.push("the ZIP must declare exactly one MCP server");