diff --git a/packages/client/src/ai-model.ts b/packages/client/src/ai-model.ts
index cf23e9d4..f2be6ada 100644
--- a/packages/client/src/ai-model.ts
+++ b/packages/client/src/ai-model.ts
@@ -23,7 +23,7 @@ export const createClientAiModel = (config: {
 }) => {
   switch (config.provider) {
     case "anthropic":
-      return createAnthropic({ baseURL: config.baseUrl, apiKey: config.apiKey, fetch: config.fetch })(config.modelId);
+      return createAnthropic({ baseURL: config.baseUrl, apiKey: config.apiKey, fetch: config.fetch, headers: { "anthropic-dangerous-direct-browser-access": "true" } })(config.modelId);
     case "google":
       return createGoogle({ baseURL: config.baseUrl, apiKey: config.apiKey, fetch: config.fetch })(config.modelId);
     default:
diff --git a/packages/client/src/ai-provider-direct.ts b/packages/client/src/ai-provider-direct.ts
index 9f04ed89..85fe693f 100644
--- a/packages/client/src/ai-provider-direct.ts
+++ b/packages/client/src/ai-provider-direct.ts
@@ -14,6 +14,7 @@ export const discoverAiModels = async (
   if (config.provider === "anthropic") {
     headers.set("x-api-key", config.apiKey);
     headers.set("anthropic-version", "2023-06-01");
+    headers.set("anthropic-dangerous-direct-browser-access", "true");
   } else if (config.provider === "google") {
     headers.set("x-goog-api-key", config.apiKey);
   } else {
diff --git a/packages/client/src/client-only-ai.test.mjs b/packages/client/src/client-only-ai.test.mjs
index 7e7e53ea..ae90f416 100644
--- a/packages/client/src/client-only-ai.test.mjs
+++ b/packages/client/src/client-only-ai.test.mjs
@@ -54,3 +54,23 @@ test("infographic tools and model loop run on the client after credential prepar
   expect(paths).toEqual(["/api/v1/ai/infographic-agent/prepare"]);expect(calls).toBe(2);
   expect(events).toContainEqual({type:"proposal",...proposal});expect(events.at(-1)).toEqual({type:"finish"});
 });
+
+test("Anthropic client generation and model discovery opt in to browser-direct access", async () => {
+  const { buildAiDirectProviderRequest } = await import("@edgeever/shared/ai-generation");
+  const prepared = { ...credential, provider: "anthropic", baseUrl: "https://api.anthropic.com/v1", system: "Reply", prompt: "OK", maxOutputTokens: 16 };
+  const request = buildAiDirectProviderRequest(prepared);
+  expect(request.headers["anthropic-dangerous-direct-browser-access"]).toBe("true");
+  const { createClientAiModel } = await import("./ai-model.ts");
+  const { generateText } = await import("ai");
+  const paths = [];
+  const fetch = async (url, init) => {
+    paths.push(String(url));expect(new Headers(init.headers).get("anthropic-dangerous-direct-browser-access")).toBe("true");
+    if (String(url).endsWith("/models")) return Response.json({ data: [{ id: "claude-test" }] });
+    return Response.json({ id: "msg-1", type: "message", role: "assistant", model: "claude-test", content: [{ type: "text", text: "OK" }], stop_reason: "end_turn", usage: { input_tokens: 1, output_tokens: 1 } });
+  };
+  const result = await generateText({ model: createClientAiModel({ ...prepared, fetch }), prompt: "OK", maxRetries: 0 });
+  expect(result.text).toBe("OK");
+  const { discoverAiModels } = await import("./ai-provider-direct.ts");
+  expect(await discoverAiModels(prepared, fetch)).toEqual([{ modelId: "claude-test", displayName: "claude-test" }]);
+  expect(paths).toHaveLength(2);
+});
diff --git a/packages/shared/src/ai-generation.ts b/packages/shared/src/ai-generation.ts
index dabae9d8..969662a0 100644
--- a/packages/shared/src/ai-generation.ts
+++ b/packages/shared/src/ai-generation.ts
@@ -209,6 +209,7 @@ export const buildAiDirectProviderRequest = (
         accept: "text/event-stream",
         "x-api-key": prepared.apiKey,
         "anthropic-version": "2023-06-01",
+        "anthropic-dangerous-direct-browser-access": "true",
       },
       body: JSON.stringify({
         model: prepared.modelId,