diff --git a/fern/scripts/prepare-openapi.ts b/fern/scripts/prepare-openapi.ts
new file mode 100644
index 00000000..d449f221
--- /dev/null
+++ b/fern/scripts/prepare-openapi.ts
@@ -0,0 +1,218 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+import { omit } from 'lodash';
+import { execSync } from 'child_process';
+import { merge, isErrorResult } from 'openapi-merge';
+import type { Swagger } from 'atlassian-openapi';
+import { RESTRICTED_ROUTE_BASE_PATHS } from '@letta-cloud/sdk-core';
+
+const lettaWebOpenAPIPath = path.join(
+  __dirname,
+  '..',
+  '..',
+  '..',
+  'web',
+  'autogenerated',
+  'letta-web-openapi.json',
+);
+const lettaAgentsAPIPath = path.join(
+  __dirname,
+  '..',
+  '..',
+  'letta',
+  'server',
+  'openapi_letta.json',
+);
+
+const lettaWebOpenAPI = JSON.parse(
+  fs.readFileSync(lettaWebOpenAPIPath, 'utf8'),
+) as Swagger.SwaggerV3;
+const lettaAgentsAPI = JSON.parse(
+  fs.readFileSync(lettaAgentsAPIPath, 'utf8'),
+) as Swagger.SwaggerV3;
+
+// removes any routes that are restricted
+lettaAgentsAPI.paths = Object.fromEntries(
+  Object.entries(lettaAgentsAPI.paths).filter(([path]) =>
+    RESTRICTED_ROUTE_BASE_PATHS.every(
+      (restrictedPath) => !path.startsWith(restrictedPath),
+    ),
+  ),
+);
+
+const lettaAgentsAPIWithNoEndslash = Object.keys(lettaAgentsAPI.paths).reduce(
+  (acc, path) => {
+    const pathWithoutSlash = path.endsWith('/')
+      ? path.slice(0, path.length - 1)
+      : path;
+    acc[pathWithoutSlash] = lettaAgentsAPI.paths[path];
+    return acc;
+  },
+  {} as Swagger.SwaggerV3['paths'],
+);
+
+// remove duplicate paths, delete from letta-web-openapi if it exists in sdk-core
+// some paths will have an extra / at the end, so we need to remove that as well
+lettaWebOpenAPI.paths = Object.fromEntries(
+  Object.entries(lettaWebOpenAPI.paths).filter(([path]) => {
+    const pathWithoutSlash = path.endsWith('/')
+      ? path.slice(0, path.length - 1)
+      : path;
+    return !lettaAgentsAPIWithNoEndslash[pathWithoutSlash];
+  }),
+);
+
+const agentStatePathsToOverride: Array<[string, string]> = [
+  ['/v1/templates/{project}/{template_version}/agents', '201'],
+  ['/v1/agents/search', '200'],
+];
+
+for (const [path, responseCode] of agentStatePathsToOverride) {
+  if (lettaWebOpenAPI.paths[path]?.post?.responses?.[responseCode]) {
+    // Get direct reference to the schema object
+    const responseSchema =
+      lettaWebOpenAPI.paths[path].post.responses[responseCode];
+    const contentSchema = responseSchema.content['application/json'].schema;
+
+    // Replace the entire agents array schema with the reference
+    if (contentSchema.properties?.agents) {
+      contentSchema.properties.agents = {
+        type: 'array',
+        items: {
+          $ref: '#/components/schemas/AgentState',
+        },
+      };
+    }
+  }
+}
+
+// go through the paths and remove "user_id"/"actor_id" from the headers
+for (const path of Object.keys(lettaAgentsAPI.paths)) {
+  for (const method of Object.keys(lettaAgentsAPI.paths[path])) {
+    // @ts-expect-error - a
+    if (lettaAgentsAPI.paths[path][method]?.parameters) {
+      // @ts-expect-error - a
+      lettaAgentsAPI.paths[path][method].parameters = lettaAgentsAPI.paths[
+        path
+      ][method].parameters.filter(
+        (param: Record<string, string>) =>
+          param.in !== 'header' ||
+          (
+            param.name !== 'user_id' &&
+            param.name !== 'User-Agent' &&
+            param.name !== 'X-Project-Id' &&
+            param.name !== 'X-Stainless-Package-Version' &&
+            !param.name.startsWith('X-Experimental')
+          ),
+      );
+    }
+  }
+}
+
+const result = merge([
+  {
+    oas: lettaAgentsAPI,
+  },
+  {
+    oas: lettaWebOpenAPI,
+  },
+]);
+
+if (isErrorResult(result)) {
+  console.error(`${result.message} (${result.type})`);
+  process.exit(1);
+}
+
+result.output.openapi = '3.1.0';
+result.output.info = {
+  title: 'Letta API',
+  version: '1.0.0',
+};
+
+result.output.servers = [
+  {
+    url: 'https://app.letta.com',
+    description: 'Letta Cloud',
+  },
+  {
+    url: 'http://localhost:8283',
+    description: 'Self-hosted',
+  },
+];
+
+result.output.components = {
+  ...result.output.components,
+  securitySchemes: {
+    bearerAuth: {
+      type: 'http',
+      scheme: 'bearer',
+    },
+  },
+};
+
+result.output.security = [
+  ...(result.output.security || []),
+  {
+    bearerAuth: [],
+  },
+];
+
+// omit all instances of "user_id" from the openapi.json file
+function deepOmitPreserveArrays(obj: unknown, key: string): unknown {
+  if (Array.isArray(obj)) {
+    return obj.map((item) => deepOmitPreserveArrays(item, key));
+  }
+
+  if (typeof obj !== 'object' || obj === null) {
+    return obj;
+  }
+
+  if (key in obj) {
+    return omit(obj, key);
+  }
+
+  return Object.fromEntries(
+    Object.entries(obj).map(([k, v]) => [k, deepOmitPreserveArrays(v, key)]),
+  );
+}
+
+// eslint-disable-next-line  @typescript-eslint/ban-ts-comment
+// @ts-ignore
+result.output.components = deepOmitPreserveArrays(
+  result.output.components,
+  'user_id',
+);
+
+// eslint-disable-next-line  @typescript-eslint/ban-ts-comment
+// @ts-ignore
+result.output.components = deepOmitPreserveArrays(
+  result.output.components,
+  'actor_id',
+);
+
+// eslint-disable-next-line  @typescript-eslint/ban-ts-comment
+// @ts-ignore
+result.output.components = deepOmitPreserveArrays(
+  result.output.components,
+  'organization_id',
+);
+
+fs.writeFileSync(
+  path.join(__dirname, '..', 'openapi.json'),
+  JSON.stringify(result.output, null, 2),
+);
+
+function formatOpenAPIJson() {
+  const openApiPath = path.join(__dirname, '..', 'openapi.json');
+
+  try {
+    execSync(`npx prettier --write "${openApiPath}"`, { stdio: 'inherit' });
+    console.log('Successfully formatted openapi.json with Prettier');
+  } catch (error) {
+    console.error('Error formatting openapi.json:', error);
+    process.exit(1);
+  }
+}
+
+formatOpenAPIJson();
diff --git a/letta/server/rest_api/dependencies.py b/letta/server/rest_api/dependencies.py
index d6c87466..aa2888d7 100644
--- a/letta/server/rest_api/dependencies.py
+++ b/letta/server/rest_api/dependencies.py
@@ -20,6 +20,7 @@ class HeaderParams(BaseModel):
     actor_id: Optional[str] = None
     user_agent: Optional[str] = None
     project_id: Optional[str] = None
+    sdk_version: Optional[str] = None
     experimental_params: Optional[ExperimentalParams] = None
 
 
@@ -27,6 +28,7 @@ def get_headers(
     actor_id: Optional[str] = Header(None, alias="user_id"),
     user_agent: Optional[str] = Header(None, alias="User-Agent"),
     project_id: Optional[str] = Header(None, alias="X-Project-Id"),
+    sdk_version: Optional[str] = Header(None, alias="X-Stainless-Package-Version"),
     message_async: Optional[str] = Header(None, alias="X-Experimental-Message-Async"),
     letta_v1_agent: Optional[str] = Header(None, alias="X-Experimental-Letta-V1-Agent"),
 ) -> HeaderParams:
@@ -35,6 +37,7 @@ def get_headers(
         actor_id=actor_id,
         user_agent=user_agent,
         project_id=project_id,
+        sdk_version=sdk_version,
         experimental_params=ExperimentalParams(
             message_async=(message_async == "true") if message_async else None,
             letta_v1_agent=(letta_v1_agent == "true") if letta_v1_agent else None,
diff --git a/letta/utils.py b/letta/utils.py
index b5b619e5..184a98fb 100644
--- a/letta/utils.py
+++ b/letta/utils.py
@@ -41,6 +41,7 @@ from letta.helpers.json_helpers import json_dumps, json_loads
 from letta.log import get_logger
 from letta.otel.tracing import log_attributes, trace_method
 from letta.schemas.openai.chat_completion_response import ChatCompletionResponse
+from letta.server.rest_api.dependencies import HeaderParams
 
 logger = get_logger(__name__)
 
@@ -1400,3 +1401,51 @@ def fire_and_forget(coro, task_name: Optional[str] = None, error_callback: Optio
 
     task.add_done_callback(callback)
     return task
+
+
+def is_1_0_sdk_version(headers: HeaderParams):
+    """
+    Check if the SDK version is 1.0.0 or above.
+    1. If sdk_version is provided from stainless (all stainless versions are 1.0.0+)
+    2. If user_agent is provided and in the format
+        @letta-ai/letta-client/version (node) or
+        letta-client/version (python)
+    """
+    sdk_version = headers.sdk_version
+    if sdk_version:
+        return True
+
+    client = headers.user_agent
+    if "/" not in client:
+        return False
+
+    # Split into parts to validate format
+    parts = client.split("/")
+
+    # Should have at least 2 parts (client-name/version)
+    if len(parts) < 2:
+        return False
+
+    if len(parts) == 3:
+        # Format: @letta-ai/letta-client/version
+        if parts[0] != "@letta-ai" or parts[1] != "letta-client":
+            return False
+    elif len(parts) == 2:
+        # Format: letta-client/version
+        if parts[0] != "letta-client":
+            return False
+    else:
+        return False
+
+    # Extract and validate version
+    maybe_version = parts[-1]
+    if "." not in maybe_version:
+        return False
+
+    # Extract major version (handle alpha/beta suffixes like 1.0.0-alpha.2 or 1.0.0a5)
+    version_base = maybe_version.split("-")[0].split("a")[0].split("b")[0]
+    if "." not in version_base:
+        return False
+
+    major_version = version_base.split(".")[0]
+    return major_version == "1"
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 225dcec4..bf89ed0b 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -3,9 +3,10 @@ import pytest
 from letta.constants import MAX_FILENAME_LENGTH
 from letta.functions.ast_parsers import coerce_dict_args_by_annotations, get_function_annotations_from_source
 from letta.schemas.file import FileMetadata
+from letta.server.rest_api.dependencies import HeaderParams
 from letta.services.file_processor.chunker.line_chunker import LineChunker
 from letta.services.helpers.agent_manager_helper import safe_format
-from letta.utils import sanitize_filename, validate_function_response
+from letta.utils import is_1_0_sdk_version, sanitize_filename, validate_function_response
 
 CORE_MEMORY_VAR = "My core memory is that I like to eat bananas"
 VARS_DICT = {"CORE_MEMORY": CORE_MEMORY_VAR}
@@ -669,3 +670,15 @@ def test_validate_function_response_whitespace():
     """Test whitespace-only string handling"""
     response = validate_function_response("   \n\t  ", return_char_limit=100)
     assert response == "   \n\t  "
+
+
+def test_sdk_version_check():
+    """Test SDK version check"""
+    assert not is_1_0_sdk_version(HeaderParams(user_agent="letta-client/0.0.200"))
+    assert is_1_0_sdk_version(HeaderParams(user_agent="letta-client/1.0.0a5"))
+    assert not is_1_0_sdk_version(HeaderParams(user_agent="@letta-ai/letta-client/0.0.200"))
+    assert is_1_0_sdk_version(HeaderParams(user_agent="@letta-ai/letta-client/1.0.0-alpha.5"))
+    assert is_1_0_sdk_version(HeaderParams(sdk_version="v1.0.0"))
+    assert is_1_0_sdk_version(HeaderParams(sdk_version="v1.0.0-alpha.7"))
+    assert is_1_0_sdk_version(HeaderParams(sdk_version="v1.0.0a7"))
+    assert is_1_0_sdk_version(HeaderParams(sdk_version="v2.0.0"))