diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b55fa135..b681d9a9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "9.4.1"
+  ".": "9.5.0"
 }
diff --git a/.stats.yml b/.stats.yml
index 91f464e0..5b71b33a 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 46
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/finch%2Ffinch-63947213d9359808abc05e4c3cb53389325ca23c58d06bf293626f7d5d4fc2b8.yml
-openapi_spec_hash: 50e4669590de9a411915a612615017d0
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/finch%2Ffinch-a1778dd040aadddb53b90df5959043d17a5c9899f82c9c7188cd0be810426dc3.yml
+openapi_spec_hash: fe60fcf302d80a604a49ec1bf5068881
 config_hash: d21a244fc073152c8dbecb8ece970209
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2dbe386..e6442d93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## 9.5.0 (2026-04-10)
+
+Full Changelog: [v9.4.1...v9.5.0](https://github.com/Finch-API/finch-api-node/compare/v9.4.1...v9.5.0)
+
+### Features
+
+* **api:** api update ([c7b1cbd](https://github.com/Finch-API/finch-api-node/commit/c7b1cbdd3b9ac244868c5c607cecfe6cae131563))
+
+
+### Chores
+
+* **internal:** codegen related update ([f00da2e](https://github.com/Finch-API/finch-api-node/commit/f00da2ec14ce454259e2a9040873be59896a8334))
+* **internal:** show error causes in MCP servers when running in local mode ([81a144e](https://github.com/Finch-API/finch-api-node/commit/81a144ea0a2f27f76e3879fbb809c56d8838fba7))
+* **mcp-server:** increase local docs search result count from 5 to 10 ([0a41abc](https://github.com/Finch-API/finch-api-node/commit/0a41abcf925d5568ee6705a1b724645e4fa60575))
+
 ## 9.4.1 (2026-04-06)
 
 Full Changelog: [v9.4.0...v9.4.1](https://github.com/Finch-API/finch-api-node/compare/v9.4.0...v9.4.1)
diff --git a/package.json b/package.json
index 074e02d9..5ff4fe1c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tryfinch/finch-api",
-  "version": "9.4.1",
+  "version": "9.5.0",
   "description": "The official TypeScript library for the Finch API",
   "author": "Finch <founders@tryfinch.com>",
   "types": "dist/index.d.ts",
diff --git a/packages/mcp-server/manifest.json b/packages/mcp-server/manifest.json
index 96fa85e5..7244b482 100644
--- a/packages/mcp-server/manifest.json
+++ b/packages/mcp-server/manifest.json
@@ -1,7 +1,7 @@
 {
   "dxt_version": "0.2",
   "name": "@tryfinch/finch-api-mcp",
-  "version": "9.4.1",
+  "version": "9.5.0",
   "description": "The official MCP Server for the Finch API",
   "author": {
     "name": "Finch",
diff --git a/packages/mcp-server/package.json b/packages/mcp-server/package.json
index 69941b10..2eab9d7e 100644
--- a/packages/mcp-server/package.json
+++ b/packages/mcp-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@tryfinch/finch-api-mcp",
-  "version": "9.4.1",
+  "version": "9.5.0",
   "description": "The official MCP Server for the Finch API",
   "author": "Finch <founders@tryfinch.com>",
   "types": "dist/index.d.ts",
diff --git a/packages/mcp-server/src/code-tool-worker.ts b/packages/mcp-server/src/code-tool-worker.ts
index 8a6a5446..b8f7aa26 100644
--- a/packages/mcp-server/src/code-tool-worker.ts
+++ b/packages/mcp-server/src/code-tool-worker.ts
@@ -231,7 +231,8 @@ function makeSdkProxy<T extends object>(obj: T, { path, isBelievedBad = false }:
 
 function parseError(code: string, error: unknown): string | undefined {
   if (!(error instanceof Error)) return;
-  const message = error.name ? `${error.name}: ${error.message}` : error.message;
+  const cause = error.cause instanceof Error ? `: ${error.cause.message}` : '';
+  const message = error.name ? `${error.name}: ${error.message}${cause}` : `${error.message}${cause}`;
   try {
     // Deno uses V8; the first "<anonymous>:LINE:COLUMN" is the top of stack.
     const lineNumber = error.stack?.match(/<anonymous>:([0-9]+):[0-9]+/)?.[1];
diff --git a/packages/mcp-server/src/docs-search-tool.ts b/packages/mcp-server/src/docs-search-tool.ts
index f018e77a..b32ff477 100644
--- a/packages/mcp-server/src/docs-search-tool.ts
+++ b/packages/mcp-server/src/docs-search-tool.ts
@@ -63,7 +63,7 @@ async function searchLocal(args: Record<string, unknown>): Promise<unknown> {
     query,
     language,
     detail,
-    maxResults: 5,
+    maxResults: 10,
   }).results;
 }
 
diff --git a/packages/mcp-server/src/local-docs-search.ts b/packages/mcp-server/src/local-docs-search.ts
index 1b7826f0..75533d00 100644
--- a/packages/mcp-server/src/local-docs-search.ts
+++ b/packages/mcp-server/src/local-docs-search.ts
@@ -2400,7 +2400,7 @@ const EMBEDDED_METHODS: MethodEntry[] = [
     ],
     response: '{ connect_url: string; session_id: string; }',
     markdown:
-      "## new\n\n`client.connect.sessions.new(customer_id: string, customer_name: string, products: string[], customer_email?: string, integration?: { provider: string; auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'; }, manual?: boolean, minutes_to_expire?: number, redirect_uri?: string, sandbox?: 'finch' | 'provider'): { connect_url: string; session_id: string; }`\n\n**post** `/connect/sessions`\n\nCreate a new connect session for an employer\n\n### Parameters\n\n- `customer_id: string`\n  Unique identifier for the customer\n\n- `customer_name: string`\n  Name of the customer\n\n- `products: string[]`\n  The Finch products to request access to\n\n- `customer_email?: string`\n  Email address of the customer\n\n- `integration?: { provider: string; auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'; }`\n  Integration configuration for the connect session\n  - `provider: string`\n    The provider to integrate with\n  - `auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'`\n    The authentication method to use\n\n- `manual?: boolean`\n  Enable manual authentication mode\n\n- `minutes_to_expire?: number`\n  The number of minutes until the session expires (defaults to 129,600, which is 90 days)\n\n- `redirect_uri?: string`\n  The URI to redirect to after the Connect flow is completed\n\n- `sandbox?: 'finch' | 'provider'`\n  Sandbox mode for testing\n\n### Returns\n\n- `{ connect_url: string; session_id: string; }`\n\n  - `connect_url: string`\n  - `session_id: string`\n\n### Example\n\n```typescript\nimport Finch from '@tryfinch/finch-api';\n\nconst client = new Finch();\n\nconst response = await client.connect.sessions.new({\n  customer_id: 'x',\n  customer_name: 'x',\n  products: ['benefits'],\n});\n\nconsole.log(response);\n```",
+      "## new\n\n`client.connect.sessions.new(customer_id: string, customer_name: string, products: string[], customer_email?: string, integration?: { provider: string; auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'; }, manual?: boolean, minutes_to_expire?: number, redirect_uri?: string, sandbox?: 'finch' | 'provider'): { connect_url: string; session_id: string; }`\n\n**post** `/connect/sessions`\n\nCreate a new connect session for an employer\n\n### Parameters\n\n- `customer_id: string`\n  Unique identifier for the customer\n\n- `customer_name: string`\n  Name of the customer\n\n- `products: string[]`\n  The Finch products to request access to. Use `benefits` to access deductions endpoints — `deduction` is a deprecated alias that is still accepted but should not be combined with `benefits`.\n\n- `customer_email?: string`\n  Email address of the customer\n\n- `integration?: { provider: string; auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'; }`\n  Integration configuration for the connect session\n  - `provider: string`\n    The provider to integrate with\n  - `auth_method?: 'assisted' | 'credential' | 'oauth' | 'api_token'`\n    The authentication method to use\n\n- `manual?: boolean`\n  Enable manual authentication mode\n\n- `minutes_to_expire?: number`\n  The number of minutes until the session expires (defaults to 129,600, which is 90 days)\n\n- `redirect_uri?: string`\n  The URI to redirect to after the Connect flow is completed\n\n- `sandbox?: 'finch' | 'provider'`\n  Sandbox mode for testing\n\n### Returns\n\n- `{ connect_url: string; session_id: string; }`\n\n  - `connect_url: string`\n  - `session_id: string`\n\n### Example\n\n```typescript\nimport Finch from '@tryfinch/finch-api';\n\nconst client = new Finch();\n\nconst response = await client.connect.sessions.new({\n  customer_id: 'x',\n  customer_name: 'x',\n  products: ['benefits'],\n});\n\nconsole.log(response);\n```",
     perLanguage: {
       go: {
         method: 'client.Connect.Sessions.New',
@@ -2454,7 +2454,7 @@ const EMBEDDED_METHODS: MethodEntry[] = [
     ],
     response: '{ connect_url: string; session_id: string; }',
     markdown:
-      "## reauthenticate\n\n`client.connect.sessions.reauthenticate(connection_id: string, minutes_to_expire?: number, products?: string[], redirect_uri?: string): { connect_url: string; session_id: string; }`\n\n**post** `/connect/sessions/reauthenticate`\n\nCreate a new Connect session for reauthenticating an existing connection\n\n### Parameters\n\n- `connection_id: string`\n  The ID of the existing connection to reauthenticate\n\n- `minutes_to_expire?: number`\n  The number of minutes until the session expires (defaults to 43,200, which is 30 days)\n\n- `products?: string[]`\n  The products to request access to (optional for reauthentication)\n\n- `redirect_uri?: string`\n  The URI to redirect to after the Connect flow is completed\n\n### Returns\n\n- `{ connect_url: string; session_id: string; }`\n\n  - `connect_url: string`\n  - `session_id: string`\n\n### Example\n\n```typescript\nimport Finch from '@tryfinch/finch-api';\n\nconst client = new Finch();\n\nconst response = await client.connect.sessions.reauthenticate({ connection_id: 'connection_id' });\n\nconsole.log(response);\n```",
+      "## reauthenticate\n\n`client.connect.sessions.reauthenticate(connection_id: string, minutes_to_expire?: number, products?: string[], redirect_uri?: string): { connect_url: string; session_id: string; }`\n\n**post** `/connect/sessions/reauthenticate`\n\nCreate a new Connect session for reauthenticating an existing connection\n\n### Parameters\n\n- `connection_id: string`\n  The ID of the existing connection to reauthenticate\n\n- `minutes_to_expire?: number`\n  The number of minutes until the session expires (defaults to 43,200, which is 30 days)\n\n- `products?: string[]`\n  The products to request access to (optional for reauthentication). Use `benefits` to access deductions endpoints — `deduction` is a deprecated alias that is still accepted but should not be combined with `benefits`.\n\n- `redirect_uri?: string`\n  The URI to redirect to after the Connect flow is completed\n\n### Returns\n\n- `{ connect_url: string; session_id: string; }`\n\n  - `connect_url: string`\n  - `session_id: string`\n\n### Example\n\n```typescript\nimport Finch from '@tryfinch/finch-api';\n\nconst client = new Finch();\n\nconst response = await client.connect.sessions.reauthenticate({ connection_id: 'connection_id' });\n\nconsole.log(response);\n```",
     perLanguage: {
       go: {
         method: 'client.Connect.Sessions.Reauthenticate',
diff --git a/packages/mcp-server/src/server.ts b/packages/mcp-server/src/server.ts
index 6a75b3d4..5f3489ad 100644
--- a/packages/mcp-server/src/server.ts
+++ b/packages/mcp-server/src/server.ts
@@ -29,7 +29,7 @@ export const newMcpServer = async ({
   new McpServer(
     {
       name: 'tryfinch_finch_api_api',
-      version: '9.4.1',
+      version: '9.5.0',
     },
     {
       instructions: await getInstructions({ stainlessApiKey, customInstructionsPath }),
diff --git a/packages/mcp-server/src/util.ts b/packages/mcp-server/src/util.ts
index 40ed5501..069a2b47 100644
--- a/packages/mcp-server/src/util.ts
+++ b/packages/mcp-server/src/util.ts
@@ -2,9 +2,9 @@
 
 export const readEnv = (env: string): string | undefined => {
   if (typeof (globalThis as any).process !== 'undefined') {
-    return (globalThis as any).process.env?.[env]?.trim();
+    return (globalThis as any).process.env?.[env]?.trim() || undefined;
   } else if (typeof (globalThis as any).Deno !== 'undefined') {
-    return (globalThis as any).Deno.env?.get?.(env)?.trim();
+    return (globalThis as any).Deno.env?.get?.(env)?.trim() || undefined;
   }
   return;
 };
diff --git a/src/internal/utils/env.ts b/src/internal/utils/env.ts
index 2d848007..cc5fa0fa 100644
--- a/src/internal/utils/env.ts
+++ b/src/internal/utils/env.ts
@@ -9,10 +9,10 @@
  */
 export const readEnv = (env: string): string | undefined => {
   if (typeof (globalThis as any).process !== 'undefined') {
-    return (globalThis as any).process.env?.[env]?.trim() ?? undefined;
+    return (globalThis as any).process.env?.[env]?.trim() || undefined;
   }
   if (typeof (globalThis as any).Deno !== 'undefined') {
-    return (globalThis as any).Deno.env?.get?.(env)?.trim();
+    return (globalThis as any).Deno.env?.get?.(env)?.trim() || undefined;
   }
   return undefined;
 };
diff --git a/src/resources/connect/sessions.ts b/src/resources/connect/sessions.ts
index 9f8e734b..0132d9de 100644
--- a/src/resources/connect/sessions.ts
+++ b/src/resources/connect/sessions.ts
@@ -63,7 +63,9 @@ export interface SessionNewParams {
   customer_name: string;
 
   /**
-   * The Finch products to request access to
+   * The Finch products to request access to. Use `benefits` to access deductions
+   * endpoints — `deduction` is a deprecated alias that is still accepted but should
+   * not be combined with `benefits`.
    */
   products: Array<
     | 'benefits'
@@ -140,7 +142,9 @@ export interface SessionReauthenticateParams {
   minutes_to_expire?: number;
 
   /**
-   * The products to request access to (optional for reauthentication)
+   * The products to request access to (optional for reauthentication). Use
+   * `benefits` to access deductions endpoints — `deduction` is a deprecated alias
+   * that is still accepted but should not be combined with `benefits`.
    */
   products?: Array<
     | 'benefits'
diff --git a/src/version.ts b/src/version.ts
index 4dd360ac..fde92279 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '9.4.1'; // x-release-please-version
+export const VERSION = '9.5.0'; // x-release-please-version