diff --git a/.gitignore b/.gitignore
index f13a90d..34a50e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 .env.local
 .env.production.local
 .env.test.local
+.npmrc
 coverage
 dist
 node_modules
diff --git a/bun.lock b/bun.lock
index 1da2184..73143a5 100644
--- a/bun.lock
+++ b/bun.lock
@@ -19,6 +19,20 @@
         "typescript": "5.8.2",
       },
     },
+    "packages/truffle-bunjs": {
+      "name": "@wafflestudio/truffle-bunjs",
+      "version": "0.2.1",
+      "dependencies": {
+        "error-stack-parser": "^2.1.4",
+      },
+      "devDependencies": {
+        "tsup": "8.4.0",
+        "typescript": "5.8.2",
+      },
+      "peerDependencies": {
+        "@types/bun": "^1.2.0",
+      },
+    },
   },
   "packages": {
     "@babel/runtime": ["@babel/runtime@7.27.0", "", { "dependencies": { "regenerator-runtime": "^0.14.0" } }, "sha512-VtPOkrdPHZsKc/clNqyi9WUA8TINkZ4cGk63UUE3u4pmB2k+ZMQRDuIOagv8UVd6j7k0T3+RRIb7beKTebNbcw=="],
@@ -189,12 +203,18 @@
 
     "@rollup/rollup-win32-x64-msvc": ["@rollup/rollup-win32-x64-msvc@4.38.0", "", { "os": "win32", "cpu": "x64" }, "sha512-jjqy3uWlecfB98Psxb5cD6Fny9Fupv9LrDSPTQZUROqjvZmcCqNu4UMl7qqhlUUGpwiAkotj6GYu4SZdcr/nLw=="],
 
+    "@types/bun": ["@types/bun@1.2.8", "", { "dependencies": { "bun-types": "1.2.7" } }, "sha512-t8L1RvJVUghW5V+M/fL3Thbxcs0HwNsXsnTEBEfEVqGteiJToOlZ/fyOEaR1kZsNqnu+3XA4RI/qmnX4w6+S+w=="],
+
     "@types/estree": ["@types/estree@1.0.7", "", {}, "sha512-w28IoSUCJpidD/TGviZwwMJckNESJZXFu7NBZ5YJ4mEUnNraUn9Pm8HSZm/jDF1pDWYKspWE7oVphigUPRakIQ=="],
 
     "@types/node": ["@types/node@12.20.55", "", {}, "sha512-J8xLz7q2OFulZ2cyGTLE1TbbZcjpno7FaN6zdJNrgAdrJ+DZzh/uFR6YrTb4C+nXakvud8Q4+rbhoIWlYQbUFQ=="],
 
+    "@types/ws": ["@types/ws@8.18.1", "", { "dependencies": { "@types/node": "*" } }, "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg=="],
+
     "@wafflestudio/truffle-browser": ["@wafflestudio/truffle-browser@workspace:packages/truffle-browser"],
 
+    "@wafflestudio/truffle-bunjs": ["@wafflestudio/truffle-bunjs@workspace:packages/truffle-bunjs"],
+
     "ansi-colors": ["ansi-colors@4.1.3", "", {}, "sha512-/6w/C21Pm1A7aZitlI5Ni/2J6FFQN8i1Cvz3kHABAAbw93v/NlvKdVOqz7CCWz/3iv/JplRSEEZ83XION15ovw=="],
 
     "ansi-regex": ["ansi-regex@5.0.1", "", {}, "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ=="],
@@ -215,6 +235,8 @@
 
     "braces": ["braces@3.0.3", "", { "dependencies": { "fill-range": "^7.1.1" } }, "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA=="],
 
+    "bun-types": ["bun-types@1.2.7", "", { "dependencies": { "@types/node": "*", "@types/ws": "*" } }, "sha512-P4hHhk7kjF99acXqKvltyuMQ2kf/rzIw3ylEDpCxDS9Xa0X0Yp/gJu/vDCucmWpiur5qJ0lwB2bWzOXa2GlHqA=="],
+
     "bundle-require": ["bundle-require@5.1.0", "", { "dependencies": { "load-tsconfig": "^0.2.3" }, "peerDependencies": { "esbuild": ">=0.18" } }, "sha512-3WrrOuZiyaaZPWiEt4G3+IffISVC9HYlWueJEBWED4ZH4aIAC2PnkdnuRrR94M+w6yGWn4AglWtJtBI8YqvgoA=="],
 
     "cac": ["cac@6.7.14", "", {}, "sha512-b6Ilus+c3RrdDk+JhLKUAQfzzgLEPy6wcXqS7f/xe1EETvsDP6GORG7SFuOs6cID5YkqchW/LXZbX5bc8j7ZcQ=="],
diff --git a/packages/truffle-bunjs/README.md b/packages/truffle-bunjs/README.md
new file mode 100644
index 0000000..2814006
--- /dev/null
+++ b/packages/truffle-bunjs/README.md
@@ -0,0 +1 @@
+# truffle-browser
diff --git a/packages/truffle-bunjs/package.json b/packages/truffle-bunjs/package.json
new file mode 100644
index 0000000..65582b9
--- /dev/null
+++ b/packages/truffle-bunjs/package.json
@@ -0,0 +1,26 @@
+{
+  "name": "@wafflestudio/truffle-bunjs",
+  "version": "0.2.1",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "license": "MIT",
+  "scripts": {
+    "dev": "bun run build -- --watch",
+    "build": "tsup src/index.ts --format cjs --dts"
+  },
+  "files": ["dist/index.js", "dist/index.d.ts"],
+  "keywords": [],
+  "dependencies": {
+    "error-stack-parser": "^2.1.4"
+  },
+  "peerDependencies": {
+    "@types/bun": "*"
+  },
+  "devDependencies": {
+    "tsup": "8.4.0",
+    "typescript": "5.8.2"
+  },
+  "publishConfig": {
+    "access": "public"
+  }
+}
diff --git a/packages/truffle-bunjs/src/index.ts b/packages/truffle-bunjs/src/index.ts
new file mode 100644
index 0000000..a280789
--- /dev/null
+++ b/packages/truffle-bunjs/src/index.ts
@@ -0,0 +1,58 @@
+import ErrorStackParser from 'error-stack-parser';
+import { postEvent } from './postEvent';
+
+export interface TruffleClient {
+  capture(message: Error): void;
+}
+
+export interface TruffleConfig {
+  enabled?: boolean;
+  app: { name: string; phase: string };
+  apiKey: string;
+}
+
+const runtime = { name: 'bunjs', version: Bun.version };
+
+export const getTruffleClient = ({ enabled = true, app, apiKey }: TruffleConfig): TruffleClient => {
+  return {
+    capture: (error: Error) => {
+      try {
+        if (!enabled) return;
+
+        const message = error.message;
+        const description = window.location.href;
+        const fallbackNumber = 99999;
+        const elements = ErrorStackParser.parse(error).map((e) => ({
+          className: '',
+          methodName: e.functionName ?? '',
+          lineNumber: e.lineNumber ?? fallbackNumber,
+          fileName: e.fileName ?? '',
+          isInAppInClude: e.isNative ?? true,
+        }));
+
+        const body = {
+          app,
+          description,
+          exception: { className: error.name, message, elements },
+          runtime,
+          version: 'v1',
+        };
+
+        postEvent(apiKey, body);
+      } catch (err) {
+        const body = {
+          app,
+          description: err && typeof err === 'object' ? (err as { message?: string }).message : '',
+          exception: {
+            className: 'sdk error',
+            message: 'sdk error',
+            elements: [],
+          },
+          runtime,
+          version: 'v1',
+        };
+        postEvent(apiKey, body);
+      }
+    },
+  };
+};
diff --git a/packages/truffle-bunjs/src/postEvent.ts b/packages/truffle-bunjs/src/postEvent.ts
new file mode 100644
index 0000000..0966fd9
--- /dev/null
+++ b/packages/truffle-bunjs/src/postEvent.ts
@@ -0,0 +1,8 @@
+const baseUrl = 'https://truffle-api.wafflestudio.com';
+
+export const postEvent = (apiKey: string, body: unknown) =>
+  fetch(`${baseUrl}/events`, {
+    method: 'POST',
+    headers: { 'x-api-key': apiKey, 'content-type': 'application/json' },
+    body: JSON.stringify(body),
+  });
diff --git a/packages/truffle-bunjs/tsconfig.json b/packages/truffle-bunjs/tsconfig.json
new file mode 100644
index 0000000..37437f6
--- /dev/null
+++ b/packages/truffle-bunjs/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "display": "Default",
+  "compilerOptions": {
+    "target": "ES2022",
+    "composite": false,
+    "declaration": true,
+    "declarationMap": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "inlineSources": false,
+    "isolatedModules": true,
+    "moduleResolution": "node",
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "preserveWatchOutput": true,
+    "skipLibCheck": true,
+    "strict": true
+  },
+  "exclude": ["node_modules"]
+}
diff --git a/packages/truffle-bunjs/vite.config.ts b/packages/truffle-bunjs/vite.config.ts
new file mode 100644
index 0000000..1d81ebc
--- /dev/null
+++ b/packages/truffle-bunjs/vite.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  test: {
+    environment: 'happy-dom',
+  },
+});