bun.sh/docs/runtime/bun-apis.md

Bun implements a set of native APIs on the Bun global object and through a number of built-in modules. These APIs represent the canonical "Bun-native" way to perform some common development tasks. They are all heavily optimized for performance. Click the link in the left column to view the associated documentation.

{% table %}

• Topic
• APIs

---

• HTTP
• Bun.serve

---

• File I/O
• Bun.file Bun.write

---

• Processes
• Bun.spawn Bun.spawnSync

---

• TCP
• Bun.listen Bun.connect

---

• Transpiler
• Bun.Transpiler

---

• Routing
• Bun.FileSystemRouter

---

• HTMLRewriter
• HTMLRewriter

---

• Utils
• Bun.peek Bun.which

---

• SQLite
• bun:sqlite

---

• FFI
• bun:ffi

---

• Testing
• bun:test

---

• Node-API
• Node-API

---

{% /table %}