Last Updated: 3/9/2026

API Reference - Additional Topics

Note: This section is under construction. Full API reference documentation will be added soon.

This page serves as a placeholder for additional API reference documentation that will be added to complete the reference section.

Reference Documentation To Be Added

The following API reference guides are planned:

Core APIs

• Context API - Complete reference for the Context object (c)
• Request API - HonoRequest object methods and properties
• Routing API - Advanced routing patterns and methods
• Presets - Router presets (hono, hono/quick, hono/tiny)

Helper APIs

• Cookie Helpers - Cookie parsing and setting
• SSG Helpers - Static site generation utilities
• Streaming Helpers - Server-sent events and streaming responses
• HTML Helpers - HTML templating without JSX
• Factory Helpers - Creating handlers and middleware
• Testing Helpers - Type-safe testing utilities

Current Reference Documentation

The following reference docs are already available:

• Hono App API - Core Hono class methods
• Exception Handling - HTTPException usage

Comprehensive Coverage in Other Sections

Many API details are covered in depth in these sections:

Key Concepts

• Routing - Path parameters, wildcards, regex
• Context and Handlers - Context methods, request/response handling
• Middleware - Middleware patterns and lifecycle
• Routers - Router types and performance

Guides

• Validation - Request validation with Zod and others
• JSX Templating - JSX/TSX for HTML rendering
• RPC Client - Type-safe client generation
• Testing Applications - Testing patterns

Quick API Overview

While we complete the full reference documentation, here’s a quick overview:

Context Object (c)

// Request
c.req.param('id')           // Path parameters
c.req.query('page')         // Query parameters
c.req.header('Authorization') // Headers
c.req.json()                // Parse JSON body
c.req.formData()            // Parse form data
 
// Response
c.text('Hello')             // Text response
c.json({ data })            // JSON response
c.html(<div>Hello</div>)    // HTML response
c.redirect('/path')         // Redirect
c.status(201)               // Set status
c.header('X-Custom', 'value') // Set header
 
// Variables
c.set('user', user)         // Set variable
c.get('user')               // Get variable
 
// Environment
c.env.DATABASE_URL          // Access bindings
c.env.MY_KV                 // KV namespace

Hono App

// Routing
app.get('/path', handler)
app.post('/path', handler)
app.put('/path', handler)
app.delete('/path', handler)
app.all('/path', handler)
app.on('METHOD', '/path', handler)
 
// Middleware
app.use('*', middleware)
app.use('/api/*', middleware)
 
// Composition
app.route('/api', apiApp)
app.basePath('/v1')
app.mount('/other', otherFramework)
 
// Error Handling
app.notFound(handler)
app.onError(errorHandler)
 
// Testing
app.request('/path')
app.request(req)

Community Resources

• Hono API Documentation  - Official docs
• TypeScript Definitions  - Source type definitions
• Hono Examples  - Code examples

What’s Next

• Hono App API - Core application methods
• Exception Handling - Error handling
• Key Concepts - Detailed concept guides