hono-validation

Validate Hono API request inputs with Zod, TypeBox, or Valibot.

Updated Feb 7, 2026

Search Tags:#typescript #validation #middleware #zod #hono #valibot #typebox

Ready to run

npx skills add https://github.com/olavocarvalho/engrain --skill hono-validation-olavocarvalho

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: hono-validation
Source: https://github.com/olavocarvalho/engrain/tree/main/.agents/skills/hono-validation
Command: npx skills add https://github.com/olavocarvalho/engrain --skill hono-validation-olavocarvalho

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill provides a structured approach to validating API inputs in Hono, ensuring type-safe access to validated data and reducing runtime errors.

Core Features & Use Cases

Built-in validator integration with Zod, TypeBox, and Valibot.
Multi-target validation for JSON bodies, forms, query parameters, headers, cookies, and route parameters.
Type-safe data access in handlers and flexible error handling to surface validation failures.
Use Case: Validate a POST /users payload against a strict schema before processing and persisting data.

Quick Start

Install the validator packages and apply zValidator or tbValidator to a route to enforce validation.

Frequently Asked Questions about hono-validation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I validate API request inputs in Hono?▼

To validate API request inputs in Hono, apply built-in validators like zValidator or tbValidator to enforce schema checks across JSON bodies, query parameters, and headers before processing data.

Does Hono validation support both Zod and Valibot for type-safe data?▼

Yes, Hono validation supports both Zod and Valibot, alongside TypeBox, allowing you to apply schema inference and deliver strongly typed request data directly within your route handlers.

How do I validate query parameters and JSON bodies in Hono routes?▼

You validate query parameters and JSON bodies in Hono routes by applying multi-target validators to enforce strict schemas, ensuring type-safe data access and enabling flexible error handling for failures.

Can I use custom error handling for validation failures in Hono?▼

Yes, you can implement custom error handling for validation failures in Hono by configuring the validator middleware to surface specific errors when JSON bodies or headers fail schema checks.

What is the best way to ensure type-safe data access in Hono handlers?▼

The best way to ensure type-safe data access in Hono handlers is using schema inference with Zod, TypeBox, or Valibot to validate inputs and guarantee strongly typed request data.

Do I need to install separate validator packages to use Zod with Hono?▼

Yes, you need to install the specific validator packages like Zod, TypeBox, or Valibot to apply their respective validators to Hono routes and enforce type-safe API validation.