Documentation Introduction Getting Started Comparison Examples

Core Concepts Procedures Middleware Typed Errors

Protocols MessagePack devalue WebSocket

Plugins CORS OpenTelemetry Pino Logging Rate Limiting Body Limit Strict GET Cookies Compression Signing & Encryption Smart Coercion Server Batch Publisher/PubSub Custom Serializers File Upload

Integrations Fastify H3 Nitro Hono Express Elysia Next.js SvelteKit Remix Astro SolidStart AWS Lambda NestJS Message Port Peer-to-Peer OpenAPI Client tRPC Interop React Server Actions TanStack Query AI SDK

Best Practices Testing & Mocking Monorepo Setup SSR Optimization

Advanced Building Custom Plugins

Migrating from tRPC

Advanced

Advanced

Deep dives into Katman internals and advanced patterns.

Go beyond the basics.

Building Custom Plugins

Create reusable guards, wraps, and hooks — package and share them.

SSR Optimization

Prevent refetch waterfalls with server-side prefetching.

Building Custom Plugins

Create reusable guards, wraps, and hooks.