Cloudflare Workers API toolkit

App builder

createApp wires request ids, CORS, request logging, health checks and your middleware in the right order, then registers versioned chanfana modules.

Consistent responses

One JSON envelope for success, pagination and errors, with typed c.respond* helpers and matching OpenAPI schemas.

Production-safe errors

ApiError factories, masked 5xx messages in production, redaction, reporters and root-cause logging that never throttles server errors.

Structured logging

pino tuned for the Workers runtime: request-scoped loggers bound to the request id, header and query redaction, and configurable request logs.

KV caching

Memoize reads in Workers KV with stable hashed keys, TTLs, typed revival and invalidation that stays within the per-invocation operation budget.

Multi-tenant Drizzle D1

Tenant-scoped select, count, insert, upsert, update and delete helpers that always apply the tenant filter, plus per-tenant cache namespaces.

A typed, documented API in a few lines

src/index.ts
import {createApp, defineModule} from '@ltv/cwb';
import {fromHono, OpenAPIRoute} from 'chanfana';
import type {Context} from 'hono';

class Hello extends OpenAPIRoute {
  handle(c: Context) {
    return c.respond({message: 'Hello from Workers'});
  }
}

export default createApp({
  modules: [defineModule({version: 1, routes: {'GET /hello': Hello}})],
  openApi: (app) => fromHono(app, {docs_url: '/docs'}),
});