Works on Workers

SQLite client for Turso and libSQL. Use with D1: createClient({ url: process.env.DATABASE_URL })

import { createClient } from '@libsql/client';

// Usage:
// Test client creation and API surface
const client = createClient({ url: 'libsql://fake-host.turso.io' });
return { success: typeof client.execute === 'function' && typeof client.batch === 'function', result: 'libSQL client created' };

Serverless Postgres driver for Neon. Works on Workers with HTTP connection pooling.

import { neon } from '@neondatabase/serverless';

// Usage:
const sql = neon('postgresql://user:pass@host/db');
return { success: typeof sql === 'function', result: 'Neon client created' };

Serverless MySQL driver for PlanetScale. Works on Workers with HTTP connection.

import { connect } from '@planetscale/database';

// Usage:
const conn = connect({ url: 'mysql://user:pass@host/db' });
return { success: typeof conn.execute === 'function', result: 'PlanetScale client created' };

TypeScript ORM with SQL-like syntax

import { sql } from 'drizzle-orm';

// Usage:
const query = sql`SELECT * FROM users WHERE id = ${123}`;
return { success: query.queryChunks.length > 0, result: 'SQL query built' };

DEPRECATED package (no longer maintained since 2020). Official legacy Elasticsearch JavaScript client for connecting to Elasticsearch servers via HTTP REST API. Replaced by @elastic/elasticsearch (the new official client). The old client is no longer maintained and users are strongly advised to migrate to the new client. While theoretically an HTTP REST client could work in Workers, this legacy package is unmaintained and has compatibility issues. Original error 'Cannot read properties of undefined (reading 'bold')' occurred due to outdated dependencies and lack of maintenance.

💡 Alternative: @elastic/elasticsearch (new official client) - may work with Workers, needs testing

Redis client for Node.js. Use Cloudflare Workers KV for key-value storage or @upstash/redis for Redis over HTTP.

💡 Alternative: @upstash/redis

SQL query builder - use D1 or Hyperdrive

💡 Alternative: @cloudflare/d1

Error: Command failed: npm install npm warn deprecated rollup-plugin-inject@3.0.2: This package has been deprecated and is no longer maintained. Please use @rollup/plugin-inject. npm warn deprecated sourcema

Type-safe SQL query builder - use with D1 database

import { Kysely, sql } from 'kysely';

// Usage:
return { success: typeof Kysely === 'function' && typeof sql === 'function', result: 'Kysely exports available' };

LevelDB database abstraction

💡 Alternative: @cloudflare/d1, @upstash/redis

Error: Package level needs manual test configuration - do not use generic Object.keys() test

LevelDB backend

💡 Alternative: @cloudflare/d1, @upstash/redis

Error: Package leveldown needs manual test configuration - do not use generic Object.keys() test

LevelDB wrapper

💡 Alternative: @cloudflare/d1, @upstash/redis

Error: Package levelup needs manual test configuration - do not use generic Object.keys() test

JSON database - works with custom adapters

import { Low } from 'lowdb';

// Usage:
const db = new Low({ read: async () => ({ posts: [] }), write: async () => {} }, { posts: [] });
await db.read();
return { success: Array.isArray(db.data.posts), result: db.data };

MongoDB driver - use D1 or @upstash/redis instead

💡 Alternative: @cloudflare/d1, @upstash/redis

Error: Maximum call stack size exceeded

MongoDB ORM - use D1 with Drizzle ORM instead

💡 Alternative: @cloudflare/d1, drizzle-orm

Error: Maximum call stack size exceeded

Microsoft SQL Server driver - use D1 instead

💡 Alternative: @cloudflare/d1

Error: Package mssql needs manual test configuration - do not use generic Object.keys() test

MySQL client requires TCP sockets

💡 Alternative: D1 (SQLite on Cloudflare), @planetscale/database (HTTP-based MySQL)

In-memory/file-based database

💡 Alternative: D1 (SQLite), @upstash/redis, KV

PostgreSQL client for Node.js. Use @neondatabase/serverless or Hyperdrive for Workers

import pkg from 'pg';

// Usage:
const { Client } = pkg;
const client = new Client({ connectionString: 'postgresql://test' });
return { success: typeof client.connect === 'function', result: { hasClient: true } };

Official Redis client for Node.js. Works with TCP connections in Workers. Consider @upstash/redis for HTTP-based Redis.

💡 Alternative: @upstash/redis

Error: Unexpected token ':'

import { createClient } from 'redis';

const client = createClient({ url: 'redis://your-redis-server:6379' });
await client.connect();
await client.set('key', 'value');
const value = await client.get('key');
return { success: true, value };

Node.js ORM - use D1 with @cloudflare/d1 instead

💡 Alternative: @cloudflare/d1

Native C++ module - use D1 or @libsql/client instead

💡 Alternative: D1/@libsql/client