Superman

🦸‍♂️ Native MCP Server

Built from the ground up to integrate with the Model Context Protocol. Effortlessly expose your application capabilities directly to AI agents.

🧩 Native Observability

Identical patterns for configuration, routing, and logging. Build codebases that AI agents can predict and master instantly.

🤖 Zero-Drifting Documentation

Instantly serves a beautiful Scalar API reference generated directly from your OpenAPI 3.1 spec, ensuring zero manual drift.

📝 Agent-Ready Logging

Six categories of strongly-typed JSON logs out-of-the-box. Perfect for machine-parsing, observability, and anomaly detection.

⚡ High Performance Engine

Powered by the Fastify HTTP engine under the hood, delivering top-tier speed, zero native dependencies, and minimal overhead.

🏗️ Declarative Architecture

Define your entire application structure in a few explicit function calls, allowing AI to parse the architecture in a single pass.

Feature-by-Feature Comparison

Compare how Superman stacks up against traditional Node.js backend frameworks:

Feature / Capability	🦸‍♂️ Superman	🦁 NestJS	🔥 Hono	🦊 Elysia	🔮 Encore	🚀 Fastify	🟢 Express
Native MCP Server	✅	❌	🔌	🔌	❌	🔌	🔌
Native Observability	✅	⚠️	❌	❌	✅	❌	❌
Zero-Drifting Docs	✅	⚠️	🔌	🔌	✅	🔌	❌
Agent-Ready JSON Logs	✅	⚠️	❌	🔌	✅	🔌	❌
High Performance	✅	⚠️	✅	✅	✅	✅	⚠️
Declarative Architecture	✅	⚠️	❌	⚠️	✅	❌	❌

✅ Native / Out-of-the-box support
🔌 Supported via plugin / extension
⚠️ Partial / Complex configuration
❌ No support

Performance Benchmarks

Superman is built on top of the Fastify HTTP engine, inheriting its top-tier throughput and low latency. Here is how it compares in raw JSON requests per second (req/s):

105,000

🦊 Elysia (Bun)0.9 ms

82,300

🔮 Encore1.1 ms

78,450

🚀 Fastify1.2 ms

76,800

🔥 Hono1.25 ms

75,120

🦸‍♂️ Superman1.3 ms

68,900

🦁 NestJS (Fastify)1.45 ms

34,500

🦁 NestJS (Express)2.8 ms

18,900

🟢 Express5.2 ms

Requests / Sec (Avg) · higher is better

Benchmark Setup: c6i.xlarge instance (4 vCPU, 8GB RAM) using autocannon targeting a simple JSON response with 100 concurrent connections.

Built for AI Agents

Superman is forged for the age of autonomous agents — a native MCP server, predictable declarative structure, and agent-ready tooling let AI agents understand and operate your backend with minimal context.

Superman AI Agents

Interactive API Reference

Superman automatically serves a gorgeous, interactive Scalar UI populated directly from your OpenAPI 3.1 schema. Simply enable openapi.docs.enabled: true in your configuration and head to /docs.

Scalar API Reference

SupermanThe Agentic Backend