<div align="center">

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> **"The FastAPI moment for MCP servers."**

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/rainbow.png" width="100%"/>

</div>

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## ⭐ What Is mcp-forge?

**mcp-forge** eliminates MCP server boilerplate entirely. You write a typed Python function. The framework derives the JSON Schema from your type hints, validates inputs at runtime, and exposes the tool over STDIO, HTTP, or SSE — without changing a single line of your logic.

Every MCP server starts the same way: hand-craft JSON Schema, wire a transport loop, handle `notifications/initialized`, redirect stderr, copy-paste validation logic. **mcp-forge does all of that for you.**

```python
from mcp_forge import Forge

app = Forge(name="my-server", version="1.0.0")

@app.tool(description="Search the knowledge base")
async def search(query: str, limit: int = 10) -> list[dict]:
    """Returns ranked results for the given query."""
    ...  # your logic here

if __name__ == "__main__":
    app.run()  # STDIO — Claude Desktop / Cursor / VS Code ready
```

No JSON Schema by hand. No transport boilerplate. No config files.

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## ⚡ Core Doctrine

> These are not features. These are design laws.

| ☔ Principle | 🔧 Implementation |
|---|---|
| **Schema is Derived, Never Written** | Pydantic v2 generates full draft-07 JSON Schema from type hints — automatically |
| **Transport is a Runtime Concern** | STDIO · HTTP · SSE — switch with one flag, tool code never changes |
| **Contrib is Opt-In** | `app.include(memory)` adds tools; you stay in control, zero forced dependencies |
| **Strict by Default** | mypy strict + ruff + 100% typed public API — no surprises in production |
| **Testing Without a Server** | `ForgeTestClient` calls tools directly — no sockets, no mocking, no overhead |
| **Zero Boilerplate** | `@app.tool()` is the entire registration API — one decorator, full MCP compliance |

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 🚀 Quick Start

```bash
# Install
pip install mcp-forge

# Scaffold + run
mcp-forge new my-server && cd my-server
mcp-forge run --reload
```

Connect to **Claude Desktop** in 30 seconds:

```json
{
  "mcpServers": {
    "my-server": {
      "command": "python",
      "args": ["-m", "my_server"]
    }
  }
}
```

Switch to **HTTP** transport with one flag:

```bash
mcp-forge run --transport http --port 8080
```

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## ✨ Features

| Feature | Description |
|---|---|
| 🏗️ **Declarative Tools** | `@app.tool()` — no schema files, no registration calls |
| 🧠 **Auto JSON Schema** | Pydantic v2 under the hood — full draft-07 generated from type hints |
| ✅ **Runtime Validation** | Inputs validated before execution — errors as proper MCP-spec responses |
| 🚀 **Multi-Transport** | STDIO · HTTP · SSE — switch at runtime, logic unchanged |
| ⏳ **Async-First** | `async def` and `def` tools work side by side — no event loop management |
| 🔌 **Contrib Routers** | `memory` · `filesystem` · `web` — one-line include |
| 🧪 **Testing Client** | `ForgeTestClient` — no server, no mocking, no sockets |
| 📦 **PEP 561 Typed** | Ships `py.typed` — full mypy strict + Pyright support |

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 📚 Examples

### Minimal server

```python
from mcp_forge import Forge

app = Forge(name="calculator")

@app.tool()
def add(a: float, b: float) -> float:
    """Add two numbers."""
    return a + b

app.run()
```

### With contrib tools

```python
from mcp_forge import Forge
from mcp_forge.contrib import memory, filesystem, web

app = Forge(name="agent-tools")
app.include(memory)      # remember(), recall(), forget(), list_memory()
app.include(filesystem)  # read_file(), write_file(), list_dir(), delete_file()
app.include(web)         # fetch_url()

app.run()
```

### Unit testing — no server needed

```python
from mcp_forge.testing import ForgeTestClient

client = ForgeTestClient(app)

def test_add():
    result = client.call("add", {"a": 2, "b": 3})
    assert result == 5
```

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 📁 Architecture

```
mcp-forge/
├── core/
│   ├── forge.py        ← Forge class — declarative app entrypoint
│   ├── schema.py       ← Auto JSON Schema from Pydantic v2
│   ├── validator.py    ← Input/output validation engine
│   ├── config.py       ← ForgeConfig dataclass
│   └── exceptions.py   ← MCP-aligned exception hierarchy
├── transports/
│   ├── stdio.py        ← STDIO — MCP spec 2024-11-05 compliant
│   ├── http.py         ← HTTP — FastAPI-based REST transport
│   └── sse.py          ← SSE — Server-Sent Events streaming
├── cli/
│   └── main.py         ← Typer CLI — new, run, validate, build
└── contrib/
    ├── memory.py       ← Scoped in-process memory store
    ├── filesystem.py   ← Safe filesystem tools with path sandboxing
    └── web.py          ← HTTP fetch with timeout and error handling
```

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 📦 Installation

```bash
# Core only (STDIO transport)
pip install mcp-forge

# With HTTP + SSE transports
pip install "mcp-forge[http]"

# Everything
pip install "mcp-forge[all]"
```

**Requires:** Python 3.11+ · pydantic>=2.0

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 🌍 Ecosystem Compatibility

| Client | Transport | Status |
|---|---|---|
| Claude Desktop | STDIO | ✅ Tested |
| Cursor | STDIO | ✅ Tested |
| VS Code (GitHub Copilot) | STDIO · HTTP | ✅ Tested |
| Continue.dev | HTTP · SSE | ✅ Tested |
| Custom LLM agents | HTTP · SSE | ✅ Tested |

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 🤝 Contributing

Contributions are welcome. See [CONTRIBUTING.md](CONTRIBUTING.md) for the full guide.

```bash
git clone https://github.com/benni-os/mcp-forge
cd mcp-forge
pip install -e ".[dev]"
pytest
```

- 🐛 **Found a bug?** → [Open an issue](https://github.com/benni-os/mcp-forge/issues/new?template=bug_report.md)
- 💡 **Have an idea?** → [Start a discussion](https://github.com/benni-os/mcp-forge/discussions)
- 📜 **See what's planned** → [ROADMAP.md](ROADMAP.md)

<br/>

<img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/dark.png" width="100%"/>

## 🌐 Benni OS Ecosystem

| Product | Repo | Role | Status |
|---|---|---|---|
| 🧠 **Benni Master OS** | [benni-os/Benni-Master-OS](https://github.com/benni-os/Benni-Master-OS) | General Brain — sovereign orchestrator | 🟢 Live |
| ⚡ **Benni Gravity** | [benni-os/Benni-gravity-0](https://github.com/benni-os/Benni-gravity-0) | Local operator runtime | 🟢 Ativo |
| 🔌 **Operator Gateway** | [benni-os/benni-operator-gateway](https://github.com/benni-os/benni-operator-gateway) | Open-source MCP HTTP gateway | 🟢 MIT |
| 🐍 **mcp-forge** | [benni-os/mcp-forge](https://github.com/benni-os/mcp-forge) | FastAPI-style Python MCP framework — you are here | 🟢 PyPI |
| ⚡ **benni-nexus** | [benni-os/benni-nexus](https://github.com/benni-os/benni-nexus) | LLM gateway — route, balance, observe | 🟢 npm |
| 🛠️ **Benni Control Plane** | MCP on Railway | NEXUS v5 — persistent memory layer | 🟢 Railway |
| 🤖 **JARVAS-2** | [benni-os/jarvas-2](https://github.com/benni-os/jarvas-2) | Autonomous dispatch + Wave 6 billing | 🔥 Hot |
| 🛍️ **Modo Operador** | [benni-os/modo-operador](https://github.com/benni-os/modo-operador) | Produto BR — R$97 | 🟢 Live |

<br/>

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<div align="center">

**mcp-forge** — *Open-Source Python MCP Framework by [Benni OS](https://github.com/benni-os)*

`ZERO_BOILERPLATE` • `AUTO_SCHEMA` • `MULTI_TRANSPORT` • `STRICT_TYPING` • `MIT_LICENSE`

Built by [Benni Alencar](https://github.com/nsfwbunny) · *If mcp-forge saves you time, give it a ⭐*

</div>