intpot 0.2.2

Universal converter between CLI (Typer), MCP (FastMCP), and API (FastAPI) interfaces

IntPot

Universal converter between CLI (Typer), MCP (FastMCP), and API (FastAPI) interfaces.

intpot bridges three popular Python frameworks:

• Typer — CLI applications
• FastMCP — Model Context Protocol servers
• FastAPI — REST API applications

Given a source file written in any of these frameworks, intpot detects the framework, inspects its functions/tools/endpoints, and generates equivalent code in the target framework.

Features

• 6 conversion directions — CLI to MCP, CLI to API, MCP to CLI, MCP to API, API to CLI, API to MCP
• Python API — intpot.load() accepts file paths or live app instances for programmatic conversion
• Directory auto-discovery — scan an entire directory and convert all found apps at once
• Auto-detection — automatically identifies the source framework by analyzing imports and patterns
• HTTP method preservation — API routes keep their GET/POST/PUT/DELETE methods through conversion
• Project scaffolding — intpot init creates new CLI, MCP, or API projects from templates
• Jinja2 templates — clean, readable generated code with proper type hints
• Fully typed — PEP 561 compatible with py.typed marker
• Zero config — just point at a Python file and specify the target

Installation

pip install intpot            # core (CLI conversions only)
pip install intpot[mcp]       # + FastMCP support
pip install intpot[api]       # + FastAPI support
pip install intpot[all]       # everything

Quick Start

Scaffold a new project

intpot init my-server --type mcp
intpot init my-app --type cli
intpot init my-api --type api

Convert between frameworks

# MCP server -> Typer CLI
intpot to cli server.py

# CLI app -> FastMCP server
intpot to mcp app.py

# CLI app -> FastAPI app
intpot to api app.py

# Write output to a file
intpot to cli server.py --output cli_app.py

# Convert all apps in a directory
intpot to cli ./myproject/
intpot to mcp ./myproject/ --output ./converted/

Python API

Use intpot programmatically from Python:

import intpot

# From a file
app = intpot.load("mcp_server.py")
cli_code = app.to_cli()
api_code = app.to_api()

# From a live instance
from fastmcp import FastMCP

mcp = FastMCP("my-server")

@mcp.tool()
def greet(name: str) -> str:
    return f"Hello, {name}!"

app = intpot.load(mcp)
print(app.to_cli())

# Write directly to a file
app.write("output/cli_app.py", "cli")
app.write("output/api_app.py", "api")

The load() function accepts file paths (str or Path) and live app instances (FastMCP, Typer, FastAPI). The returned IntpotApp object provides:

• .to_cli(), .to_mcp(), .to_api() — return generated code as strings
• .write(path, target) — generate and write to a file in one step (target is "cli", "mcp", "api", or a SourceType enum)
• .tools — list of normalized ToolInfo objects describing all detected functions
• .source_type — detected framework type (SourceType.CLI, SourceType.MCP, or SourceType.API)

Architecture

intpot uses a four-stage pipeline:

                    +-----------+
                    |  SOURCE   |
                    | (.py file)|
                    +-----+-----+
                          |
                    1. DETECT
                    (identify framework)
                          |
                    +-----v-----+
                    | SourceType|
                    | cli/mcp/api|
                    +-----+-----+
                          |
                    2. INSPECT
                    (extract functions)
                          |
                    +-----v-----+
                    | ToolInfo[] |
                    | (normalized|
                    |  schema)  |
                    +-----+-----+
                          |
                    3. GENERATE
                    (render template)
                          |
                    +-----v-----+
                    |  OUTPUT   |
                    | (.py code)|
                    +-----------+

1. DETECT — core/detector.py imports the source file and identifies whether it's a Typer app, FastMCP server, or FastAPI app
2. INSPECT — Framework-specific inspectors (core/inspectors/) extract function signatures, parameters, types, defaults, and docstrings into a normalized ToolInfo schema
3. GENERATE — Framework-specific generators (core/generators/) render the normalized schema into target code using Jinja2 templates

Examples

MCP server to CLI app

Input (mcp_server.py):

from fastmcp import FastMCP

mcp = FastMCP("example-server")

@mcp.tool()
def greet(name: str, greeting: str = "Hello") -> str:
    """Greet someone by name."""
    return f"{greeting}, {name}!"

Command: intpot to cli mcp_server.py

Output:

import typer

app = typer.Typer()

@app.command()
def greet(
    name: str = typer.Argument(..., help=""),
    greeting: str = typer.Option('Hello', help=""),
) -> None:
    """Greet someone by name."""
    # TODO: implement
    typer.echo("greet called")

CLI app to FastAPI

Input (cli_app.py):

import typer

app = typer.Typer()

@app.command()
def add(
    a: int = typer.Argument(..., help="First number"),
    b: int = typer.Argument(..., help="Second number"),
) -> None:
    """Add two numbers together."""
    typer.echo(a + b)

Command: intpot to api cli_app.py

Output:

from fastapi import FastAPI
from pydantic import BaseModel, Field

app = FastAPI()

class AddRequest(BaseModel):
    a: int = Field(..., description="First number")
    b: int = Field(..., description="Second number")

@app.post("/add")
def add(request: AddRequest) -> dict:
    """Add two numbers together."""
    # TODO: implement
    return {"result": "add called"}

API app to MCP server

Input (api_app.py):

from fastapi import FastAPI

app = FastAPI()

@app.post("/greet")
def greet(name: str, greeting: str = "Hello") -> dict:
    """Greet someone by name."""
    return {"message": f"{greeting}, {name}!"}

Command: intpot to mcp api_app.py

Output:

from fastmcp import FastMCP

mcp = FastMCP("generated-server")

@mcp.tool()
def greet(
    name: str,
    greeting: str = 'Hello',
) -> dict:
    """Greet someone by name."""
    # TODO: implement
    return "greet called"

See the examples/ directory for all 6 conversion outputs.

CLI Reference

intpot init

Scaffold a new project from a template.

intpot init <name> --type <mcp|cli|api>

Argument/Option	Description
name	Project name (creates a directory)
--type, -t	Project type: mcp, cli, or api (required)

intpot to cli

Convert an MCP or API source file to a Typer CLI app.

intpot to cli <source> [--output <path>]

intpot to mcp

Convert a CLI or API source file to a FastMCP server.

intpot to mcp <source> [--output <path>]

intpot to api

Convert a CLI or MCP source file to a FastAPI app.

intpot to api <source> [--output <path>]

Argument/Option	Description
source	Path to a source Python file or directory
--output, -o	Output file path (prints to stdout if omitted)

Development

Requires uv.

git clone https://github.com/tugrulguner/intpot.git
cd intpot
uv sync --all-extras
uv run pre-commit install

Run the full check suite:

make check   # lint + typecheck + test

Individual targets:

make lint        # ruff check + format check
make typecheck   # pyright
make test        # pytest
make format      # auto-format code

See CONTRIBUTING.md for more details.

License

MIT