APIGen

Turn any API into Python code. No docs needed.

# Generate from any API
$ apigen generate https://api.github.com

# Use it immediately
>>> from generated_tools.api_github_com import ApiGithubCom
>>> client = ApiGithubCom(api_key="ghp_...")
>>> user = client.list_user()
>>> print(user['login'])
'your-username'

What it does

Point APIGen at any API URL. Get working Python code with methods, auth, and type hints.

Works with:

• APIs that have OpenAPI specs
• APIs that don't have any docs
• Public and authenticated APIs

Install

pip install apigen-ai

Quick start

# Public API
apigen generate https://jsonplaceholder.typicode.com

# Authenticated API
apigen generate https://api.github.com

Generated code goes in generated_tools/.

Example: GitHub API

apigen generate https://api.github.com

Creates generated_tools/api.github.com.py with:

class ApiGithubCom:
    def __init__(self, api_key=None):
        self.base_url = "https://api.github.com"
        self.api_key = api_key

    def list_user(self) -> Dict:
        """Get authenticated user"""
        ...

    def list_users(self, page=None, limit=None) -> Dict:
        """List all users"""
        ...

    def get_users(self, id) -> Dict:
        """Get specific user"""
        ...

Use it:

import importlib.util

spec = importlib.util.spec_from_file_location(
    "api", "generated_tools/api.github.com.py"
)
api = importlib.util.module_from_spec(spec)
spec.loader.exec_module(api)

client = api.ApiGithubCom(api_key="ghp_your_token")
user = client.list_user()
print(f"Logged in as: {user['login']}")

How it works

Phase 1: Check for OpenAPI spec

• Probes /openapi.json, /swagger.json, etc.
• Parses endpoints, parameters, auth
• Generates full method signatures

Phase 2: Probe the API

• Tests common patterns (/users, /api/v1, /products)
• Detects auth from response headers
• Infers parameters from responses
• Discovers ID-based endpoints

Result: Clean Python code that works.

Commands

# Generate tool
apigen generate <url>

# Skip Elasticsearch (faster)
apigen generate <url> --skip-index

# Search catalog (requires Elasticsearch)
apigen search "payment apis"

# Setup Elasticsearch
apigen setup

Configuration

Optional .env file:

ELASTICSEARCH_HOST=localhost
ELASTICSEARCH_PORT=9200
ELASTICSEARCH_USER=elastic
ELASTICSEARCH_PASSWORD=changeme

Requirements

• Python 3.11+
• Elasticsearch 8.15+ (optional, for search)
• Docker (optional, for Elasticsearch)

What gets generated

Every tool includes:

• Method signatures with parameters
• Authentication (Bearer, API key, OAuth)
• Type hints
• Docstrings
• Error handling
• Query parameter support

Limitations

• Review generated code before production
• Complex auth may need manual tweaks
• No rate limiting
• No WebSocket/GraphQL support yet

Contributing

Issues and PRs welcome.

Areas for improvement:

• More auth methods
• Better parameter inference
• GraphQL support
• WebSocket support

License

MIT