A contract-first Python framework for modernizing APIs for AI through exact application behavior and explicitly bounded agent-owned decisions.
A synchronous Python API framework with adaptive GIL and free-threaded execution.
Define Python tools once and serve them as a Typer CLI, FastAPI app, or FastMCP server — or convert existing apps between all three
Anthropic, PBC
Visionary sponsor
Bloomberg
Visionary sponsor
Hudson River Trading
Visionary sponsor
Meta
Visionary sponsor
NVIDIA
Visionary sponsor
Microsoft
Sustainability sponsor
Depot
Continuous Integration
AWS
Cloud computing and Security Sponsor
Datadog
Monitoring
Fastly
CDN
Google
Download Analytics
Sentry
Error logging
StatusPage
Status page