The library

Every simulator, in one place.

9 runnable sims today, each measured against the real service — and the shelf keeps filling. Missing one you need? Request a simulator.

Payments

Charges, refunds, disputes, subscriptions — with the state to back them.

Stripe

PayPal

Shopify

Repos, issues, pull requests, and webhooks that actually fire.

GitHub

Containers, caches, and databases your agent can push real state into.

Docker

Redis

PostgreSQL

Model and inference APIs, mirrored so you can test without burning tokens.

Hugging Face

Anthropic