Test on staging networks. Without staging-network pain.
Circle's sandbox mirrors production exactly — same APIs, same SDKs, same webhooks — but with test USDC and instant faucet access.
Build against production — without the consequences.
The sandbox is a complete, isolated copy of Circle's production environment. The same APIs, SDKs, and webhooks behave identically, so what you build against the sandbox works in production without surprises.
Fund any supported chain with test USDC and native gas in a single click, reset your state whenever you want, and develop with no waitlist and no contract.
- Mirrors production APIs, SDKs, and webhooks exactly
- One-click test USDC and gas faucet
- Reset state on-demand without losing keys
Mirror prod
Identical surface area, including reserves and attestations metadata.
Instant faucet
Test USDC + native gas in 1 click for any supported chain.
Reset on-demand
Wipe your sandbox state without losing API keys.
No commitments
Free, no waitlist, no contract.
Questions worth asking.
Build with Circle.
Start in the sandbox, ship to production in days. Or talk to our team about a deeper partnership.