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FAQ

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Can I still use the Charge API?

We recommend migrating to the Payment Link API to take advantage of improved reliability and new features.

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What cryptocurrencies are supported?

Payment Link API supports USDC across multiple chains: Ethereum, Base, Polygon, Optimism, and Arbitrum. The payer pays $0 in gas costs across all chains. The Commerce Charge API supported multiple cryptocurrencies through automatic conversion. Payment Link focuses on stablecoins for predictable settlement.

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How do I handle multiple payment options?

Create multiple payment links for different amounts or purposes. Each payment link has a unique URL and ID. Payment links cannot be updated after creation. To change details, deactivate the existing link and create a new one.

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What happens to existing Charge webhooks?

Existing Commerce webhooks will continue to work for Charge API. For Payment Link API, webhook support is available. See the Webhooks documentation to set up real-time payment status notifications.

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How do I monitor payment status?

You can monitor payment status using webhooks for real-time notifications. See the Webhooks documentation for setup instructions. Alternatively, you can periodically poll the GET endpoint to check the payment link status.

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Can customers pay with different cryptocurrencies?

Payment Link API supports USDC on Ethereum, Base, Polygon, Optimism, and Arbitrum. Customers can pay from any of these supported chains with $0 gas costs.

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Support and resources

Payment Link API docs

New API documentation and guides

API reference

Complete endpoint reference

Authentication guide

CDP API key setup and JWT tokens

Developer Discord

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