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Welcome to the Halliday Payments documentation. Developers can explore our guides and examples to integrate a seamless crypto deposit flow in minutes.

API Keys

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Hello World

Create your first app with the Payments SDK in minutes

Developer Workshop

See firsthand how to get started with the Halliday Payments SDK widget

API Quickstart

Learn how to implement Halliday Payments with the API directly

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About Halliday Payments

With Halliday Payments, users can acquire any token on any chain with minimal effort. Seamlessly onramp from fiat, cross arbitrary bridges, and swap assets from an existing wallet (e.g. MetaMask), into whatever form. Connect with an exchange account (e.g. Coinbase) to transfer digital assets onto any chain. Halliday Payments works in a fully self-custodial manner. Users can connect with any wallet to manage their funds. And, they remain in complete control, not Halliday. Gain access to a unified integration that offers:
  • Fiat on and off ramps
  • Seamless cross-chain swaps
  • Exchange payments direct to any network
An all-in-one payments solution that just works — purpose built for all chains, production ready on day one.

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Contact

To get in touch regarding integration of Halliday into an existing product, contact the team on X @HallidayHQ or reach out to the business development team. Developers can join the conversation in the Halliday community Discord server. The Halliday team and community members can help with technical questions for those implementing payment automation.

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Use Cases

Examples of Web3 teams using Halliday Payments for the following use cases can be found on the Ecosystem page.

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Fiat Onramp to All Chains

Users can onramp from fiat to a specific token on any chain with a streamlined experience. Fund an address using credit card or centralized exchange within a whitelabeled popup or embedded modal. A headless SDK is also available to developers.

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Cross-Chain Swaps

Halliday simplifies cross-chain token swaps for both developers and their end users. By design, the system finds the optimal route, from an input token on one chain, to an output token on another. No need to sign multiple transactions. One user interaction and Halliday handles the heavy lifting.

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Automated Workflows

Protocols can compose interactions across networks, like a purchase, a swap, a stake, and more with one interaction. Halliday handles cross-chain operations, retries, gas payments, asset balances, transaction formation, batch scheduling, and network routing all with a single click or tap.

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Which Tokens & Chains Does Halliday Payments Support?

Halliday can support any token on any chain, including routes through specific bridges or decentralized exchanges based on the needs of a use case. To support more onramps, tokens, chains, bridges, or DEXs, get in touch with the Halliday team today.