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Documentation Index

Fetch the complete documentation index at: https://docs.halliday.xyz/llms.txt

Use this file to discover all available pages before exploring further.

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

API Keys

Get your free API keys now in the Halliday Dashboard

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 email [email protected]. Get a free API key at dashboard.halliday.xyz.

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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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Unified Deposit Experience

For modern apps like prediction markets, Perp DEXes, and NeoBanks, depositing digital or fiat currencies can add a tremendous amount of scope and maintenance overhead. Halliday’s unified deposit experience brings deposits with a native look and feel to any app with just a few lines of code.

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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. Headless API-based integrations can be implemented as well.

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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 the onchain orchestration occurs automatically.

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Automated Workflows

Protocols can compose interactions across networks, like a purchase, a swap, a stake, and more with a single user 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. [email protected]