Halliday primary-source snapshot
Fetched: 2026-04-22 UTC
1) Official homepage
Source: https://halliday.xyz/
Selected excerpts from the official site:
Unified crypto payments.
Grow your revenue and meet your users wherever they are. Available globally.
Halliday integrates top bridges and DEXs, instantly adding new pathways to your token.
Set up a deposit UI with 7 lines of code or own your deposit experience with a flexible API.
Fully non-custodial by design. Halliday never takes custody of user funds.
2) Official docs
Source: https://docs.halliday.xyz/
Selected excerpts from the docs/home page:
With Halliday Payments, users can acquire any token on any chain with minimal effort.
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.
Additional signals from the docs index and API quickstart:
- REST API plus widget/SDK integration paths
- API key authentication via dashboard.halliday.xyz
- Payment quotes, confirmation, status, wallet balances, and recovery/withdrawal endpoints
- One-time-wallet / deposit-address model for each payment
3) Payment-flow docs
Source: https://docs.halliday.xyz/pages/payment-flows
Selected excerpts from the payment-flow page:
Halliday makes this easy by integrating global on and offramp providers and utilizing a noncustodial cross-chain workflow protocol.
Single and cross-chain swaps are core features of Halliday Payments, enabled by the workflow protocol.
In some instances, an onramp or swap can fail, in which case the developer can provide options for their user to proceed.
Useful implementation notes captured in the docs:
- Halliday expects developers to validate routes, request quotes, confirm a selected quote, then poll payment status
- Payments above certain thresholds may trigger user verification steps before proceeding
- Failed or expired flows can be retried or withdrawn back to the owner wallet
4) Ecosystem and company blog
Sources:
- https://halliday.xyz/ecosystem
- https://blog.halliday.xyz/halliday-raises-20m-series-a-led-by-a16z-crypto-to-ensure-developers-never-write-a-smart-contract-again/
Selected excerpts from the ecosystem page and official blog:
We work with dozens of blockchain teams across verticals and industries.
Halliday Payments is used by over 35 clients and leverages workflows built on the protocol.
Since 2023, we’ve been battle-testing our technology with a proprietary version of our workflow engine, powering production flows for major partners, including DeFi Kingdoms, Core Wallet by Ava Labs, ApeChain, and more.
The Workflow Protocol solves these problems. It enables developers to automate any workflow without writing a smart contract.
Notes
- This pass did not locate a classic whitepaper or litepaper from official Halliday sources.
- The strongest primary materials in this pass were the homepage, docs portal, payment-flow/API docs, ecosystem page, and official company blog.
- The compliance/security docs page currently appears sparse and says fuller details are still coming soon.