payment protocol

Halliday

Halliday Technology

Halliday lets agents express a payment intent (e.g. 'pay 5 USDC to X by Y deadline') and routes settlement across chains automatically, optimizing for fees and finality.

Beta Official site Documentation Updated today
Adoption
Updated 1d ago
Avg payment size
$12
Monthly intents processed
~85K
Protocol details

Protocol details

Settlement latency
Variable by route (sub-second to ~10s for cross-chain)
Payment methods
USDCUSDTCross-chain intents
Company

Halliday Technology Inc.

Country
United States
HQ
San Francisco
Founded
Jun 1, 2022
Structure
private
Key people
  • Griffin Dunaif Co-founder & CEO
Timeline

Timeline

  1. Aug 15, 2023
    Halliday public beta
  2. Dec 10, 2024
    Series A $20M led by a16z
Funding and investors

Funding and investors

Total raised: $26.0M
Investors
a16zAvalanche Foundation
Dec 10, 2024 Series A $20.0M a16z
SDKs and products

SDKs and products

Products
  • Halliday Workflow Engine
  • Halliday Pay
  • Halliday Cross-Chain Router
SDK languages
TypeScriptSolidity
Stablecoins and chains

Stablecoins and chains

Stablecoins
usdt usdc
Chains
ethereum base polygon arbitrum
Notable users

Notable users

Integrations
  • Wormhole
  • LayerZero
  • Avalanche subnets
Security and audits

Security and audits

Risk notes

Risk notes

  • ● Cross-chain bridge risk on multi-hop routes
  • ● Smaller distribution vs Coinbase-backed competitors
Competitors

Competitors

Coinbase Agent PaymentsSkyfireLI.FI
Resources

Resources

Notes

More on agent payments in the AI payments deep dive and the use case.