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The Halliday API provides direct HTTP access to payment services including onramps, swaps, exchange withdrawals, and offramps. It offers complete control over the payment experience through a flexible, API-first integration. There are two primary ways to integrate Halliday’s payment services: The Halliday API is ideal for developers who need:
  • Full control over the user interface and experience
  • Custom payment flows tailored to specific use cases

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Key Features

  • RESTful Design: Standard HTTP methods and status codes
  • API-First Architecture: No SDK dependencies required
  • Comprehensive Payment Support: Onramps, swaps, offramps, and exchange balances
  • Real-time Status Tracking: Monitor payments throughout their lifecycle
  • Flexible Integration: Works with any programming language or framework

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Getting Started

To begin using the Halliday API:
  1. Obtain API Credentials: Get your API key from Halliday
  2. Explore the API: Review the API Quickstart guide
  3. Test in Sandbox: Use the Sandbox Testing environment during development
  4. Go Live: Switch to production when ready

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API Endpoints

The Halliday API provides endpoints for:
  • Asset Discovery: Find supported assets and payment routes
  • Quote Generation: Get real-time pricing and optimal routing for payments
  • Payment Confirmation: Confirm and initiate payments
  • Status Tracking: Monitor payment progress
  • Fund Management: Handle deposits and withdrawals

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Authentication

All API requests require authentication via API key: 
Authorization: Bearer pk_your-api-key-here
For detailed implementation examples, see the API Quickstart guide.

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Method Docs and Playground

After getting an API key, check out the Haliday Payments REST API endpoint method documentation tab. This can also be found in the API Reference tab at the top of each page.