Stablecoin Liquidity API

Checker provides a unified API infrastructure that gives fintechs, FX banks, payment service providers, neobanks, exchanges, custodians, and stablecoin issuers a single integration point to execute stablecoin-fiat conversions across 50+ liquidity providers and 200+ currencies worldwide.

Product Overview

When a PSP, neobank, or FX bank connects to Checker's API, Checker serves as their fiat on/off-ramp infrastructure — handling the full conversion pipeline from order placement through settlement without the client needing to manage individual provider relationships or integration complexity. Clients send a single API request to create a conversion order and receive a clean, standardized response regardless of the underlying liquidity provider that executed the trade.

Key Features

• Single Integration: Connect once to the global stablecoin-fiat liquidity network — no individual provider integrations required
• 50+ Providers: Access banks, OTC desks, exchanges, custodians, PSPs, and stablecoin issuers through one interface
• 200+ Currencies: Broad fiat and digital asset coverage for cross-border operations
• Best-Execution Routing: Automated provider selection optimized by price, speed, and reliability on every order
• RFQ Workflows: Full Request for Quote support including creation, acceptance, and rejection
• Real-time Order Tracking: Order status monitoring and position management via API or dashboard
• Communication Integrations: Native Telegram, WhatsApp, and Slack integration for trading team workflows
• HMAC Security: API signing with required nonce, path, and API-key headers plus full audit trails

Use Cases

Checker is purpose-built for fintechs and financial institutions that need to scale internationally without the overhead of managing dozens of individual liquidity provider integrations. Clients include FX banks, payment service providers, neobanks, and digital asset businesses seeking fast, reliable stablecoin-fiat conversion at global scale.