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Developer Hub

HTTP API Reference

Complete HTTP API reference for Express Relay endpoints, including opportunities, bids, and configuration.

Interactive API Documentation

The complete HTTP API reference is available as an interactive Swagger/OpenAPI documentation:

Production (Mainnet):
https://per-mainnet.dourolabs.app/docs

Staging (Testing):
https://per-staging.dourolabs.app/docs

Base URLs

Use the appropriate base URL for your environment:

SVM Searcher Integration

Learn how to integrate Express Relay as a searcher on Solana Virtual Machine chains to fulfill market orders and limit orders.

WebSocket API Reference

Searchers can connect to the server via WebSocket to reduce latency and subscribe to various events.

On this page

Interactive API Documentation
Base URLs