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This guide is for market maker teams integrating a quoting service with Longshot. Market makers connect over WebSocket, receive RFQ broadcasts, and submit signed quote payloads. User order creation and settlement orchestration happen through Longshot; market makers only need to maintain connectivity, price RFQs within the deadline, and handle quote outcomes. Market makers must be whitelisted by a Longshot admin using their Longshot user ID before they can authenticate as a market maker.

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Get Your User ID

Use wallet auth with the EVM wallet you plan to run as a market maker. The response includes the user_id Longshot needs for whitelisting. 
POST https://api.longshot.xyz/v1/auth/wallet
Content-Type: application/json

{
  "address": "0x742d35cC6634C0532925A3B844Bc9e7595F8B2A1",
  "message": "Sign in to longshot.xyz\n\nAddress: 0x742d35cC6634C0532925A3B844Bc9e7595F8B2A1\nTimestamp: 1735430000000",
  "signature": "base64-encoded-ecdsa-signature"
}

{
  "session_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "address": "0x742d35cC6634C0532925A3B844Bc9e7595F8B2A1",
  "user_id": "8d3f6b4a-a79a-4b4d-8e38-64c2d8f7b9a1",
  "expires_at": 1735516400
}
To request whitelisting, DM @helmass on Telegram with your Longshot user ID.

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Integration Surfaces

WebSocket API

Receive RFQs, submit signed quotes, and handle terminal quote results notifications.

HTTP API

Read strategy inputs, balances, and funding state over HTTP.

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Start Here

Overview

Connection model, prerequisites, and environment URLs.