Introduction

LI.FI Perps API overview, authentication, and request format

The LI.FI Perps API provides REST endpoints for perpetual futures trading across multiple providers.

Base URLs

Environment	URL
Development	https://develop.li.quest/v1/perps

Authentication

All requests require an API key. Register at the LI.FI Partner Portal to get your API key and integrator name.

Pass the following headers with every request:

x-lifi-api-key: your-api-key
x-lifi-integrator: your-app-name

Header	Required	Description
x-lifi-api-key	Yes	API key provided by LI.FI (enforced at infrastructure level)
x-lifi-integrator	No	Your integrator identifier for tracking and analytics

In the SDK, pass these as configuration options:

import { createPerpsClient } from '@lifi/perps-sdk';

const client = createPerpsClient({
  integrator: 'your-app-name',
  apiKey: 'your-api-key',
});

Never expose your x-lifi-api-key in client-side code (browser JavaScript, frontend bundles). The key is visible in browser developer tools and network tabs. For frontend integrations, proxy API calls through your backend to keep the key secret.

Request Format

• All POST request bodies use application/json
• Query parameters are used for GET requests
• String numeric values (prices, sizes, amounts) avoid floating-point precision issues

Response Format

Successful responses return JSON with appropriate HTTP status codes:

Status	Meaning
200	Success — response body contains requested data
201	Created — resource created and ready for next step
202	Accepted — operation submitted for asynchronous processing

Response Headers

All responses include the x-lifi-requestid header for request correlation and debugging:

x-lifi-requestid: req_abc123xyz789

Include the x-lifi-requestid value when reporting issues to LI.FI support. This ID is logged server-side and allows us to trace your specific request.

Error Format

All errors follow the same structure with numeric error codes (2000+ range):

{
  "code": 2002,
  "tool": "hyperliquid",
  "message": "Invalid request parameters"
}

Field	Type	Description
code	integer	Numeric error code (see Error Codes)
tool	string	The DEX that generated the error
message	string	Human-readable error description

HTTP Error Status Codes

Status	Description
400	Validation error — invalid parameters
401	Authentication error — invalid signature
403	Forbidden — agent not authorized
404	Not found — market, order, or resource does not exist
408	Timeout — request or upstream operation timed out
409	Conflict — nonce already used
410	Gone — nonce expired, retry the operation
422	Unprocessable — insufficient margin or balance
424	Failed dependency — upstream DEX error

Rate Limits

Rate limits are applied per API key. Contact LI.FI support for rate limit details and higher tier access.

Endpoints Overview

Market Data (Public)

Method	Path	Description
GET	/providers	List providers
GET	/markets	List all markets (optional symbol filter)
GET	/prices	Get all mid prices
GET	/ohlcv/{symbol}	Get OHLCV chart data
GET	/orderbook/{symbol}	Get orderbook snapshot

Account

Method	Path	Description
GET	/account	Get account summary
GET	/fills	Get order fills
GET	/activity	Get account activity
GET	/order/{id}	Get order details

Actions

Method	Path	Description
POST	/createAction	Build action payloads for signing
POST	/executeAction	Submit signed action payloads