Introduction

⏱️ 2 min read

🎬 Video Tutorial

Prefer learning by watching? Check out our integration walkthrough:

Watch the integration walkthrough on YouTube

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Generate your API Key

First generate API Key:

1. Register -> https://api.defindex.io/register

2. Login -> https://api.defindex.io/login

3. Create api_key and refresh

For more details, refer to the DeFindex API documentation.

Postman collection json here

This guide will walk you through integrating DeFindex into your app using the provided API. We'll use TypeScript for the examples, but the concepts apply to any language.

🚀 TypeScript SDK Available!

If you're developing in TypeScript, we highly recommend using our official SDK instead of direct API integration. The SDK provides:

• Type safety and comprehensive TypeScript definitions

• Simplified authentication with API keys

• Built-in error handling and validation

• Complete coverage of all API endpoints

• Working examples and detailed documentation

Check out the DeFindex TypeScript SDK documentation for the easiest integration experience.

For non-TypeScript projects or custom integrations, continue with this direct API guide below.

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Complete reference: API Reference

Prerequisites

• Basic knowledge of TypeScript or JavaScript

• Node.js environment

• Stellar SDK installed (npm install stellar-sdk)

• DeFindex API key (contact PaltaLabs team for access)

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1. Setting Up the API Client

First, create an ApiClient class to handle authentication and API requests.

import StellarSdk from 'stellar-sdk';

class ApiClient {
    private readonly apiUrl = "api.defindex.io";
    private readonly apiKey: string;

    constructor(apiKey: string) {
        this.apiKey = apiKey;
    }

    // Helper for POST requests
    async postData(endpoint: string, vaultAddress: string, params: Record<string, any>): Promise<any> {
        const response = await fetch(`https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${this.apiKey}`
            },
            body: JSON.stringify(params)
        });
        return await response.json();
    }

    // Helper for GET requests
    async getData(endpoint: string, vaultAddress: string, params?: Record<string, any>): Promise<any> {
        const url = params
            ? `https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}?${new URLSearchParams(params).toString()}`
            : `https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}`;

        const response = await fetch(url, {
            method: 'GET',
            headers: {
                'Authorization': `Bearer ${this.apiKey}`
            }
        });
        return await response.json();
    }
}

Go to interact with vault, see the implementations of the functions:

• Deposit

• Withdraw

• Balance

• APY

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Request Parameters Reference

Deposit Request

{
    amounts: [10000000],     // Array of amounts for each vault asset (7 decimals for XLM)
    caller: userAddress,     // User's wallet address
}

Withdraw Request

{
    amounts: [5000000],      // Array of amounts to withdraw from each asset
    caller: userAddress,     // User's wallet address
}

Send Request

{
    xdr: signedXdr,         // Signed transaction XDR
    launchtube: false       // Set true for gasless transactions
}