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Welcome to Krown Marketplace API

The Krown NFT Marketplace API provides programmatic access to all NFT data on the Sonic blockchain. Built for developers, our API is completely free and open with no API keys required for read operations.

Quickstart

Get started with your first API call in minutes

API Reference

Explore all available endpoints

Collections

Browse NFT collections and metadata

Real-time Activities

Track sales, transfers, and marketplace events

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Features

No API keys, generous rate limits, no signup required. Just start building.
All data is indexed directly from the Sonic blockchain with sub-second latency.
Complete NFT metadata including traits, rarity scores, images, and ownership history.
Simple, predictable REST API with JSON responses. Easy to integrate with any tech stack.

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Base URL

All API requests should be made to: 
https://api.krownlabs.app/api

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Response Format

All responses are returned in JSON format: 
{
  "data": [...],
  "pagination": {
    "page": 1,
    "limit": 50,
    "total": 1000,
    "totalPages": 20
  }
}

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