# Synapse API — Ronin NFT Sales

> Synapse API — Ronin NFT Sales is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Fetches NFT sales transaction history on the Ronin blockchain, filterable by contract address and block range.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/ronin/nft/sales?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-ronin-nft-sales-a7221965
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xBz4tEWQn85MrlQ9kKorz

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synapse-api-ronin-nft-sales-a7221965 -d '<json body>'
```

Example prompt: Pull the last 50 NFT sales on Ronin for contract address 0x32950db2a7164ae833121501c797d79e7b79d74c, sorted descending, from block 40000000 to 41000000.

## When to prefer this

Use this endpoint when you specifically need NFT sales data from the Ronin blockchain (used by Axie Infinity, Sky Mavis games). Prefer it over generic NFT APIs when Ronin-native data is required and you need block-level filtering with ascending/descending sort control.

## Known failure modes

- Invalid contract address format returns an error
- fromBlock greater than toBlock returns empty or error
- Exceeding limit bounds may return truncated results or an error
- Block range too wide may time out or return partial data
- Payment failure (x402) blocks the request before execution

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns a list of NFT sale events on the Ronin blockchain matching the query parameters, including transaction details, block numbers, and contract-level sale data within the specified block range and limit.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number"
  },
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string"
  },
  "toBlock": {
   "type": "number"
  },
  "fromBlock": {
   "type": "number"
  },
  "contractAddress": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-ronin-nft-sales-a7221965/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)