# Synapse API — Soneium NFT Sales

> Synapse API — Soneium 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 2026-11-03).

Retrieves NFT sales transaction history on the Soneium blockchain, filtered by block range, contract address, and sort order.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/soneium/nft/sales?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-soneium-nft-sales-8e5d8761
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6iB8G69xTfz9wYaKm4jrF

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-soneium-nft-sales-8e5d8761 -d '<json body>'
```

Example prompt: Pull me the last 50 NFT sales on Soneium for contract 0xAbC123... sorted by most recent first, from block 1000000 to 2000000.

## When to prefer this

Use this endpoint when you specifically need NFT sales data from the Soneium blockchain and want to filter by block range or contract address. Prefer this over generic NFT APIs when Soneium-specific data is required, or when you need pay-per-call pricing without a subscription.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- fromBlock greater than toBlock causes an invalid range error
- Requesting a block range with no sales returns an empty array
- Network or RPC issues with Soneium may cause timeouts
- Unsupported order enum value returns a validation error
- Payment failure via x402 protocol blocks the request

## 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

A list of NFT sale events on the Soneium blockchain, each containing details such as sale price, buyer/seller addresses, token IDs, block numbers, and transaction hashes, filtered and ordered according to the provided parameters.

## 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-soneium-nft-sales-8e5d8761/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)