# Synapse API — Sonic NFT Sales

> Synapse API — Sonic 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 2026-09-15).

Retrieves NFT sales transaction data on the Sonic blockchain within a specified block range and optional contract filter

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/sonic/nft/sales
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-sonic-nft-sales-baee4d4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lFbkYaMjnSJzNpWeySRO_

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-sonic-nft-sales-baee4d4d -d '<json body>'
```

Example prompt: Pull the last 50 NFT sales on the Sonic blockchain for contract address 0xAbC123... sorted in descending order from block 1000000 to 1050000.

## When to prefer this

Use this endpoint when you specifically need NFT sales data from the Sonic blockchain network, want block-range filtering for precise historical queries, and need pay-per-call pricing without a subscription commitment.

## Known failure modes

- Invalid or non-existent contractAddress returns empty results or error
- fromBlock greater than toBlock results in invalid range error
- Payment failure via x402 returns 402 status blocking the response
- Limit exceeding maximum allowed returns truncated or error response
- Non-Sonic chain contract address returns no results

## 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 Sonic blockchain, including transaction details, filtered by the specified contract address, block range, record limit, and sort order.

## 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-sonic-nft-sales-baee4d4d/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)