# Synapse API — Gnosis NFT Sales

> Synapse API — Gnosis 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 2026-09-14).

Retrieves NFT sale events on the Gnosis blockchain, filterable by contract address and block range

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/gnosis/nft/sales
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-gnosis-nft-sales-03e3bdd6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CTsamogqo-YoQNUmoOSuO

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-gnosis-nft-sales-03e3bdd6 -d '<json body>'
```

Example prompt: Pull the last 50 NFT sales on Gnosis for contract address 0xabc123... starting from block 30000000 to block 30500000, ordered from newest to oldest.

## When to prefer this

Use this endpoint when you need on-chain NFT sale data specifically from the Gnosis (xDai) network and want to filter by contract address or block range. Prefer this over general blockchain explorers when you need programmatic, pay-per-call access to paginated sale events without managing your own Gnosis RPC node.

## Known failure modes

- Invalid contract address format returns validation error
- Block range too large may cause timeout or truncated results
- fromBlock greater than toBlock returns empty or error response
- Network or RPC node unavailability causes 5xx errors
- Payment failure (x402) blocks the request before processing

## 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 from the Gnosis blockchain, each containing details such as transaction hash, block number, buyer/seller addresses, token ID, and sale price, filtered according to the provided contract address and block range 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-gnosis-nft-sales-03e3bdd6/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)