# Synapse API — Ink NFT Sales Lookup

> Synapse API — Ink NFT Sales Lookup 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 events on the Ink blockchain network for a given contract address, optionally filtered by block range and sorted in ascending or descending order.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/ink/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-ink-nft-sales-lookup-7513f5fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qDomWY_9vkrM5wqfjdyLE

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-ink-nft-sales-lookup-7513f5fe -d '<json body>'
```

Example prompt: Fetch me the last 25 NFT sales for contract 0xAbC123... on the Ink blockchain, sorted newest first.

## When to prefer this

Use this endpoint when you specifically need NFT sales data from the Ink blockchain network and can filter by block range or contract address. Prefer this over generic blockchain explorers when you need structured, paginated sales event data via a simple pay-per-call API without managing your own node infrastructure.

## Known failure modes

- Invalid or non-existent contract address returns empty results or an error
- fromBlock greater than toBlock causes a validation error or empty result set
- Exceeding allowed limit values may result in truncated or error responses
- Network or upstream blockchain node unavailability causes timeout or 5xx errors
- Missing required contractAddress field returns a 400 bad 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

Returns a list of NFT sale events for the specified contract on the Ink network, each including sale details such as transaction identifiers, block numbers, and sale metadata. Results are paginated by the limit parameter and ordered as specified.

## 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-ink-nft-sales-lookup-7513f5fe/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)