# Synapse API — Mantle NFT Sales

> Synapse API — Mantle 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 2026-10-19).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/mantle/nft/sales?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-mantle-nft-sales-8472dac0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rkg6i1ESDq8fvb9asHU4v

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-mantle-nft-sales-8472dac0 -d '<json body>'
```

Example prompt: Pull the last 50 NFT sales for contract 0xAbCd1234... on the Mantle blockchain, ordered from newest to oldest.

## When to prefer this

Use this endpoint when you need paginated, filterable NFT sales data specifically from the Mantle blockchain. It is ideal when you need to scope queries to a specific smart contract address and/or a block range, and when you want control over result ordering and volume. Prefer this over generic blockchain explorers when you need programmatic, pay-per-call access without rate-limit subscriptions.

## Known failure modes

- Invalid contract address format returns a validation error
- fromBlock greater than toBlock returns an empty result or error
- Limit value too large may result in timeout or truncated response
- Non-existent contract address returns empty sales array
- Network congestion or Mantle RPC issues may cause delayed or failed responses

## 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 records from the Mantle blockchain matching the specified filters, including details such as transaction identifiers, buyer/seller addresses, sale prices, token IDs, and block numbers. Results are ordered by the specified sort direction and capped at the requested 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-mantle-nft-sales-8472dac0/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)