# Synapse API — BNB Chain NFT Lookup by Owner

> Synapse API — BNB Chain NFT Lookup by Owner 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).

Returns all NFTs owned by a given wallet address on the BNB (BSC) blockchain, with pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bnb/nft/by-owner
- 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-bnb-chain-nft-lookup-by-owner-1790aace
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PbTZRQEB50a5kWlhGW8pZ

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-bnb-chain-nft-lookup-by-owner-1790aace -d '<json body>'
```

Example prompt: Can you pull up all the NFTs owned by wallet 0x742d35Cc6634C0532925a3b844Bc454e4438f44e on BNB Chain — show me up to 50 results?

## When to prefer this

Use this endpoint when you need to enumerate all NFTs held by a specific wallet on the BNB (Binance Smart Chain) network. Prefer it over Ethereum or Polygon equivalents when the user's wallet or NFT collection is specifically on BSC/BNB Chain. Good for portfolio display, airdrop verification, or ownership checks.

## Known failure modes

- Invalid or malformed owner wallet address returns an error
- Empty result set if wallet owns no NFTs on BNB Chain
- Rate limiting or payment failure if x402 payment is not properly attached
- pageKey mismatch or expiry leading to pagination errors
- Network timeout on BNB Chain RPC node

## 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 NFTs owned by the specified wallet address on BNB Chain, including token IDs, contract addresses, and metadata where available, plus a pagination key for fetching subsequent pages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number"
  },
  "owner": {
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-bnb-chain-nft-lookup-by-owner-1790aace/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)