# Synapse API — opBNB NFT by Owner

> Synapse API — opBNB NFT 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 2026-09-13).

Fetches all NFTs owned by a given wallet address on the opBNB blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/opbnb/nft/by-owner
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-opbnb-nft-by-owner-914a3a66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CYuH4rSdBWZxMAWKHhP9H

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-opbnb-nft-by-owner-914a3a66 -d '<json body>'
```

Example prompt: Can you fetch all the NFTs owned by wallet address 0x1234...abcd on the opBNB network, showing up to 20 results?

## When to prefer this

Use this endpoint when you specifically need to enumerate NFT holdings on the opBNB (BNB Layer 2) network for a given wallet. Prefer this over generic NFT APIs when opBNB chain data is required and pay-per-call micro-payment via x402 is acceptable. Good for one-off lookups or agent workflows that need programmatic NFT ownership checks without a subscription.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- opBNB node unavailability causes timeout or 5xx error
- Invalid pageKey causes pagination failure or unexpected results
- Missing required 'owner' field returns a validation error
- Rate limiting or payment failure via x402 may block the call

## 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 NFTs owned by the specified wallet address on the opBNB chain, including token identifiers, contract addresses, and metadata. Supports pagination via a pageKey for wallets with large NFT holdings.

## 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-opbnb-nft-by-owner-914a3a66/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)