# Synapse API — NFTs by Owner

> Synapse API — NFTs 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 specified wallet address, with pagination support

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bob/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-nfts-by-owner-7694ca48
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LUSZX_OV7WT0rH30M0vGh

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-nfts-by-owner-7694ca48 -d '<json body>'
```

Example prompt: Show me all the NFTs owned by wallet address 0xAbC123...def456, returning up to 50 results.

## When to prefer this

Choose this endpoint when you need to enumerate all NFTs held by a specific wallet address on the Bob network, especially when you require pagination for large portfolios. It is pay-per-call via x402, making it suitable for on-demand agent queries without subscription overhead.

## Known failure modes

- Invalid or malformed owner address returns an error
- No NFTs found returns an empty list
- Invalid pageKey causes pagination failure
- Exceeding rate limits may result in 429 errors
- Network or RPC node unavailability causes 500 errors

## 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, including token identifiers, collection addresses, and metadata, along with a pagination key for fetching subsequent pages if the owner holds more NFTs than the requested limit.

## 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-nfts-by-owner-7694ca48/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)