# Synapse API — Berachain NFT by Owner

> Synapse API — Berachain 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 2026-10-31).

Fetches all NFTs owned by a given wallet address on the Berachain network, with pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/berachain/nft/by-owner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-berachain-nft-by-owner-43918631
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__NG9QWZWDhyP0QsPW1hpZ

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-berachain-nft-by-owner-43918631 -d '<json body>'
```

Example prompt: Show me all the NFTs owned by the Berachain wallet 0xAbC123...def456 — fetch up to 20 at a time.

## When to prefer this

Use this endpoint when you specifically need NFT ownership data on the Berachain network. It is optimized for Berachain and supports pagination via pageKey for large portfolios, making it suitable for wallets with many NFTs. Prefer this over generic multi-chain NFT APIs when Berachain is the target chain.

## Known failure modes

- Invalid or malformed owner address returns an error or empty result
- Non-existent or zero-activity wallet returns an empty NFT list
- Invalid pageKey causes pagination failure or unexpected results
- Rate limiting or payment failure (x402) blocks the request
- Berachain RPC downtime causes timeout or service unavailability

## 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 paginated list of NFTs owned by the specified wallet on Berachain, including token IDs, contract addresses, metadata, and a pageKey for fetching subsequent pages if more results exist.

## 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-berachain-nft-by-owner-43918631/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)