# Synapse API — Ronin NFT by Owner

> Synapse API — Ronin 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 Ronin blockchain, with pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/ronin/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-ronin-nft-by-owner-b7d24ae1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dWuzLANZ60BPG_vIHBQND

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-ronin-nft-by-owner-b7d24ae1 -d '<json body>'
```

Example prompt: Can you pull up all the NFTs owned by Ronin wallet address 0xABC123... and show me up to 50 at a time?

## When to prefer this

Choose this endpoint when you specifically need to enumerate NFTs on the Ronin blockchain (used by Axie Infinity and Sky Mavis games) for a given wallet address. It supports pagination via pageKey and limit, making it suitable for wallets with large NFT holdings. Prefer this over generic NFT APIs when Ronin-specific data is required and you are operating in a pay-per-call model via x402.

## Known failure modes

- Invalid or malformed owner address returns an error or empty result
- Non-existent wallet address returns an empty NFT list
- Missing required 'owner' field causes a validation error
- Expired or invalid pageKey may return an error or reset pagination
- Rate limiting or payment failure results in 402 response
- Ronin network downtime or RPC issues cause timeout or 5xx 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 paginated list of NFTs owned by the specified Ronin wallet address, including token metadata such as token IDs, contract addresses, and associated NFT details, along with a pageKey for retrieving 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-ronin-nft-by-owner-b7d24ae1/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)