# Synapse API — Monad NFT by Owner

> Synapse API — Monad 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 2026-10-13).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/monad/nft/by-owner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-monad-nft-by-owner-7b6f8c9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E5RrS0iCxmSgH6kXs_P9C

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-monad-nft-by-owner-7b6f8c9b -d '<json body>'
```

Example prompt: Show me all the NFTs owned by the Monad wallet address 0xAbC123... — return up to 50 results.

## When to prefer this

Use this endpoint when you need to enumerate all NFTs held by a specific wallet address on the Monad blockchain specifically. Prefer it over generic NFT APIs when the target chain is Monad, and when you need paginated, owner-scoped queries rather than collection-scoped or token-scoped lookups.

## Known failure modes

- Invalid or malformed owner wallet address returns an error or empty result
- Expired or invalid pageKey causes pagination to fail or restart
- Limit value out of acceptable range may cause a validation error
- Payment failure via x402 protocol prevents the call from executing
- Monad network downtime or indexer lag may cause incomplete or stale NFT data

## 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 on the Monad network, including token metadata and ownership details, along with a pagination key for fetching additional 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-monad-nft-by-owner-7b6f8c9b/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)