# Synapse API — Mantle NFT by Owner

> Synapse API — Mantle 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 2026-09-15).

Retrieves all NFTs owned by a specific wallet address on the Mantle blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/mantle/nft/by-owner
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-mantle-nft-by-owner-1d16f172
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WND7E5TgEbNQtgmq5yN-C

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-mantle-nft-by-owner-1d16f172 -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you specifically need to enumerate NFTs owned by a wallet address on the Mantle blockchain. Prefer this over generic NFT APIs if your use case targets Mantle specifically. It is ideal for portfolio display, NFT-gating, ownership verification, and paginated browsing of large NFT collections on Mantle.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Wallet with no NFTs on Mantle returns an empty list
- Invalid pageKey causes pagination failure or unexpected results
- Rate limiting or payment failure (x402) blocks the request
- Mantle network RPC unavailability causes timeout or error

## 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 Mantle network, including token identifiers, metadata, and contract information, along with a pagination key for fetching additional results if the collection is large.

## 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-mantle-nft-by-owner-1d16f172/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)