# Synapse API — NFT Holdings by Owner on ApeChain

> Synapse API — NFT Holdings by Owner on ApeChain 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).

Returns all NFTs owned by a given wallet address on the ApeChain blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/apechain/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-nft-holdings-by-owner-on-apechain-d77a2cae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cep1HQ8rkOYukT-mGCZqg

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-nft-holdings-by-owner-on-apechain-d77a2cae -d '<json body>'
```

Example prompt: Show me all NFTs owned by the wallet 0xAbC1234...5678 on ApeChain, up to 50 results.

## When to prefer this

Use this endpoint when you need to enumerate all NFTs held by a specific wallet address specifically on the ApeChain (APE ecosystem) network. Prefer this over generic multi-chain NFT APIs when you need ApeChain-specific data or are building APE-ecosystem tooling. It supports pagination for large wallets and is priced cheaply at $0.01 per call via x402 micropayments.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Non-existent ApeChain address returns an empty NFT list
- Invalid pageKey causes pagination failure or restarted result set
- Limit value out of acceptable range may cause validation error
- Network or upstream ApeChain node outage returns 5xx error
- Wallet with thousands of NFTs may time out without appropriate pagination

## 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

A list of NFTs owned by the specified wallet address on ApeChain, including token identifiers, contract addresses, and metadata for each NFT, along with a pagination key for fetching subsequent pages of results.

## 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-nft-holdings-by-owner-on-apechain-d77a2cae/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)