# Synapse API — Celo NFT by Owner Lookup

> Synapse API — Celo NFT by Owner Lookup 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 2026-10-10).

Retrieves all NFTs owned by a specific wallet address on the Celo blockchain, with pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/celo/nft/by-owner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-celo-nft-by-owner-lookup-f45a0e11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DHqpkD9J23wsaVsifzj7_

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-celo-nft-by-owner-lookup-f45a0e11 -d '<json body>'
```

Example prompt: Can you show me all the NFTs owned by the Celo wallet address 0x1234...abcd, and fetch up to 25 results?

## When to prefer this

Choose this endpoint when you specifically need NFT ownership data on the Celo blockchain. It supports pagination for wallets with large NFT portfolios and is priced at a low per-call rate via x402. Prefer this over generic multi-chain endpoints when the target network is explicitly Celo.

## Known failure modes

- Invalid or malformed owner wallet address returns an error
- Non-existent or empty wallet returns an empty NFT list
- Invalid pageKey causes pagination failure or unexpected results
- Exceeding rate limits or missing x402 payment results in 402 Payment Required
- Network issues with the Celo blockchain may cause timeouts or incomplete 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

A list of NFTs owned by the specified Celo wallet address, including token IDs, contract addresses, and metadata, along with a pagination key for fetching additional results if the total exceeds the requested limit.

## 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-celo-nft-by-owner-lookup-f45a0e11/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)