# Synapse API — Linea NFT Lookup by Owner

> Synapse API — Linea NFT Lookup 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).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/linea/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-linea-nft-lookup-by-owner-9456a714
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5UUBAliXLNtUiWhF78jXg

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-linea-nft-lookup-by-owner-9456a714 -d '<json body>'
```

Example prompt: Look up all the NFTs owned by wallet address 0xAbC123...DEF on the Linea blockchain and return up to 20 results.

## When to prefer this

Use this endpoint when you specifically need NFT ownership data on the Linea blockchain. It supports pagination for wallets with large collections and is priced per-call via x402 micropayments, making it suitable for on-demand lookups rather than bulk batch processing. Prefer this over generic blockchain explorers when you need structured, programmatic NFT data for Linea specifically.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Non-existent address returns an empty NFT list
- Invalid pageKey causes pagination failure or error
- Network or upstream Linea RPC issues cause timeouts
- Missing required 'owner' field results in a validation error
- Rate limiting or payment failure (x402) blocks the call

## 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 the Linea network, including token identifiers and associated metadata, with pagination support via a pageKey for retrieving subsequent result 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-linea-nft-lookup-by-owner-9456a714/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)