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Synapse API — Optimism NFT Lookup by Owner
x402
Synapse API — Optimism 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).
Retrieves all NFTs owned by a given wallet address on the Optimism blockchain network.
Price / call$0.01
Success—
StatusUnknown
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 NFT assets owned by the specified wallet on Optimism, including token metadata such as contract address, token ID, name, image, and collection details. Supports pagination via a page key for wallets with large holdings.
Example use cases
NFT portfolio audit for a wallet
“Can you pull up all the NFTs held by the Optimism wallet 0xDEADBEEF...1234? I want to see everything in that portfolio, up to 50 items.”
Paginating through a large NFT collection
“I already fetched the first page of NFTs for Optimism address 0xABCD...5678 — can you get me the next page using the page key 'abc123xyz'?”
Verifying NFT ownership before gating access
“Does the Optimism wallet 0x9876...CAFE hold any NFTs? Check and list what it owns so I can verify if they qualify for our token-gated community.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/optimism/nft/by-ownerWhen to prefer
Use this endpoint when you specifically need to enumerate NFTs held by a wallet on the Optimism L2 network. Prefer this over generic Ethereum NFT lookups when the user is working within the Optimism ecosystem. Ideal for portfolio viewers, NFT-gated access checks, and wallet analytics on Optimism.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Unsupported address format (non-EVM) causes a bad request
- Expired or invalid pageKey causes pagination failure
- Rate limiting or payment failure (x402) blocks the request
- Empty result set if the wallet holds no NFTs on Optimism
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | |
| owner | string | |
| pageKey | string |
Tags
x402
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