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Synapse API — Polygon NFT by Owner
x402
Synapse API — Polygon 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).
Returns a paginated list of NFTs owned by a specified wallet address on the Polygon blockchain
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
A list of NFTs owned by the specified wallet address on the Polygon network, including token metadata (contract address, token ID, name, image, etc.) and a pagination key for fetching subsequent pages.
Example use cases
NFT portfolio audit for a wallet
“Show me all the NFTs held by the Polygon wallet 0xAbC123...def456 — list up to 100 of them so I can see what they own.”
Verify NFT ownership for gating
“Check whether the wallet 0x1234...5678 owns any NFTs on Polygon — I need to verify their holdings for access to our community.”
Paginate through large NFT collection
“I already fetched the first batch of NFTs for wallet 0xDead...Beef on Polygon — can you get the next page using the cursor key 'abc123pageKey' and limit it to 25 results?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/polygon/nft/by-ownerWhen to prefer
Use this endpoint when you need to enumerate all NFTs owned by a specific address on the Polygon (MATIC) network specifically. Prefer this over Ethereum NFT endpoints when the user's wallet activity or NFT collection is on Polygon. Useful for portfolio displays, ownership verification, and NFT gating scenarios on Polygon.
Side effects
- Invalid or malformed wallet address returns a 400 error
- Wallet with no Polygon NFTs returns an empty list
- Invalid pageKey causes a pagination error or empty result
- Rate limiting or payment failure returns a 402 or 429 response
- Polygon network indexer downtime causes 503 or timeout errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | |
| owner | string | |
| pageKey | string |
Tags
x402
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