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Synapse API — Ethereum NFT by Owner
x402
Synapse API — Ethereum 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 2026-09-14).
Returns all NFTs owned by a given Ethereum wallet address, with optional pagination
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 paginated list of NFTs owned by the specified Ethereum address, including token IDs, contract addresses, and NFT metadata. Also returns a pageKey for fetching subsequent pages of results.
Example use cases
NFT portfolio audit for a wallet
“Show me all the NFTs held by Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to see everything they own, up to 50 results.”
Verify NFT ownership before gating access
“Check if wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B owns any NFTs on Ethereum — I need to verify their holdings before granting access to my platform.”
Build NFT gallery for a user profile
“Fetch the first 25 NFTs owned by 0x1234567890abcdef1234567890abcdef12345678 so I can display them on their profile page, and give me a page key so I can load more if needed.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/ethereum/nft/by-ownerWhen to prefer
Use this endpoint when you need to enumerate all NFTs held by a specific Ethereum wallet address. Ideal for building NFT galleries, verifying ownership, auditing portfolios, or gating access based on token holdings. Prefer this over general blockchain explorers when you need structured, machine-readable NFT data with pagination support for large wallets.
Side effects
- Invalid or malformed Ethereum address returns an error
- Non-existent wallet with no NFTs returns an empty list
- pageKey from a previous session may be expired or invalid
- Rate limiting or payment failure returns a 402 or 429 error
- Network timeouts if the Ethereum indexer is slow
- Very large wallets may require many paginated calls
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | |
| owner | string | |
| pageKey | string |
Tags
x402
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