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Synapse API — Gnosis NFT Metadata Lookup
x402
Synapse API — Gnosis NFT Metadata 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 2026-09-14).
Fetches on-chain NFT metadata for a given contract address and token ID on the Gnosis 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 the on-chain metadata for the specified NFT on Gnosis, typically including the token name, description, image URL, external URL, and an array of trait/attribute key-value pairs as stored in the token's metadata URI.
Example use cases
NFT portfolio enrichment on Gnosis
“I have a list of Gnosis NFT contract addresses and token IDs in my portfolio — can you fetch the metadata for token 7 from contract 0xDEF456... on Gnosis so I can see its name, image URL, and traits?”
NFT marketplace listing verification
“Before listing this NFT, can you verify its on-chain metadata on Gnosis? The contract is 0x789ABC... and the token ID is 101 — I need to confirm the description and attributes are correct.”
NFT rarity and trait research
“I'm researching an NFT project on Gnosis — can you fetch the metadata for token ID 250 from contract 0x111222... so I can see what traits it has and compare rarity?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/gnosis/nft/metadataWhen to prefer
Choose this endpoint when you specifically need NFT metadata from the Gnosis (xDAI) blockchain network. It is purpose-built for Gnosis and handles Gnosis-specific RPC and indexing. Prefer it over generic multi-chain explorers when you need fast, pay-per-call access without API key registration, or when building agents that operate across the 57+ chains supported by the Synapse API suite including Gnosis.
Side effects
- Invalid or non-existent contract address returns an error or empty response
- Token ID not found within the contract returns a not-found error
- Contract is not an NFT (ERC-721/ERC-1155) contract, causing a metadata resolution failure
- Gnosis RPC node unavailability leads to timeout
- Metadata URI is off-chain and unreachable (e.g., IPFS gateway down), resulting in incomplete metadata
- Malformed contractAddress or tokenId input causes a 400-level validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tokenId | string | |
| contractAddress | string |
Tags
x402
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