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Synapse API — Linea NFT Metadata Lookup
x402
Synapse API — Linea 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 Linea 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 on-chain NFT metadata for the specified token on the Linea network, typically including the token name, description, image URL, and an array of trait/attribute key-value pairs as defined in the NFT's metadata standard.
Example use cases
NFT Trait Verification Before Purchase
“I'm about to buy token ID 42 from the contract 0x1234abcd...5678 on Linea — can you pull its metadata and tell me what traits and rarity attributes it has?”
NFT Gallery Portfolio Display
“I need the metadata for all my NFTs on Linea — start with token ID 7 from contract 0xdeadbeef...1234 so I can display the image and description in my gallery app.”
NFT Collection Analytics Research
“Can you fetch the metadata for token ID 999 from Linea contract 0xfeed1234...abcd? I want to check the attributes to compare it against the rest of the collection.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/linea/nft/metadataWhen to prefer
Use this endpoint when you specifically need NFT metadata on the Linea blockchain network and want a pay-per-call model without subscription overhead. Prefer this over generic NFT APIs when Linea network coverage is required, and over general-purpose blockchain explorers when you need structured, machine-readable metadata rather than a human-facing UI.
Side effects
- Invalid or non-existent contract address returns an error or empty response
- Token ID not found on the specified contract returns a not-found error
- Contract address is not an NFT contract (e.g., ERC-20) and has no token metadata
- Linea network RPC unavailability causes timeout or service error
- Malformed input (non-hex contract address or non-numeric token ID) returns a validation error
- Payment failure via x402 results in 402 response before data is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tokenId | string | |
| contractAddress | string |
Tags
x402
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