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Synapse API — Sei NFT Metadata Lookup
x402
Synapse API — Sei 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 2026-09-15).
Fetches NFT metadata for a given token ID and contract address on the Sei 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 NFT metadata for the specified token on the Sei blockchain, typically including the token name, description, image URL, and a list of attributes/traits associated with that NFT.
Example use cases
NFT portfolio attribute inspector
“I want to see the full metadata and traits for token ID 7 from the Sei NFT contract at 0xDEADBEEF123456 — name, description, image, everything.”
NFT marketplace listing enrichment
“Fetch the metadata for token ID 100 at Sei contract address sei1qp9z3x7... so I can display the image and attributes on our marketplace listing page.”
NFT rarity and trait analysis
“What are the on-chain attributes and traits for token ID 555 from the Sei NFT collection at contract address 0xF00BA4 — I need to check if it has the rare background trait.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/sei/nft/metadataWhen to prefer
Use this endpoint when you specifically need NFT metadata from the Sei blockchain and want a simple pay-per-call model without managing your own Sei RPC node. Prefer this over generic blockchain RPC calls when you want a normalized metadata response without raw on-chain decoding.
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
- Sei network connectivity issues cause timeouts
- Malformed input (non-string token ID or address) causes validation errors
- Payment failure via x402 blocks the request entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tokenId | string | |
| contractAddress | string |
Tags
x402
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