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Synapse API — Token Metadata Lookup
x402
Synapse API — Token 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).
Retrieves on-chain token metadata (name, symbol, decimals, supply, etc.) for a given smart contract address across 57+ blockchain networks.
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 structured token metadata for the given contract address, including fields such as token name, ticker symbol, number of decimals, total supply, and potentially additional on-chain attributes. Response is scoped to the specific contract queried.
Example use cases
Identify unknown token from contract
“I just found this contract address 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 in my wallet — can you tell me what token it is, its symbol, and how many decimals it uses?”
Pre-swap token validation
“Before I execute this token swap, can you pull the metadata for contract 0x6B175474E89094C44Da98b954EedeAC495271d0F so I can confirm it's actually DAI with 18 decimals?”
DeFi dashboard token enrichment
“I'm building a portfolio tracker — fetch the name, symbol, and decimals for each of these token contracts so I can display them properly: 0xdAC17F958D2ee523a2206206994597C13D831ec7”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/stable/token/metadataWhen to prefer
Choose this endpoint when you need quick, pay-per-call token metadata lookup without a subscription, especially across a broad range of blockchain networks. Ideal for agents that need on-demand token resolution for DeFi workflows, portfolio tracking, or pre-trade validation without maintaining a dedicated indexer.
Side effects
- Invalid or malformed contract address returns an error
- Contract address exists but is not a token contract (e.g. a plain wallet or non-ERC20 contract)
- Network not supported among the 57+ chains returns an unsupported network error
- Payment failure via x402 protocol prevents request from processing
- Rate limits or server errors on the Vercel deployment cause timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| contractAddress | string |
Tags
x402
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