# Synapse API — Token Metadata Lookup

> 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 2026-10-16).

Retrieves on-chain metadata for a token given its contract address, supporting 57+ blockchain networks.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/tempo/token/metadata?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-token-metadata-lookup-85668cd8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0r0LTwi6SbEXi6PMoAoTZ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synapse-api-token-metadata-lookup-85668cd8 -d '<json body>'
```

Example prompt: Can you look up the token metadata for contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and tell me the name, symbol, and decimals?

## When to prefer this

Use this endpoint when you need to resolve raw token contract addresses into human-readable metadata (name, symbol, decimals) across a wide range of blockchains. Prefer this over manual chain RPC calls when you need a simple, pay-per-call abstraction supporting 57+ networks without managing your own node infrastructure.

## Known failure modes

- Invalid or malformed contract address returns an error response
- Contract address does not exist on the queried network
- Network unavailable or unsupported chain returns a failure
- Rate limiting or payment failure (x402) blocks the request
- Contract exists but is not a standard token contract, returning partial or empty metadata

## 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 token metadata for the given contract address, typically including token name, symbol, number of decimals, and potentially other contract-level details such as total supply or token standard.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "contractAddress": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-token-metadata-lookup-85668cd8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)