# Synapse API — Unichain Token Metadata Lookup

> Synapse API — Unichain 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 token metadata (name, symbol, decimals, etc.) for a given ERC-20 contract address on the Unichain blockchain network.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/unichain/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-unichain-token-metadata-lookup-4349dbf9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HWe2PhfTMJZf4NOX7_MsQ

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-unichain-token-metadata-lookup-4349dbf9 -d '<json body>'
```

Example prompt: Can you look up the token metadata for the Unichain contract address 0x1234567890abcdef1234567890abcdef12345678 — I need the name, symbol, and decimals.

## When to prefer this

Use this endpoint when you need to resolve a raw Unichain smart contract address into human-readable token metadata (name, symbol, decimals). Prefer this over generic blockchain explorers when you need a fast, pay-per-call programmatic lookup specifically on the Unichain network without setting up your own RPC node.

## Known failure modes

- Invalid or malformed contract address returns an error or empty response
- Contract address that is not an ERC-20 token may return null metadata or an error
- Network issues or Unichain RPC unavailability may cause timeouts
- Payment failure via x402 protocol results in 402 response and no data returned
- Non-existent contract address returns empty or error response

## 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 ERC-20 token metadata for the specified Unichain contract address, typically including the token name, symbol, and decimal precision. This allows agents to humanize raw contract addresses into recognizable token identities.

## 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-unichain-token-metadata-lookup-4349dbf9/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)