# Synapse API — opBNB Token Metadata Lookup

> Synapse API — opBNB 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 2026-09-16).

Fetches on-chain token metadata (name, symbol, decimals, supply, etc.) for a given contract address on the opBNB blockchain network.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/opbnb/token/metadata
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-opbnb-token-metadata-lookup-32e64f19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MEcxnP94LnCd8p9VIDWwh

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-opbnb-token-metadata-lookup-32e64f19 -d '<json body>'
```

Example prompt: Look up the token metadata for contract address 0xABC123... on the opBNB network — I need its name, symbol, decimals, and total supply.

## When to prefer this

Use this endpoint when you specifically need token metadata from the opBNB (BNB Chain Layer-2) network. It is purpose-built for opBNB and part of a multi-chain suite supporting 57+ networks, so prefer it over generic blockchain APIs when working with opBNB contracts specifically.

## Known failure modes

- Invalid or malformed contract address returns an error or empty response
- Contract address exists but is not a token contract (e.g. a plain wallet or non-ERC-20 contract) may return null fields
- Contract not deployed on opBNB network returns not found
- Network congestion or RPC issues may cause timeouts
- Payment failure (x402) if USDC balance is insufficient

## 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 specified contract address on opBNB, typically including token name, symbol, number of decimals, and total supply as recorded on the blockchain.

## 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-opbnb-token-metadata-lookup-32e64f19/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)