# Synapse API — Worldchain Token Metadata

> Synapse API — Worldchain Token Metadata 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).

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

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/worldchain/token/metadata
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-worldchain-token-metadata-8b31580f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G6Ilpv0lxe_48reCYV6jK

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-worldchain-token-metadata-8b31580f -d '<json body>'
```

Example prompt: What token is deployed at contract address 0x1234...abcd on Worldchain — can you get me its name, symbol, and decimals?

## When to prefer this

Choose this endpoint when you specifically need token metadata from the Worldchain blockchain network and want a pay-per-call model without a subscription. Prefer this over general blockchain explorers when you need programmatic, agent-friendly access with micropayment billing via x402.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address does not exist on Worldchain returns not found
- Contract is not a token contract (e.g. a plain wallet or non-ERC20 contract) may return empty or partial metadata
- Network congestion or RPC timeout may cause slow or failed responses
- Payment failure via x402 protocol blocks the request

## 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 Worldchain contract address, typically including the token name, symbol, decimal precision, and potentially supply or other ERC20-standard fields stored in the contract.

## 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-worldchain-token-metadata-8b31580f/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)