# SilverbackDeFi Token Metadata Lookup

> SilverbackDeFi Token Metadata Lookup is a paid API for AI agents from x402.silverbackdefi.app, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Retrieves on-chain metadata for a given ERC-20 token by contract address on Base chain

## Facts

- Endpoint: POST https://x402.silverbackdefi.app/api/v1/token-metadata/0x4200000000000000000000000000000000000006
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-silverbackdefi-app-dc229285
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tQjGsvbJLSToMz2nGtftw

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 x402-silverbackdefi-app-dc229285 -d '<json body>'
```

Example prompt: What are the name, symbol, and decimals for the token at contract address 0x4200000000000000000000000000000000000006 on Base chain?

## When to prefer this

Use this endpoint when you need to resolve human-readable metadata (name, symbol, decimals) for an ERC-20 token on Base chain given a raw contract address — especially useful before executing swaps, displaying token info, or enriching transaction data with readable labels.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address does not exist on Base chain
- Address is not an ERC-20 token contract
- Payment not provided or insufficient USDC
- Network or RPC errors fetching on-chain data

## Output

Returns on-chain metadata for the specified ERC-20 token contract, including token name, symbol, decimal precision, and other contract-level details from the Base blockchain.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-silverbackdefi-app-dc229285/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.silverbackdefi.app](https://www.zero.xyz/host/x402.silverbackdefi.app/llms.txt)