# Synapse API — Sonic Token Metadata

> Synapse API — Sonic 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 2026-10-18).

Retrieves on-chain token metadata for a given contract address on the Sonic blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/sonic/token/metadata?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-sonic-token-metadata-55f9cbcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pzYEKiCqpJm7moRD5lkQK

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-sonic-token-metadata-55f9cbcb -d '<json body>'
```

Example prompt: What are the name, symbol, and decimals for the token at Sonic contract address 0x29219dd400f2Bf60E5a23d13Be72B486D4038894?

## When to prefer this

Use this endpoint when you need to resolve token metadata specifically on the Sonic blockchain network by contract address. Prefer this over generic multi-chain explorers when you know the contract is on Sonic and need fast, pay-per-call programmatic access without API key management.

## Known failure modes

- Invalid or malformed contract address returns a 400 or error response
- Contract address not found on Sonic network returns null or empty metadata
- Non-token contract address (e.g. a proxy or NFT contract) may return incomplete or unexpected metadata
- Network timeouts or RPC issues on Sonic chain may cause 500 errors
- Payment failure via x402 protocol prevents the request from being processed

## 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 metadata for the specified token contract on the Sonic blockchain, including the token name, symbol, number of decimals, and potentially other contract-level details such as total supply or owner address.

## 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-sonic-token-metadata-55f9cbcb/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)