# Synapse API — Sei Token Metadata Lookup

> Synapse API — Sei 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).

Fetches on-chain token metadata for a given contract address on the Sei blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/sei/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-sei-token-metadata-lookup-9e685b08
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tI8Brg9KWrZIfVlyuEnL7

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-sei-token-metadata-lookup-9e685b08 -d '<json body>'
```

Example prompt: Can you look up the token metadata — name, symbol, and decimals — for the Sei blockchain contract at address 0x3894085Ef7Ff0f0aeDf52E2A2704928d1Ec074F2?

## When to prefer this

Use this endpoint when you specifically need token metadata from the Sei blockchain network. Prefer this over generic multi-chain solutions when you know the token is on Sei and want a fast, pay-per-call lookup without managing RPC infrastructure. It is ideal for agents enriching DeFi data, building dashboards, or verifying token identity on Sei.

## Known failure modes

- Invalid or malformed contract address returns an error response
- Contract address does not correspond to a token contract (e.g. it's a plain wallet or non-ERC20 contract)
- Network connectivity issues to Sei RPC nodes causing timeouts
- Contract exists but has no metadata functions (non-standard token)
- Payment failure via 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 Sei network contract address, typically including the token name, symbol, and decimal precision as stored 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-sei-token-metadata-lookup-9e685b08/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)