# Synapse API — Abstract Token Metadata

> Synapse API — Abstract 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 2026-10-27).

Fetches on-chain token metadata (name, symbol, decimals, supply, etc.) for a given smart contract address across 57+ blockchain networks

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/abstract/token/metadata?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-abstract-token-metadata-3c31b852
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EXKKea_xgp8nW8g4nrzIz

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-abstract-token-metadata-3c31b852 -d '<json body>'
```

Example prompt: What token is deployed at contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — give me the name, symbol, and decimals.

## When to prefer this

Use this endpoint when you need to resolve a smart contract address to its token metadata (name, symbol, decimals, supply) across a broad range of blockchain networks without setting up your own RPC connections. Particularly useful for agents enriching token data in DeFi, wallet, or portfolio applications where the contract address is known but human-readable metadata is needed. At $0.01 USDC per call via x402, it is cost-effective for on-demand single-token lookups.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address exists but is not a token contract (no ERC-20/ERC-721 interface) may return empty or error
- Unsupported blockchain network may return not-found or unsupported error
- Rate limiting or payment failure via x402 protocol blocks the call
- Network RPC timeouts for specific chains may cause delays or failures

## 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 provided contract address, including token name, symbol, number of decimals, total supply, and potentially other contract-level fields, sourced directly from 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-abstract-token-metadata-3c31b852/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)