# Synapse API — Plasma Token Metadata

> Synapse API — Plasma 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 2026-10-12).

Returns on-chain metadata for a token given its contract address across 57+ blockchain networks

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/plasma/token/metadata?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-plasma-token-metadata-17848b19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W4FfvOqht1Sq-CGto_y_g

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-plasma-token-metadata-17848b19 -d '<json body>'
```

Example prompt: Can you look up the token metadata — name, symbol, and decimals — for the contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48?

## When to prefer this

Choose this endpoint when you need fast, pay-per-call token metadata lookups without committing to a subscription, especially when querying across a wide range of blockchains (57+). Prefer this over free public RPC calls when you need reliable, aggregated multi-chain support without managing your own node infrastructure.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address not found on any supported network returns empty or 404-style response
- Contract exists but is not a standard token (e.g. NFT, proxy) may return incomplete metadata
- Network congestion or RPC unavailability may cause timeouts
- 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 structured on-chain token metadata for the given contract address, typically including token name, symbol, decimal precision, and other relevant on-chain attributes registered for that token contract across supported blockchain networks.

## 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-plasma-token-metadata-17848b19/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)