# Synapse API — Humanity Token Metadata Lookup

> Synapse API — Humanity 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 2026-09-15).

Retrieves metadata for a Humanity Protocol token given its contract address across blockchain networks

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/humanity/token/metadata
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-humanity-token-metadata-lookup-653740ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VO1Ro74B8J_zDAtODRAFA

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-humanity-token-metadata-lookup-653740ee -d '<json body>'
```

Example prompt: Can you look up the token metadata for the Humanity Protocol contract at 0xAbCd1234... and tell me the token name, symbol, and supply?

## When to prefer this

Use this endpoint when you need to resolve on-chain token metadata for a Humanity Protocol token contract address and want a pay-per-call, no-subscription approach via USDC micropayments. Prefer this over manually querying blockchain nodes if you need a quick, hosted lookup without managing RPC infrastructure.

## Known failure modes

- Invalid or malformed contract address returns an error or empty result
- Contract address not found on supported blockchain network
- Network or RPC timeout causing failed metadata retrieval
- Contract exists but is not a standard token contract, resulting in incomplete metadata
- Missing contractAddress field in request body returns a validation error

## 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 metadata for the specified token contract, typically including the token name, symbol, total supply, decimals, and other on-chain contract attributes associated with the Humanity Protocol token.

## 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-humanity-token-metadata-lookup-653740ee/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)