# Synapse API — Humanity Token Transfers

> Synapse API — Humanity Token Transfers 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 2026-09-13).

Retrieves token transfer history for a given wallet address on the Humanity protocol, with filtering by block range, contract addresses, and pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/humanity/token/transfers
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-humanity-token-transfers-19d43390
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JyH1-B9Jzm_tJFWKPV_-q

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-transfers-19d43390 -d '<json body>'
```

Example prompt: Pull all token transfers for wallet address 0xABC123 on the Humanity protocol, sorting from oldest to newest, and limit results to 100 transfers starting from block 1000000 to block 2000000.

## When to prefer this

Use this endpoint when you need on-chain token transfer history specifically for the Humanity protocol and want block-range filtering, contract address filtering, and pagination in a single pay-per-call API with no subscription required. Prefer this over general blockchain explorers when integrating into an automated agent workflow that needs structured JSON output.

## Known failure modes

- Invalid wallet address format returns an error
- Unknown or malformed contract address silently returns no results
- Block range too large may time out or return partial results
- Invalid pageKey causes pagination error
- Missing required 'owner' field returns validation error
- Network or provider downtime results in 502/503 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 a list of token transfer records for the specified wallet on the Humanity protocol, each containing details such as transaction hash, block number, from/to addresses, token contract, value, and asset metadata. Supports pagination via a pageKey for large result sets.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string"
  },
  "owner": {
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  },
  "toBlock": {
   "type": "string"
  },
  "maxCount": {
   "type": "number"
  },
  "fromBlock": {
   "type": "string"
  },
  "contractAddresses": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-humanity-token-transfers-19d43390/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)