# Synapse API — Latest Humanity Block Lookup

> Synapse API — Latest Humanity Block 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 2026-09-13).

Fetches the latest block data from the Humanity blockchain network via a pay-per-call POST endpoint

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/humanity/block/latest
- 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-latest-humanity-block-lookup-700820d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ds_qPidJFe_xg1yCdIgNM

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-latest-humanity-block-lookup-700820d9 -d '<json body>'
```

Example prompt: Can you fetch the latest block from the Humanity blockchain for me right now?

## When to prefer this

Choose this endpoint when you need real-time or near-real-time access to the latest block on the Humanity blockchain specifically, and are willing to pay per call via USDC over x402. It is appropriate for agents monitoring chain liveness, verifying transaction inclusion timing, or syncing application state to the Humanity network head.

## Known failure modes

- Network or RPC node unavailability causing a timeout or 5xx error
- Payment failure via x402 protocol resulting in 402 Payment Required response
- Malformed POST body causing a 400 Bad Request
- Temporary chain sync lag returning a stale or inconsistent block
- Rate limiting or quota exhaustion returning 429 Too Many Requests

## 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 the latest block data from the Humanity blockchain network, including block number, block hash, timestamp, and related on-chain metadata reflecting the current chain head.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "properties": {},
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-latest-humanity-block-lookup-700820d9/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)