# Synapse API — Soneium Latest Block

> Synapse API — Soneium Latest Block 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).

Fetches the most recent block data from the Soneium blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/soneium/block/latest
- 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-soneium-latest-block-f305c22f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-DDafCKuoK99HGosMRwzO

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-soneium-latest-block-f305c22f -d '<json body>'
```

Example prompt: What's the latest block on the Soneium blockchain right now — give me the block number, hash, and timestamp.

## When to prefer this

Choose this endpoint when you specifically need Soneium blockchain block data and want to pay per call via x402 USDC micropayments without managing your own RPC node or API key subscriptions. Useful for lightweight or infrequent polling of Soneium chain state without a full node setup.

## Known failure modes

- Network unavailability returns a 5xx error
- Payment not attached or insufficient USDC results in 402 Payment Required
- Soneium RPC node downtime may return stale or error responses
- Malformed request body returns 400 Bad 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 data about the most recently produced block on the Soneium network, typically including block number, block hash, parent hash, timestamp, gas used, transaction count, and miner/validator address.

## 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-soneium-latest-block-f305c22f/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)