# Synapse API — Latest Block Lookup (BOB Network)

> Synapse API — Latest Block Lookup (BOB Network) 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 most recent block data from the BOB blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bob/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-block-lookup-bob-network-39903b86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LA-aN51QNDbUX6EK_91kf

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-block-lookup-bob-network-39903b86 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you specifically need the latest block from the BOB (Build on Bitcoin) blockchain network and are already operating within the Synapse API pay-per-call x402 ecosystem. It is best suited for lightweight, real-time block height checks across agents that need frequent polling without maintaining their own RPC infrastructure.

## Known failure modes

- Network unavailable — BOB RPC node unreachable, returns 5xx error
- Payment failure — insufficient USDC balance or x402 payment not processed, returns 402
- Invalid request body — missing required fields (type, method, bodyType, body), returns 400
- Rate limiting — too many requests in short period, returns 429
- BOB network congestion — delayed response or timeout if the underlying chain is under load

## 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 BOB blockchain network, including block number, block hash, parent hash, timestamp, miner address, gas used, gas limit, and other standard block header fields.

## 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-block-lookup-bob-network-39903b86/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)