# Base Blockchain Current Block Number

> Base Blockchain Current Block Number is a paid API for AI agents from heb-utils-x402.hebutils-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).

Returns the current block number and its ISO timestamp on the Base blockchain network

## Facts

- Endpoint: GET https://heb-utils-x402.hebutils-api.workers.dev/base-block-number?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-blockchain-current-block-number-36289a35
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WuHQzXuRKrsiPsuji_zJN

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 base-blockchain-current-block-number-36289a35
```

Example prompt: What is the current block number on Base right now, and when was that block timestamped?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call lookup of the current Base L2 block number and timestamp without managing your own RPC node or API keys. Prefer it over raw RPC calls when you want a simple REST interface with micropayment billing and no monthly subscription commitment.

## Known failure modes

- Base RPC node unavailable — returns an error if the underlying Base node is unreachable
- Rate limiting — too many requests without valid x402 payment may result in 402 Payment Required
- Network congestion — slight delays in block propagation may cause minor staleness in response
- Invalid payment — missing or invalid USDC payment header returns 402

## How this service works

Pay-per-call utility APIs in USDC on Base: Hebrew calendar and text tools, Shabbat times, Base token control-risk screen and address summary, plus finance arithmetic tools. General information and arithmetic only; not investment, tax or legal advice and not a recommendation to buy, sell or hold anything.

## Output

A JSON object containing the current Base blockchain block number as an integer and the block's timestamp in ISO 8601 format (e.g. {"block_number": 12345678, "timestamp_iso": "2025-01-01T00:00:00.000Z"})

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "block_number": 1,
  "timestamp_iso": "2026-10-10T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-blockchain-current-block-number-36289a35/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from heb-utils-x402.hebutils-api.workers.dev](https://www.zero.xyz/host/heb-utils-x402.hebutils-api.workers.dev/llms.txt)