# Ethereum Latest Block Height

> Ethereum Latest Block Height is a paid API for AI agents from appearing-clinics-show-wrote.trycloudflare.com, paid per call via x402, price unknown, status down (last checked 2026-09-15).

Returns the current Ethereum mainnet canonical block height, timestamp, head age, and provenance from a verified batch.

## Facts

- Endpoint: GET https://appearing-clinics-show-wrote.trycloudflare.com/ethereum-block-height-sample
- Price: price unknown
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ethereum-latest-block-height-47ec2a00
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_doXxEAXe9NiFwYArAz8Zq

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 ethereum-latest-block-height-47ec2a00
```

Example prompt: What is the current Ethereum mainnet block height — give me the block number, its timestamp, and how old the chain tip is right now.

## When to prefer this

Choose this endpoint when you need a quick, lightweight lookup of the current Ethereum mainnet block height and chain tip age without constructing a full RPC call. It is ideal for monitoring, dashboards, or DApp sync checks where only the canonical block number and recency metadata are needed, and when cost-sensitivity matters (free sample, $0.0008 paid). Prefer a full Ethereum node RPC for deeper block data or custom queries.

## Known failure modes

- Network or Cloudflare tunnel unavailability returns a 5xx error with no block data
- Chain data lag if the underlying node is behind mainnet — head age may be stale
- Free sample endpoint may return cached or bounded data rather than true real-time chain tip
- No input parameters accepted — any query parameters are ignored

## How this service works

Free live Ethereum mainnet chain-tip sample. The paid $0.0008 API returns canonical block height, timestamp, head age, and provenance from one bounded verified batch.

## Output

Returns the canonical Ethereum mainnet block height (block number), the block timestamp, the age of the chain head (how long ago the latest block was produced), and provenance metadata from a verified batch indicating the data source and integrity.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ethereum-latest-block-height-47ec2a00/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from appearing-clinics-show-wrote.trycloudflare.com](https://www.zero.xyz/host/appearing-clinics-show-wrote.trycloudflare.com/llms.txt)