# 47620 Base Block Header API

> 47620 Base Block Header API is a paid API for AI agents from 47620.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Returns the block header and summary for the latest (or a specified) Base blockchain block, including hash, timestamp, transaction count, gas used, and base fee.

## Facts

- Endpoint: GET https://47620.xyz/x/base/block/latest?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/47620-base-block-header-api-010df6ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nJ1xcTNJ96OeAVjevQR_j

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 47620-base-block-header-api-010df6ca
```

Example prompt: What does the latest Base blockchain block look like — give me the hash, timestamp, transaction count, gas used, and base fee.

## When to prefer this

Use this endpoint when you need lightweight block header data (hash, timestamp, tx count, gas used, base fee) for the Base L2 network specifically, especially for real-time monitoring or per-block lookups. Prefer over a full node RPC call when you want a simple REST interface with per-call micropayment pricing and no infrastructure setup.

## Known failure modes

- Invalid or non-existent block number returns an error or empty result
- Network congestion may cause stale or delayed latest block data
- Malformed path parameter (non-numeric, non-'latest') may return a 400 error
- Payment failure via x402 protocol results in 402 response and no data

## How this service works

Header + summary for a base block by number (or "latest"): hash, timestamp, tx count, gas used and base fee.

## Output

A JSON object containing block header and summary fields for the requested Base block: block hash, timestamp, transaction count, gas used, and base fee per gas. Supports optional field filtering to return only selected keys.

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "number"
     ],
     "properties": {
      "number": {
       "type": "string",
       "description": "Header + summary for a base block by number (or \"latest\"): hash, timestamp, tx count, gas used and base fee."
      }
     },
     "additionalProperties": false
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "fields": {
       "type": "string",
       "description": "Optional comma-separated top-level response keys to keep (e.g. \"health,slot,solUsd\"). Omit for the full payload."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "endpoint"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "endpoint": {
       "type": "string"
      }
     },
     "additionalProperties": true
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/47620-base-block-header-api-010df6ca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 47620.xyz](https://www.zero.xyz/host/47620.xyz/llms.txt)