# Mint Intel: Base Block Number

> Mint Intel: Base Block Number is a paid API for AI agents from mintintel.35-171-220-195.sslip.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the current block height (chain tip) of the Base blockchain via eth_blockNumber, with sub-1-second caching.

## Facts

- Endpoint: GET https://mintintel.35-171-220-195.sslip.io/v1/base/block-number?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mint-intel-base-block-number-ccf06f2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Bnk1V0kGNI-VVB2IMbqoz

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 mint-intel-base-block-number-ccf06f2a
```

Example prompt: What's the current block number on the Base blockchain right now?

## When to prefer this

Use this endpoint when you need the cheapest, fastest liveness signal or chain-tip reference for Base. It requires no input parameters and returns in real time, making it ideal for polling loops, health checks, or timestamp anchoring in Base-native agent workflows. Prefer this over full block-detail endpoints when you only need the block number, not transaction data.

## Known failure modes

- Upstream RPC node unreachable — returns 5xx error
- Stale cache if Base experiences a block production halt — block number may lag real tip by up to 1 second
- Rate limiting if call volume exceeds plan — returns 429
- Payment not fulfilled — returns 402 with payment details

## How this service works

Latest Base block height - current chain tip via eth_blockNumber (cached <=1 s). The cheapest liveness / clock tick for Base agents.

## Output

A JSON object containing the Base chain ID (integer) and the current block number (integer) representing the latest confirmed block at the time of the call, cached for up to 1 second.

## 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",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "chainId",
      "blockNumber"
     ],
     "properties": {
      "chainId": {
       "type": "integer"
      },
      "blockNumber": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mint-intel-base-block-number-ccf06f2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mintintel.35-171-220-195.sslip.io](https://www.zero.xyz/host/mintintel.35-171-220-195.sslip.io/llms.txt)