# Aether Base Block Lookup

> Aether Base Block Lookup is a paid API for AI agents from aether-x402.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Retrieves metadata for a specific block on the Base blockchain, including block number, transaction count, and timestamp.

## Facts

- Endpoint: POST https://aether-x402.vercel.app/v1/base/block?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aether-base-block-lookup-0b44a9b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_A9i84aY1ZHueRkdj7tFXu

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 aether-base-block-lookup-0b44a9b2 -d '<json body>'
```

Example prompt: Can you pull the block data for block 21000000 on Base — I need the transaction count and timestamp for it?

## When to prefer this

Use this endpoint when you need fast, pay-per-call access to Base blockchain block metadata (block number, transaction count, timestamp) without setting up your own RPC node or managing API keys — especially in agent workflows that pay via USDC on Base using the x402 protocol.

## Known failure modes

- Invalid or non-existent block number returns an error or empty response
- Block number too far in the future (not yet produced) returns not found
- Malformed input type (wrong schema) returns a validation error
- Payment failure via x402 protocol blocks the request before processing

## How this service works

Pay-per-call Base onchain data, token risk verdicts and x402 payability audits over x402 (USDC on Base).

## Output

Returns a JSON object with the block number as a string, the transaction count (txCount) as an integer, and the block timestamp as a Unix epoch string for the requested Base blockchain block.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "block": {
   "type": [
    "string",
    "integer"
   ]
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "number": "21000000",
  "txCount": 120,
  "timestamp": "1790000000"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aether-base-block-lookup-0b44a9b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aether-x402.vercel.app](https://www.zero.xyz/host/aether-x402.vercel.app/llms.txt)