Tool detail

Onchain Query API

Returns the latest block number, timestamp, age, base fee, and gas used/limit for a chosen EVM chain.

Categories: Onchain data

Use when

confirm an EVM chain is progressing right now
timestamp an observation against the current chain tip
pick a recent block number for a downstream query

Not for

not historical blocks — latest block only, no block-by-number lookup

Inputs

GET query param: chain (enum: base/ethereum/arbitrum/optimism/polygon, default base, optional)

Admitted input schema

{
  "type": "object",
  "properties": {
    "chain": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "enum": [
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "polygon"
      ],
      "description": "EVM chain to query.",
      "default": "base"
    }
  },
  "required": [],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://chain.cyberwarex.com/block

Payment

Protocol: x402
Listed price: 0.001 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://chain.cyberwarex.com/block
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z