Api Endpoint

Onchain Query API

Latest block on any major EVM chain: block number, timestamp, age in seconds, base fee and gas used/limit. The cheapest possible liveness and chain-tip check for an agent: confirm a chain is progressing, timestamp an observation, or pick a block for a query.

Open interactive test console

Offering

Provider: chain.cyberwarex.com
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://chain.cyberwarex.com/block
MIME type: application/json
First seen: 2026-10-16T01:50:06.715Z
Last seen: 2026-11-02T02:42:42.046Z
Tags: Block, blockchain, EVM, chain-tip, onchain-data

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2"
  }
]

Observed health

Status: Healthy
Latest latency: 374 ms
Average latency: 681 ms
HTTP status: 402
Last checked: 2026-11-02T02:42:42.039Z
Reachability: 92.9% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "chain": {
          "type": "string",
          "enum": [
            "base",
            "ethereum",
            "arbitrum",
            "optimism",
            "polygon"
          ],
          "default": "base",
          "description": "EVM chain to query."
        }
      },
      "additionalProperties": false
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "additionalProperties": false,
          "properties": {
            "chain": {
              "default": "base",
              "description": "EVM chain to query.",
              "enum": [
                "base",
                "ethereum",
                "arbitrum",
                "optimism",
                "polygon"
              ],
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "age_seconds": {
              "type": "integer"
            },
            "base_fee_gwei": {
              "type": "number"
            },
            "chain": {
              "type": "string"
            },
            "chain_id": {
              "type": "integer"
            },
            "gas_limit": {
              "type": "integer"
            },
            "gas_used": {
              "type": "integer"
            },
            "hash": {
              "type": "string"
            },
            "number": {
              "type": "integer"
            },
            "timestamp": {
              "type": "integer"
            },
            "tx_count": {
              "type": "integer"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}