Api Endpoint

Onchain Query API

Live gas across Base, Ethereum, Arbitrum, Optimism and Polygon in ONE call, sorted cheapest first: gas price, base fee, median priority fee and the estimated USD cost of a 21k-gas transfer and a 200k-gas swap on each chain. Lets an agent pick the cheapest chain to execute on, or size a fee, without five separate RPC calls. 10-second cache.

Open interactive test console

Offering

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

Endpoint context

URL: https://chain.cyberwarex.com/gas-compare
MIME type: application/json
First seen: 2026-10-23T22:14:09.550Z
Last seen: 2026-11-01T15:08:50.284Z
Tags: Gas, Fees, Multichain, EVM, cheapest-chain

Website

Payment pricing

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

Payment option 1: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2"
  }
]

Observed health

Status: Healthy
Latest latency: 1233 ms
Average latency: 853 ms
HTTP status: 402
Last checked: 2026-11-01T08:11:13.322Z
Reachability: 100% over 6 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": {},
      "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": {},
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "chains": {
              "items": {
                "properties": {
                  "base_fee_gwei": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "chain": {
                    "type": "string"
                  },
                  "error": {
                    "type": "string"
                  },
                  "est_cost": {
                    "type": "object"
                  },
                  "gas_price_gwei": {
                    "type": "number"
                  },
                  "native": {
                    "type": "string"
                  },
                  "native_usd": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "priority_fee_gwei": {
                    "type": [
                      "object",
                      "null"
                    ]
                  }
                },
                "type": "object"
              },
              "type": "array"
            },
            "cheapest": {
              "description": "Chain with the lowest USD cost for a 21k transfer.",
              "type": "string"
            },
            "count": {
              "type": "integer"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}