Api Endpoint

Onchain Query API

Native coin balance (ETH or POL) of any address on Base, Ethereum, Arbitrum, Optimism or Polygon, with USD value. One RPC read, no key, no node. Use it to check that a wallet is funded before sending, or to watch a counterparty balance.

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/balance
MIME type: application/json
First seen: 2026-10-23T22:14:09.550Z
Last seen: 2026-11-02T11:01:50.214Z
Tags: balance, Wallet, blockchain, EVM, 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: 1336 ms
Average latency: 1015 ms
HTTP status: 402
Last checked: 2026-11-02T11:01:50.209Z
Reachability: 100% over 7 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": {
        "address": {
          "type": "string",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "description": "Wallet or contract address."
        },
        "chain": {
          "type": "string",
          "enum": [
            "base",
            "ethereum",
            "arbitrum",
            "optimism",
            "polygon"
          ],
          "default": "base",
          "description": "EVM chain to query."
        }
      },
      "required": [
        "address"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "additionalProperties": false,
          "properties": {
            "address": {
              "description": "Wallet or contract address.",
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "chain": {
              "default": "base",
              "description": "EVM chain to query.",
              "enum": [
                "base",
                "ethereum",
                "arbitrum",
                "optimism",
                "polygon"
              ],
              "type": "string"
            }
          },
          "required": [
            "address"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "address": {
              "type": "string"
            },
            "balance": {
              "type": "number"
            },
            "chain": {
              "type": "string"
            },
            "symbol": {
              "type": "string"
            },
            "usd": {
              "description": "null if the price feed is down",
              "type": [
                "number",
                "null"
              ]
            },
            "wei": {
              "type": "string"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}