Beauty & Personal Care · x402 · early usage

ERC20 and native ETH wallet balance on Base or Ethereum mainnet, for a 0x address or an…

by x402.ochinimus.app · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls8

30d payers3

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

ERC20 and native ETH wallet balance on Base or Ethereum mainnet, for a 0x address or an ENS name. decimals() and symbol() are read from the contract at request time rather than assumed, because assuming 18 reports a USDC balance a trillion times too large. Use when you need to answer: What does this EVM address hold? ENS is resolved through two independent resolvers and the answer is used only…

Tags: base · ethereum · wallet · balance · erc20 · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "address": "0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6"
}

Output example

{
  "data": {
    "address": "0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6",
    "asset": "ETH",
    "balance": 0.000094829,
    "balance_wei": "94829352850506",
    "chain": "Base",
    "chain_id": 8453,
    "source": "rpc:mainnet.base.org"
  },
  "paid": true,
  "tool": "get_base_balance"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/29691.json for the price and payment options.
Pay. Call GET https://x402.ochinimus.app/api/base-balance. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Solana, Base, Polygon, Arbitrum One, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Solana, Base, Polygon, Arbitrum One
Demand: 8 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.005	4a8o45skRPcyjAdyR8yES215Swvh8uTpZD6KLarhxCJ7	300s
exact	Base eip155:8453	USDC	$0.005	0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6	300s
exact	Polygon eip155:137	USDC	$0.005	0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6	300s
exact	Arbitrum One eip155:42161	USDC	$0.005	0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "4a8o45skRPcyjAdyR8yES215Swvh8uTpZD6KLarhxCJ7",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x22DB3A9686EE5261e7Bf3ed4f91277232E8076e6",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "data": {
          "properties": {
            "address": {
              "type": "string"
            },
            "asset": {
              "type": "string"
            },
            "balance": {
              "type": "number"
            },
            "balance_wei": {
              "type": "string"
            },
            "chain": {
              "type": "string"
            },
            "chain_id": {
              "type": "number"
            },
            "source": {
              "type": "string"
            }
          },
          "type": "object"
        },
        "paid": {
          "type": "boolean"
        },
        "tool": {
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "data": {
      "address": "string",
      "asset": "string",
      "balance": 0,
      "balance_wei": "string",
      "chain": "string",
      "chain_id": 0,
      "source": "string"
    },
    "paid": true,
    "tool": "string"
  },
  "type": "string"
}

Examples

curl

curl "https://x402.ochinimus.app/api/base-balance"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402.ochinimus.app/api/base-balance");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402.ochinimus.app/api/base-balance")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: x402.ochinimus.app
Endpoint: https://x402.ochinimus.app/api/base-balance
Machine-readable: /resources/29691.json