Roundhouse

Ontario Protocol

What does this Base wallet hold? ETH, USDC and about 25 widely held Base tokens, plus up to 20 ERC-20 contracts you name, with symbol, decimals, raw and formatted amounts and the block number read, live from Base RPC. Required: address. $0.002 USDC on Base. Failed read, no charge. No account, no API key. Base mainnet only; no prices or USD values; tokens outside the list and your extras are not discovered. By Ontario Protocol.

TradingLiveeip155:8453Exactvia cdp
https://ontarioprotocol.com/api/x402/base/balances
Base wallet balanceWallet balanceserc20 balancePortfolioBase
Settlements · 30d
12
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$10.33
Verified settled volume
33 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-26 01:14Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "quote_id": "038b9c81dfe24590906ae581c7197088",
        "resourceUrl": "https://ontarioprotocol.com/api/x402/base/balances",
        "quote_expires_at": 1793017259
      },
      "payTo": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "quote_id": "038b9c81dfe24590906ae581c7197088",
  "resource": {
    "url": "https://ontarioprotocol.com/api/x402/base/balances",
    "tags": [
      "base wallet balance",
      "wallet balances",
      "erc20 balance",
      "portfolio",
      "base"
    ],
    "iconUrl": "https://ontarioprotocol.com/static/ontario-logo-192.png",
    "mimeType": "application/json",
    "description": "What does this Base wallet hold? ETH, USDC and about 25 widely held Base tokens, plus up to 20 ERC-20 contracts you name, with symbol, decimals, raw and formatted amounts and the block number read, live from Base RPC. Required: address. $0.002 USDC on Base. Failed read, no charge. No account, no API key. Base mainnet only; no prices or USD values; tokens outside the list and your extras are not discovered. By Ontario Protocol.",
    "serviceName": "Ontario Protocol"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "address": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec"
          }
        },
        "output": {
          "example": {
            "block": 53049908,
            "native": {
              "raw": "14098622686720",
              "symbol": "ETH",
              "decimals": 18,
              "formatted": "0.00001409862268672"
            },
            "schema": "ontario.base_balances.v1",
            "source": "Base RPC",
            "tokens": [
              {
                "raw": "10402131",
                "source": "default_list",
                "symbol": "USDC",
                "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "decimals": 6,
                "formatted": "10.402131"
              }
            ],
            "address": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
            "network": "eip155:8453",
            "read_at": "2026-10-25T00:46:04Z",
            "coverage": {
              "requested": 0,
              "default_list_size": 25,
              "default_list_unread": 0
            },
            "coverage_note": "Default-list tokens appear only with a nonzero balance; requested tokens always appear. Tokens outside the list and the request are not discovered. No prices or USD values.",
            "block_timestamp": "2026-10-25T00:46:03Z"
          }
        }
      },
      "schema": {
        "type": "object",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "queryParams"
            ],
            "properties": {
              "queryParams": {
                "type": "object",
                "required": [
                  "address"
                ],
                "properties": {
                  "tokens": {
                    "type": "string",
                    "description": "Optional comma-separated ERC-20 contract addresses to read as well, max 20."
                  },
                  "address": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "description": "Base wallet or contract address to read."
                  }
                },
                "additionalProperties": false
              }
            }
          },
          "output": {
            "type": "object",
            "required": [
              "example"
            ],
            "properties": {
              "example": {
                "type": "object",
                "additionalProperties": true
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0xa2d7…CA3ec. The signed payment is good for 5 minutes.

Paid to
0xa2d7…CA3ec
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "quote_id": "fc64548de9474d6e868c24c0d53847cc",
      "resourceUrl": "https://ontarioprotocol.com/api/x402/base/balances",
      "quote_expires_at": 1792977587
    },
    "payTo": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "address": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec"
        }
      },
      "output": {
        "example": {
          "block": 53049908,
          "native": {
            "raw": "14098622686720",
            "symbol": "ETH",
            "decimals": 18,
            "formatted": "0.00001409862268672"
          },
          "schema": "ontario.base_balances.v1",
          "source": "Base RPC",
          "tokens": [
            {
              "raw": "10402131",
              "source": "default_list",
              "symbol": "USDC",
              "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "decimals": 6,
              "formatted": "10.402131"
            }
          ],
          "address": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
          "network": "eip155:8453",
          "read_at": "2026-10-25T00:46:04Z",
          "coverage": {
            "requested": 0,
            "default_list_size": 25,
            "default_list_unread": 0
          },
          "coverage_note": "Default-list tokens appear only with a nonzero balance; requested tokens always appear. Tokens outside the list and the request are not discovered. No prices or USD values.",
          "block_timestamp": "2026-10-25T00:46:03Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "queryParams"
          ],
          "properties": {
            "queryParams": {
              "type": "object",
              "required": [
                "address"
              ],
              "properties": {
                "tokens": {
                  "type": "string",
                  "description": "Optional comma-separated ERC-20 contract addresses to read as well, max 20."
                },
                "address": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Base wallet or contract address to read."
                }
              },
              "additionalProperties": false
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "example"
          ],
          "properties": {
            "example": {
              "type": "object",
              "additionalProperties": true
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 01:14Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-26 12:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Ontario Protocol and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Ontario%20Protocol'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://ontarioprotocol.com/api/x402/base/balances, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.