open-pay.jp

https://open-pay.jp/api/paid/usdc/jpyc/balance

Shares a payout wallet with 13 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

Read the current on-chain JPYC balance of any EVM address on one or all supported chains (Polygon, Kaia, Avalanche, Ethereum), with the token contract and the block number observed at request time. Use before or after a payment, for treasury checks, wallet monitoring, and payment reconciliation. The result does not prove wallet ownership and is not a transaction-finality certificate.

61
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Sep 6Sep 16Sep 25Oct 5

Response time

p50 74ms · p95 181ms
0ms 50ms 100ms Sep 6Sep 16Sep 25Oct 5
Data table
Reliability history per time bucket over the last 30 days (daily).
Bucket Uptime Probes Response time
9/6/2026, 12:00:00 AM 100% 17 64ms
9/7/2026, 12:00:00 AM 100% 15 64ms
9/8/2026, 12:00:00 AM 100% 21 67ms
9/9/2026, 12:00:00 AM 100% 20 63ms
9/10/2026, 12:00:00 AM 100% 14 66ms
9/11/2026, 12:00:00 AM 100% 10 72ms
9/12/2026, 12:00:00 AM 100% 9 64ms
9/13/2026, 12:00:00 AM 100% 16 64ms
9/14/2026, 12:00:00 AM 100% 15 70ms
9/15/2026, 12:00:00 AM 100% 16 70ms
9/16/2026, 12:00:00 AM 100% 16 66ms
9/17/2026, 12:00:00 AM 100% 15 70ms
9/18/2026, 12:00:00 AM 100% 13 73ms
9/19/2026, 12:00:00 AM 100% 13 67ms
9/20/2026, 12:00:00 AM 100% 12 61ms
9/21/2026, 12:00:00 AM 100% 12 68ms
9/22/2026, 12:00:00 AM 100% 12 68ms
9/23/2026, 12:00:00 AM 100% 12 64ms
9/24/2026, 12:00:00 AM 100% 14 86ms
9/25/2026, 12:00:00 AM 100% 13 73ms
9/26/2026, 12:00:00 AM 100% 14 67ms
9/27/2026, 12:00:00 AM 100% 13 84ms
9/28/2026, 12:00:00 AM 100% 13 85ms
9/29/2026, 12:00:00 AM 100% 12 90ms
9/30/2026, 12:00:00 AM 100% 11 73ms
10/1/2026, 12:00:00 AM 100% 12 70ms
10/2/2026, 12:00:00 AM 100% 12 84ms
10/3/2026, 12:00:00 AM 100% 12 68ms
10/4/2026, 12:00:00 AM 100% 10 76ms
10/5/2026, 12:00:00 AM 100% 7 65ms
61
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
61

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
2

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
USDC
Networks
base
Facilitator
unknown
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
—
Domain registered
—
Hosting network
CLOUDFLARENET
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

On-chain activity (base)

20
payments (30d)
0.15
USD volume (30d)
7
paying wallets (30d)

Payments per day

last payment 10/5/2026
0 3 5 Sep 8Sep 27Sep 30Oct 5
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
9/8/2026 2 0.02 2
9/12/2026 1 0 1
9/14/2026 2 0.01 1
9/17/2026 1 0 1
9/27/2026 1 0.01 1
9/28/2026 4 0.03 2
9/29/2026 2 0.02 1
9/30/2026 1 0.01 1
10/2/2026 1 0.01 1
10/3/2026 1 0.01 1
10/4/2026 2 0.01 1
10/5/2026 2 0.02 1

This payout wallet is shared: figures cover all 14 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://open-pay.jp/api/paid/hello x402 endpoint https://open-pay.jp/api/paid/usdc/stablecoin-payments x402 endpoint https://aegis-ai.xyz/api/d2a/briefing-jpyc x402 endpoint https://aegis-ai.xyz/api/d2a/briefing x402 endpoint https://open-pay.jp/api/paid/usdc/jpyc/activity x402 endpoint https://open-pay.jp/api/paid/usdc/jpyc/services x402 endpoint https://open-pay.jp/api/paid/usdc/jpyc/transfers x402 endpoint https://open-pay.jp/api/paid/usdc/jpyc/supply x402 endpoint
Response schema 
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "properties": {
    "address": {
      "pattern": "^0x[a-fA-F0-9]{40}$",
      "type": "string"
    },
    "generatedAt": {
      "format": "date-time",
      "type": "string"
    },
    "items": {
      "items": {
        "oneOf": [
          {
            "additionalProperties": false,
            "properties": {
              "balance": {
                "description": "Atomic JPYC amount with 18 decimals.",
                "pattern": "^[0-9]+$",
                "type": "string"
              },
              "balanceFormatted": {
                "pattern": "^[0-9]+(\\.[0-9]+)?$",
                "type": "string"
              },
              "blockNumber": {
                "pattern": "^[0-9]+$",
                "type": "string"
              },
              "chain": {
                "enum": [
                  "polygon",
                  "kaia",
                  "avalanche",
                  "ethereum"
                ],
                "type": "string"
              },
              "chainId": {
                "minimum": 1,
                "type": "integer"
              },
              "contract": {
                "pattern": "^0x[a-fA-F0-9]{40}$",
                "type": "string"
              },
              "status": {
                "const": "ok",
                "type": "string"
              }
            },
            "required": [
              "chain",
              "chainId",
              "contract",
              "status",
              "blockNumber",
              "balance",
              "balanceFormatted"
            ],
            "type": "object"
          },
          {
            "additionalProperties": false,
            "properties": {
              "chain": {
                "enum": [
                  "polygon",
                  "kaia",
                  "avalanche",
                  "ethereum"
                ],
                "type": "string"
              },
              "chainId": {
                "minimum": 1,
                "type": "integer"
              },
              "contract": {
                "pattern": "^0x[a-fA-F0-9]{40}$",
                "type": "string"
              },
              "errorCode": {
                "enum": [
                  "rpc_unavailable",
                  "contract_read_failed"
                ],
                "type": "string"
              },
              "retryable": {
                "type": "boolean"
              },
              "status": {
                "const": "unavailable",
                "type": "string"
              }
            },
            "required": [
              "chain",
              "chainId",
              "contract",
              "status",
              "errorCode",
              "retryable"
            ],
            "type": "object"
          }
        ]
      },
      "type": "array"
    },
    "notice": {
      "const": "onchain-facts-only",
      "description": "On-chain facts read from public RPC endpoints at request time. Informational only — not financial advice, not an offer, quote or solicitation. Full terms at termsUrl.",
      "type": "string"
    },
    "schemaVersion": {
      "const": "2.2",
      "type": "string"
    },
    "termsUrl": {
      "format": "uri",
      "type": "string"
    },
    "token": {
      "additionalProperties": false,
      "properties": {
        "decimals": {
          "const": 18,
          "type": "integer"
        },
        "symbol": {
          "const": "JPYC",
          "type": "string"
        }
      },
      "required": [
        "symbol",
        "decimals"
      ],
      "type": "object"
    }
  },
  "required": [
    "schemaVersion",
    "token",
    "generatedAt",
    "notice",
    "termsUrl",
    "address",
    "items"
  ],
  "type": "object"
}