Japan Stablecoin Payment Monitor

Name: Japan Stablecoin Payment Monitor
Price: 0.01 USDC
Availability: InStock

OpenPayは、日本円ステーブルコインJPYC・USDC対応の店舗向け決済インフラ。QR決済からモバイルオーダー・受注・電子レシート・会計、AIエージェント決済まで手数料0〜1%（時間指定の事前注文のみ3%）。売上はウォレットへ直接着金（ノンカストディ）。導入費0円・契約不要・オープンソース。

DataLiveeip155:8453Exactvia cdp

https://open-pay.jp/api/paid/usdc/stablecoin-payments

JapanStablecoinPaymentsMonitoringChange-feed

Calls · 30d

3→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 28 snapshots so far.

$0.53

Verified settled volume

54 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-09-04 07:02Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x52d4901142e2B5680027da5EB47C86CB02a3cA81

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"
      },
      "payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://open-pay.jp/api/paid/usdc/stablecoin-payments",
      "description": "Japan Stablecoin Payment Monitor: weekly change feed for stablecoin payment services in Japan — new launches, pilots, partnerships, fee changes, supported assets and chains, and closures. Each event is dated, categorized and tied to an official source URL. Pass changedSince=YYYY-MM-DD (your last run date) to fetch only new events; an empty changes list explicitly means no change. Without changedSince you get the full dated history back to late 2025.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "discoverable": true
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Accepts

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

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0x52d4…3cA81. The signed payment is good for 5 minutes.

Paid to: 0x52d4…3cA81
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 10000 smallest units

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x52d4901142e2B5680027da5EB47C86CB02a3cA81",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "changedSince": "2026-08-01"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "mode": "delta",
          "query": {
            "limit": 200,
            "changedSince": "2026-08-01"
          },
          "notice": {
            "code": "sourced-facts-only",
            "detail": "Events summarize official announcements about stablecoin payment services in Japan; verify with each sourceUrl before relying on a change.",
            "termsUrl": "https://open-pay.jp/en/terms"
          },
          "changes": [
            {
              "date": "2026-08-10",
              "diffs": [
                {
                  "field": "status",
                  "currentValue": "commercial",
                  "previousValue": null
                }
              ],
              "assets": [
                "USDC"
              ],
              "chains": [
                "base"
              ],
              "summary": "Digital Garage started commercial rollout of DG Stablecoin Payment Service (API-based merchant integration; initially USDC on Base, first offered to JCB and DGFT).",
              "provider": "DG Stablecoin Payment Service",
              "sourceUrl": "https://www.garage.co.jp/pr/release/20260810/",
              "summaryJa": "デジタルガレージが DG Stablecoin Payment Service の商用展開を開始 (API 接続の加盟店向け・当初は Base 上の USDC・JCB/DGFT へ先行提供)。",
              "changeType": "added",
              "changeCategory": "service_launch"
            }
          ],
          "hasMore": false,
          "providers": [
            {
              "slug": "dg-sps",
              "stage": "commercial",
              "assets": [
                "USDC"
              ],
              "chains": [
                "base"
              ],
              "region": "Japan",
              "provider": "DG Stablecoin Payment Service",
              "sourceUrl": "https://www.garage.co.jp/pr/release/20260810/",
              "startedAt": "2026-08-10",
              "verifiedAt": "2026-08-27",
              "announcedAt": "2026-08-10",
              "merchantFee": null,
              "integrations": [
                "api"
              ],
              "lastEventDate": "2026-08-10",
              "plannedPeriod": null,
              "posIntegration": null,
              "settlementCurrency": null
            }
          ],
          "generatedAt": "2026-08-27T02:00:00.000Z",
          "totalEvents": 7,
          "licenseNotice": "Events summarize what official sources state; they are not availability guarantees or endorsements. Source rights remain with their owners.",
          "schemaVersion": "1.0",
          "totalProviders": 7,
          "nextChangedSince": "2026-08-27"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "limit": {
                  "type": "string",
                  "description": "1-200 (default 200). In delta mode the limit is rounded up to a date boundary: a single day is never split, so a day holding more events is returned whole. Continue with nextChangedSince while hasMore is true."
                },
                "changedSince": {
                  "type": "string",
                  "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
                  "description": "Return only events on/after this date (YYYY-MM-DD). Set to your last run date. Omit for the full history."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-09-04 07:02Z
Last indexed by Roundhouse: 2026-09-24 14:50Z
Last enriched (probe, favicon, geo): 2026-09-13 19:15Z
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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 28 snapshots so far. 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 Japan Stablecoin Payment Monitor 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=Japan%20Stablecoin%20Payment%20Monitor'
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://open-pay.jp/api/paid/usdc/stablecoin-payments, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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