Pull your BtoBプラットフォーム 請求書 invoices into your systems

What you can build on BtoBプラットフォーム 請求書

• Get received invoices

  Build this

  Reads すべての請求書 (all invoices) under 受取TOP (receiving home) for a 受取日 (received date) range, with each invoice's sender, amount and status.

  Takes

  Received from, received to, status (optional)

  Returns

  Supplier, received date, request date, invoice amount, status

• List unprocessed invoices

  Build this

  Reads the invoices behind 未処理が〇件あります (unprocessed) under あなたの業務 on 受取TOP, the ones still waiting for you to process them.

  Takes

  Request date from (optional)

  Returns

  Supplier, request date, invoice amount

• Check issued invoices

  Build this

  Reads the 発行済 (issued) tab of 発行済一覧 (issued list) under 発行TOP: which invoices went to which customer, and for how much.

  Takes

  Customer (optional)

  Returns

  Customer, issue date, invoice amount, status

• Create and issue an invoice

  Build this

  Creates an invoice for one of your customers in 発行TOP, fills in the lines and issues it.

  Takes

  Customer, invoice date, lines with item, quantity, unit price and tax rate

  Returns

  Customer, invoice date, invoice amount, status

Automate BtoBプラットフォーム 請求書 with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• 未処理 invoices, every morning

  Build this

  Starts

  Every weekday at 8:00

  Step 1

  List the unprocessed invoices behind 未処理が〇件あります on 受取TOP.

  Step 2

  Stop when there are none.

  Step 3

  Email you the list grouped by supplier, with request date and invoice amount.

• Last month's received invoices, handed to accounting

  Build this

  Starts

  Monthly on the 1st at 9:00

  Step 1

  Get the received invoices with a 受取日 in the previous month from すべての請求書.

  Step 2

  Group them by supplier and add up the amounts.

  Step 3

  Post each invoice to your accounting system's webhook and email you the total per supplier.

• Newly issued invoices, posted to your sales system

  Build this

  Starts

  Every weekday at 18:00

  Step 1

  Check the 発行済 tab of 発行済一覧 under 発行TOP.

  Step 2

  Keep the invoices that were not there on the last run.

  Step 3

  Post customer, issue date and invoice amount to your sales system's webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get received invoices” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "www.infomart.co.jp/get_received_invoices",
    "input": {
      "received_from": "2026-10-01",
      "received_to": "2026-10-31"
    }
  }'

{
  "status": "completed",
  "data": {
    "invoices": [
      {
        "supplier": "Acme Foods K.K.",
        "received_date": "2026-10-31",
        "request_date": "2026-10-31",
        "invoice_amount": 482680,
        "currency": "JPY",
        "status": "未処理"
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

BtoBプラットフォーム 請求書’s own options

Infomart offers an API for issuing and receiving invoices, but only to paid members who also apply for its API option. The paid plan starts at 38,000円 a month with an initial fee from 100,000円. On the free plan, which trading partners use at no cost, you work in the browser: 100 invoices created a month, 10 bulk uploads and 10 accounting or payment data downloads.

Read on November 12, 2026: API FAQ, 価格・料金体系 (pricing), 受け取った請求書を確認・PDF印刷したい (FAQ).

Signing in to BtoBプラットフォーム 請求書

BtoBプラットフォーム signs you in with a ログインID, which is your email address, and a password. A company can turn on 2段階認証, a one-time password sent to the login ID's email, or 2要素認証, one sent to a registered mobile phone. With Fous you sign in once with your own account and the login is sealed with AES-256. 2段階認証's emailed codes are handled, and with a password alone or 2段階認証 an expired session is signed back in.

Worth knowing

The free plan counts per month

The free plan creates 100 invoices a month, runs 10 bulk uploads and allows 10 accounting or payment data downloads. It has no bulk PDF printing of received invoices.

Old invoices need a date range

すべての請求書 searches by 受取日, so older invoices appear only when you widen the dates. Seeing that list needs the 全受取請求書参照 permission.

The login ID is your email address

Changing the email address in プロフィール設定 changes the login ID too. When someone leaves, their invoices are handed over with 引継ぎ before their ID is deleted.

Long invoices and maintenance

The detail lines of an invoice with more than 1,000 lines cannot be printed as PDF. The API is unavailable during a scheduled maintenance once a month.

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