Turn e-staffing into an API

What you can build on e-staffing

• Get dispatch contracts

  Build this

  Searches 契約管理 > 契約を参照する (view contracts) by 状況 (status) and 契約期間 (contract period) and reads each matching contract.

  Takes

  Status, contract period from, contract period to

  Returns

  Client company, department, staff code, contract type, status, contract start, contract end, individual conflict date

• Check timesheet closing status

  Build this

  Reads the 勤怠管理 (attendance) screen for one month and shows, for each contract, whether 締め申請 (closing request) and 締め承認 (closing approval) are done.

  Takes

  Month, client company (optional)

  Returns

  Client company, staff code, period, closing requested, closing approved

• List invoices in the 請求リスト

  Build this

  Searches 請求管理 > 請求書を参照する (view invoices) and reads each invoice in the 請求リスト (invoice list).

  Takes

  Client company (optional), billing month

  Returns

  Client company, billing month, invoice amount, submitted or saved, submitted date

• Create a new contract request

  Build this

  Opens 契約依頼 > 新規契約依頼 (new contract request), fills in the contract and sends it to the client's 契約確認者 (contract confirmer).

  Takes

  Client company, department, staff code, contract start, contract end, billing rate, contract confirmer

  Returns

  Client company, staff code, contract period, status

Automate e-staffing 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.

• Contracts ending in the next 31 days

  Build this

  Starts

  Every Monday at 8:00 (Asia/Tokyo)

  Step 1

  Get dispatch contracts with status 確定 whose contract end falls in the next 31 days.

  Step 2

  Keep the contracts that were not in last Monday's list.

  Step 3

  Email you the list, one section per client company.

• Timesheets still waiting for 締め承認 at month end

  Build this

  Starts

  On the 3rd of each month at 9:00 (Asia/Tokyo)

  Step 1

  Check timesheet closing status for the month that just ended.

  Step 2

  Keep the contracts where 締め承認 is not done yet.

  Step 3

  Email you the list with client company, staff code and whether 締め申請 was made.

• Submitted invoices, posted to your accounting system

  Build this

  Starts

  Every weekday at 18:00 (Asia/Tokyo)

  Step 1

  List invoices in the 請求リスト for the current billing month.

  Step 2

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

  Step 3

  Post client company, billing month, amount and submitted date to your accounting 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 dispatch contracts” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "portal.e-staffing.ne.jp/get_dispatch_contracts",
    "input": {
      "status": "確定",
      "period_from": "2026-12-01",
      "period_to": "2026-12-31"
    }
  }'

{
  "status": "completed",
  "data": {
    "contracts": [
      {
        "client_company": "Acme Japan",
        "department": "経理部",
        "staff_code": "S20481",
        "contract_type": "延長",
        "status": "確定",
        "contract_start": "2026-10-01",
        "contract_end": "2026-12-31",
        "individual_conflict_date": "2027-04-01"
      }
    ],
    "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.

E-staffing’s own options

e-staffing documents no API. Its documentation describes the portal itself: contracts, timesheets and invoices on screen, with file uploads for contract and master data and downloads of contract data, invoice PDFs and audit documents. Agencies pay 1,000 yen a month per contract and staff member, before tax, with no setup fee.

Read on November 12, 2026: e-staffing service and pricing for agencies, Bulk contract correction (help centre), Feature guide (help centre).

Signing in to e-staffing

e-staffing signs you in with your password and, with two-step sign-in, an authentication code sent by email. It accepts sign-ins only from fixed global IP addresses registered with e-staffing. With Fous you sign in once through e-staffing's own sign-in with your own account: the login is sealed with AES-256, the emailed code is handled, and an expired session is signed back in.

Worth knowing

Registered fixed IP addresses only

e-staffing accepts sign-ins only from fixed global IP addresses registered with it, not from home. The application form for new agencies asks for your fixed global IP address.

The client confirms every contract

An agency enters a contract under 契約依頼 > 新規契約依頼 and names the client's 契約確認者. The contract moves on only after the client completes 契約確認.

Invoices do not wait for 締め承認

An invoice can be created without 締め承認. For a period with no attendance, the invoice links to the contract but no timesheet data flows into it.

Keep leading zeros in bulk files

For bulk contract corrections e-staffing recommends tab-delimited text, because Excel can drop leading zeros. It also suggests correcting a few contracts on screen, since bulk uploads error more easily.

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