accounted/skills/accounted-api/references/core.md

Core endpoints

Connectivity, company discovery, async-operation polling, and company settings. Every session starts with GET /companies to resolve the companyId that all other URLs need.

Conventions (auth, envelope, pagination, dry-run, idempotency, standard errors) are in SKILL.md and are not repeated per endpoint.

GET /api/v1/companies

List companies the API key can access. scope:companies:read · risk:low · idempotent

Returns every non-archived company the API key user is a member of, together with their role. Use the returned id as {companyId} in subsequent endpoints.

Use when: You need to discover which company IDs an API key has access to before calling company-scoped endpoints. Do not use for: Fetching a single company you already know the id of: use GET /api/v1/companies/{companyId} for that.

Pitfalls:

• Multi-company keys (e.g. consultants) will see >1 result. Always pass the correct companyId in subsequent paths.
• Archived companies are excluded; if a company disappears the user has been removed from it or it was archived.

Response 200:

{
  data: { id: string, name: string, org_number: string, entity_type: string, role: "owner" | "admin" | "member" | "viewer", created_at: string }[],
  meta: {
    request_id: string,
    api_version: string,
    next_cursor?: string,
    audit?: { voucher_number?: string, voucher_url?: string, audit_trail_url?: string, immutable_at?: string },
    partial_expansions?: string[]
  }
}

Example response 200:

{
  "data": [
    {
      "id": "8fd5b1f4-…",
      "name": "Acme AB",
      "org_number": "556677-8899",
      "entity_type": "aktiebolag",
      "role": "owner",
      "created_at": "2025-01-04T08:00:00Z"
    }
  ],
  "meta": {
    "request_id": "req_…",
    "api_version": "2026-05-12",
    "next_cursor": null
  }
}

---

POST /api/v1/companies

Create a company and set it up for bookkeeping. scope:companies:write · risk:medium · dry-run

Creates a new company owned by the API key user (or attached to one of their teams) and sets it up in one call: owner membership, BAS chart of accounts for the company form, compliance settings, the first fiscal period and the automatic tax deadlines. A 30-day trial with every paid capability starts immediately. Intended for partner platforms provisioning client companies (byrå/vertical SaaS) and for agents onboarding a user.

Use when: A platform or agent needs to provision a company that does not exist in Accounted yet. The caller becomes its owner; invite the end customer afterwards. Do not use for: Companies that already exist (list them with GET /api/v1/companies), or changing settings on an existing company (PATCH /api/v1/companies/{companyId}/settings).

Pitfalls:

• A VAT-registered company MUST send moms_period (monthly / quarterly / yearly); the request is refused otherwise, because a missing period silently produces zero VAT deadlines.
• Bookkeeping duty under BFL starts when the company exists with a fiscal period: do not create companies to try things out. Use a test-mode key (dry run) for that.
• Enskild firma always runs on the calendar year; fiscal_year_start_month is ignored for it.
• first_fiscal_year is only for a company in its first year (BFL 3 kap.: up to 18 months). Omit it for an established company.
• Not idempotent, and Idempotency-Key is not honoured on this company-less route: a retry after a network failure creates a second company. List GET /api/v1/companies before retrying.
• org_number is required for a VAT-registered company (the invoice momsregistreringsnummer derives from it), and f_skatt must be stated explicitly: F-skatt approval is never assumed.
• accounting_method may be omitted: it then defaults by form (aktiebolag accrual, enskild firma cash) and the response shows the resolved value. The cash default is only legal when turnover normally stays under 3 MSEK (BFL 4 kap 4 §): send accrual explicitly for a larger enskild firma.

Request body:

{
  name: string,
  entity_type: "enskild_firma" | "aktiebolag",
  org_number?: string,
  vat_registered: boolean,
  moms_period?: "monthly" | "quarterly" | "yearly",
  accounting_method?: "accrual" | "cash",
  f_skatt: boolean,
  fiscal_year_start_month?: number,
  first_fiscal_year?: { start: string, end: string },
  address_line1?: string,
  postal_code?: string,
  city?: string,
  team_id?: string
}

Example request:

{
  "name": "Acme AB",
  "entity_type": "aktiebolag",
  "org_number": "5566778899",
  "vat_registered": true,
  "moms_period": "quarterly",
  "accounting_method": "accrual",
  "f_skatt": true
}

Response 200:

{
  data: {
    id: string,
    name: string,
    entity_type: "enskild_firma" | "aktiebolag",
    org_number: string,
    vat_registered: boolean,
    moms_period: "monthly" | "quarterly" | "yearly",
    accounting_method: "accrual" | "cash",
    fiscal_period: { start_date: string, end_date: string, name: string },
    team_id: string
  },
  meta: {
    request_id: string,
    api_version: string,
    next_cursor?: string,
    audit?: { voucher_number?: string, voucher_url?: string, audit_trail_url?: string, immutable_at?: string },
    partial_expansions?: string[]
  }
}

Example response 200:

{
  "data": {
    "id": "8fd5b1f4-…",
    "name": "Acme AB",
    "entity_type": "aktiebolag",
    "org_number": "5566778899",
    "vat_registered": true,
    "moms_period": "quarterly",
    "accounting_method": "accrual",
    "fiscal_period": {
      "start_date": "2026-01-01",
      "end_date": "2026-12-31",
      "name": "Räkenskapsår 2026"
    },
    "team_id": null
  },
  "meta": {
    "request_id": "req_…",
    "api_version": "2026-05-12"
  }
}

---

PATCH /api/v1/companies/{companyId}/settings

Partially update company settings. scope:companies:write · risk:medium · idempotent · dry-run · reversible

Patches the company payment details (bank account, Bankgiro, Plusgiro, Swish, IBAN/BIC), the contact details shown on invoices (contact_person, email, phone, website), and the custom invoice email texts. All fields optional; at least one must be supplied. Idempotent (mandatory Idempotency-Key). Dry-runnable. The same validation as the MCP staging tool applies: Bankgiro/Plusgiro numbers are Luhn-checked and invoice email texts only accept a fixed placeholder set.

Use when: You need to change the payment or contact details that appear on invoices, or override the invoice email texts, directly over REST instead of the staged MCP flow. Do not use for: Legal or tax profile changes (org number, VAT registration, fiscal year, accounting method): those are not exposed on the public API. Reading settings (no GET endpoint yet; use the MCP tool gnubok_get_company_settings).

Pitfalls:

• Idempotency-Key is mandatory; calls without it return 400.
• contact_person is stored as default_our_reference: the default "Our reference" value on new invoices.
• bankgiro and plusgiro must carry a valid Luhn check digit; null or empty string clears them.
• invoice_email_texts only accepts the placeholders {fakturanummer} {kundnamn} {förnamn} {företag} {förfallodatum} {belopp}; any other {token} is rejected. Null clears every override.

Parameter	In	Type	Required	Notes
companyId	path	string	yes

Request body:

{
  bank_name?: string,
  clearing_number?: string | "",
  account_number?: string | "",
  bankgiro?: string | "",
  plusgiro?: string | "",
  swish?: string,
  iban?: string | "",
  bic?: string | "",
  contact_person?: string,
  email?: string | "",
  phone?: string,
  website?: string | "",
  invoice_email_texts?: {
    sv?: { subject?: string, greeting?: string, body?: string, signoff?: string },
    en?: { subject?: string, greeting?: string, body?: string, signoff?: string }
  }
}

Example request:

{
  "bankgiro": "991-2346",
  "contact_person": "Anna Andersson"
}

Response 200:

{
  data: {
    company_id: string,
    bank_name: string,
    clearing_number: string,
    account_number: string,
    bankgiro: string,
    plusgiro: string,
    swish: string,
    iban: string,
    bic: string,
    contact_person: string,
    email: string,
    phone: string,
    website: string,
    invoice_email_texts: { sv?: { subject?: string, greeting?: string, body?: string, signoff?: string }, en?: { subject?: string, greeting?: string, body?: string, signoff?: string } }
  },
  meta: {
    request_id: string,
    api_version: string,
    next_cursor?: string,
    audit?: { voucher_number?: string, voucher_url?: string, audit_trail_url?: string, immutable_at?: string },
    partial_expansions?: string[]
  }
}

Example response 200:

{
  "data": {
    "company_id": "aaaa1111-2222-4333-8444-555566667777",
    "bank_name": "Testbanken",
    "clearing_number": null,
    "account_number": null,
    "bankgiro": "991-2346",
    "plusgiro": null,
    "swish": null,
    "iban": null,
    "bic": null,
    "contact_person": "Anna Andersson",
    "email": "faktura@acme.example",
    "phone": null,
    "website": null,
    "invoice_email_texts": null
  },
  "meta": {
    "request_id": "req_...",
    "api_version": "2026-05-12"
  }
}

---

GET /api/v1/health

Health check. risk:low · idempotent

Reports the API is reachable and what version is currently served. Public; no auth required.

Use when: You want to verify connectivity, latency, or which API version is live before issuing other requests. Do not use for: Anything that needs authenticated data. This endpoint returns no company-specific information.

Pitfalls:

• A 200 here only means the API process responds: downstream Postgres/Supabase may still be degraded.

Response 200:

{
  data: { status: "ok" | "degraded", service: "gnubok", api_version: string, timestamp: string },
  meta: {
    request_id: string,
    api_version: string,
    next_cursor?: string,
    audit?: { voucher_number?: string, voucher_url?: string, audit_trail_url?: string, immutable_at?: string },
    partial_expansions?: string[]
  }
}

Example response 200:

{
  "data": {
    "status": "ok",
    "service": "gnubok",
    "api_version": "2026-05-12",
    "timestamp": "2026-05-12T16:25:06Z"
  },
  "meta": {
    "request_id": "req_…",
    "api_version": "2026-05-12"
  }
}

---

GET /api/v1/operations/{id}

Poll a long-running operation by id. scope:operations:read · risk:low · idempotent

Returns the current snapshot of a v1 async operation: status (queued / running / succeeded / failed / cancelled), progress (jsonb, free-form), result (on success), and error (on failure). The operation_id is returned by the POST endpoints that initiate async work (period close, year-end, currency revaluation, SIE import).

Use when: You started an async operation and need to know whether it has finished. Poll every 5-30 seconds until a terminal status. (The 202 response advertises operation.completed as the eventual push signal, but that webhook event is not deliverable yet — polling is the only supported completion signal today.) Do not use for: Fetching the resource the operation produced: once status=succeeded, read the result field or call the resource-specific GET endpoint. Cancelling a running operation (no cancel endpoint exists in v1).

Pitfalls:

• Terminal statuses (succeeded, failed, cancelled) are final; the row never transitions out of them.
• progress is free-form jsonb; agents should treat it as opaque except for the documented fields phase (string), current / total (numbers for percent calculation).
• started_at is null while status=queued (the work has not begun yet); completed_at is null until a terminal status is reached.

Parameter	In	Type	Required	Notes
id	path	string	yes

Response 200:

{
  data: {
    operation_id: string,
    type: string,
    status: "queued" | "running" | "succeeded" | "failed" | "cancelled",
    progress?: Record<string, unknown>,
    result?: unknown,
    error: { code?: string, message?: string, details?: unknown },
    started_at: string,
    completed_at: string,
    poll_url: string,
    webhook_event: "operation.completed"
  },
  meta: {
    request_id: string,
    api_version: string,
    next_cursor?: string,
    audit?: { voucher_number?: string, voucher_url?: string, audit_trail_url?: string, immutable_at?: string },
    partial_expansions?: string[]
  }
}

Example response 200:

{
  "data": {
    "operation_id": "0e9c-…",
    "type": "fiscal_periods.year_end",
    "status": "succeeded",
    "progress": {
      "phase": "committed",
      "current": 142,
      "total": 142
    },
    "result": {
      "journal_entries_created": 4,
      "opening_balances_set": 138
    },
    "error": null,
    "started_at": "2026-05-12T10:01:23Z",
    "completed_at": "2026-05-12T10:01:48Z",
    "poll_url": "/api/v1/operations/0e9c-…",
    "webhook_event": "operation.completed"
  },
  "meta": {
    "request_id": "req_…",
    "api_version": "2026-05-12"
  }
}