Opnir Reikningar — Government Invoice Data

Overview

opnirreikningar.is publishes paid invoices from Icelandic government agencies (ministries, directorates). No auth required.

Scope: Paid invoices with org, vendor, amount, date, invoice number. Monthly updates (~10th of following month). Coverage: 2017–present.

Excludes: Salaries, foreign currency transactions, benefits, healthcare provider payments, prisoner payments, security operations. No municipality data — central government only.

API Endpoints

Base URL: https://opnirreikningar.is

1. Invoice Search (DataTables pagination)

GET /data_pagination_search?vendor_id=&type_id=&org_id=14412&timabil_fra=01.01.2025&timabil_til=31.01.2025&draw=1&columns[0][data]=org_name&columns[1][data]=check_date&columns[2][data]=vendor_name&columns[3][data]=invoice_amount&columns[4][data]=check_amount&start=0&length=500&order[0][column]=1&order[0][dir]=desc

Required headers: X-Requested-With: XMLHttpRequest, Accept: application/json

Optional: org_text=<id> - <name> (URL-encoded) when filtering by org

Key: Only abbreviated column spec needed (columns[N][data]=<name>) — full DataTables sub-params are not required. The draw, order, and 5-column layout are required.

Response:

{
  "draw": 1,
  "data": [
    {
      "org_name": "Veðurstofa Íslands",
      "check_date": "2025-01-31",
      "check_amount": 507706,
      "vendor_name": "Síminn hf.",
      "invoice_num": "12345",
      "invoice_date": "2025-01-15",
      "invoice_description": "",
      "invoice_amount": 507706,
      "check_id": 18048834,
      "invoice_id": 22050869,
      "unique_id": "18048834_22050869",
      "attachments": 0
    }
  ]
}

Pagination: No recordsTotal — paginate with start param (increment by length) until data: [].

Date params: DD.MM.YYYY (input), but response dates are ISO YYYY-MM-DD. Amounts are integers (ISK).

2. Autocomplete

# Organizations
curl 'https://opnirreikningar.is/rest/org?term=veg'
# → {"data": [{"id": "10211", "text": "Vegagerðin, rekstur"}]}

# Vendors (id = kennitala)
curl 'https://opnirreikningar.is/rest/vendor?term=Síminn'
# → {"data": [{"id": "4602070880", "text": "Síminn hf."}]}

# Expense types
curl 'https://opnirreikningar.is/rest/type?term=ferð'
# → {"data": [{"id": "...", "text": "... - Ferðakostnaður"}]}

3. Date Range

curl 'https://opnirreikningar.is/rest/max_time_period'
# → "2025-11-30" (plain text, last available month)

4. Invoice Line Items

GET /data_pagination_line?invoice_id=<id>&start=0&length=10&...columns...

Returns type_text, line_description, line_amount. May require session cookie — lower priority.

Response Fields

Field	Type	Description
org_name	string	Government agency name
check_date	string	Payment date (YYYY-MM-DD)
check_amount	int	Payment amount in ISK
vendor_name	string	Vendor/supplier name
invoice_num	string	Invoice number
invoice_date	string	Invoice date (YYYY-MM-DD)
invoice_description	string	Free-text description
invoice_amount	int	Invoice amount in ISK
check_id	int	Internal payment ID
invoice_id	int	Internal invoice ID
unique_id	string	Unique row ID (check_id_invoice_id)
attachments	int	Attachment count (usually 0)

Key Organizations

Org ID	Name
10211	Vegagerðin, rekstur (Road Administration)
14400	Landspítali (National Hospital)
14418	Ríkiskaup (State Procurement)
14412	Veðurstofa Íslands (Met Office)
14401	Háskóli Íslands (University of Iceland)

Use search-org subcommand to look up IDs.

CLI Usage

# Lookup org ID
uv run python scripts/opnirreikningar.py search-org "veg"

# Lookup vendor kennitala
uv run python scripts/opnirreikningar.py search-vendor "siminn"

# Fetch invoices to CSV
uv run python scripts/opnirreikningar.py fetch --org 14412 --from 2025-01-01 --to 2025-01-31 -o data/processed/vedurstofa_jan2025.csv

# Top vendors for an org in a year
uv run python scripts/opnirreikningar.py top-vendors --org 14412 --year 2024

Caveats

• 51-row first-page cap — the server silently truncates the first page to ~51 rows regardless of length. Use length=50 and paginate with start to get all results. Dedup by unique_id.
• No recordsTotal — must paginate until empty response
• Full dump requires iterating all orgs — without org_id or vendor_id, pagination may not work. Must enumerate orgs via autocomplete, then paginate each.
• Date params — API accepts DD.MM.YYYY for timabil_fra/timabil_til, but returns ISO dates and integer amounts
• Vendor search is accent-sensitive — use Síminn not siminn
• Monthly lag — data appears ~10th of following month. Use /rest/max_time_period to check latest available date (returns YYYY-MM-DD). As of 2026-02-21, latest data is 2026-01-30.
• Central government only — no municipalities, no SOEs
• Amounts — integers in ISK (no decimals)

Related Skills

• skatturinn — look up vendor kennitala → company info, annual reports
• tenders — cross-reference procurement contracts with actual payments