SweKit - Swedish validators

by swekit-api.zenith-ops.workers.dev · remote · no sign-in to list tools · v0.1.0 · published by dev.workers.zenith-ops.swekit-api

Swedish personnummer/orgnr/bankgiro/OCR validation, kontonummer to IBAN, bankdagar.

Changes · 3

Compare Registry entry

13 tools: 3 change things and 10 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things3Claude Code: ask: see these tools
Only reads10Claude Code: allow: see these tools

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http swekit https://swekit-api.zenith-ops.workers.dev/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn

Warngenerate_ocr
The server marks "generate_ocr" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "generate_ocr" says "generate": a word for a change.
What this check looks for
Warnadd_business_days
The server marks "add_business_days" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "add_business_days" says "add": a word for a change.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

13 tools

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

add_business_daysAdd (or subtract) business days to a date using Swedish holidays (e.g.1 finding
Why it is in this group
- The name "add_business_days" says "add": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "add_business_days" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "add_business_days" says "add": a word for a change.
  What this check looks for
Description, as the server wrote it
Add (or subtract) business days to a date using Swedish holidays (e.g. payment due dates).
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
generate_ocrGenerate a Swedish OCR reference (check digit, optional length digit) from a base number such as an invoice number.1 finding
Why it is in this group
- The name "generate_ocr" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "generate_ocr" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "generate_ocr" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Generate a Swedish OCR reference (check digit, optional length digit) from a base number such as an invoice number.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
swedish_date_infoWeekday (sv/en), ISO week, holiday names and business-day status for a date.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Weekday (sv/en), ISO week, holiday names and business-day status for a date. mode=bank treats midsommarafton, julafton and nyårsafton as non-business days.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false

Only reads 10Looks things up and changes nothing.Claude Code: allow

count_business_daysCount Swedish business days after "from" up to and including "to".No findings
Why it is in this group
- The name "count_business_days" says "count": a word for reading.
Description, as the server wrote it
Count Swedish business days after "from" up to and including "to".
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
lookup_clearing_numberLook up bank name, BIC, IBAN id and account type for a Swedish clearing number.No findings
Why it is in this group
- The name "lookup_clearing_number" says "lookup": a word for reading.
Description, as the server wrote it
Look up bank name, BIC, IBAN id and account type for a Swedish clearing number.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
swedish_account_to_ibanValidate a Swedish national bank account (clearing + account number, Bankgirot checksum rules) and convert it to IBAN using the official Bankinfrastruktur clearing table.No findings
Why it is in this group
- The description's first verb is "validate": a word for reading.
Description, as the server wrote it
Validate a Swedish national bank account (clearing + account number, Bankgirot checksum rules) and convert it to IBAN using the official Bankinfrastruktur clearing table. Returns bank, BIC, account type, IBAN.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
swedish_holidaysList Swedish public holidays, eves and observances for a year (computed).No findings
Why it is in this group
- The description's first verb is "list": a word for reading.
Description, as the server wrote it
List Swedish public holidays, eves and observances for a year (computed).
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_bankgiroValidate and format a Swedish bankgiro number.No findings
Why it is in this group
- The name "validate_bankgiro" says "validate": a word for reading.
Description, as the server wrote it
Validate and format a Swedish bankgiro number.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_ibanValidate any IBAN (ISO 13616 mod-97 + country length) and identify the bank for Swedish IBANs.No findings
Why it is in this group
- The name "validate_iban" says "validate": a word for reading.
Description, as the server wrote it
Validate any IBAN (ISO 13616 mod-97 + country length) and identify the bank for Swedish IBANs.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_ocrValidate a Swedish OCR payment reference (Luhn check digit, optional length digit).No findings
Why it is in this group
- The name "validate_ocr" says "validate": a word for reading.
Description, as the server wrote it
Validate a Swedish OCR payment reference (Luhn check digit, optional length digit).
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_orgnrValidate a Swedish organisationsnummer (or SE...01 VAT number); returns legal form hint and the derived Swedish VAT number.No findings
Why it is in this group
- The name "validate_orgnr" says "validate": a word for reading.
Description, as the server wrote it
Validate a Swedish organisationsnummer (or SE...01 VAT number); returns legal form hint and the derived Swedish VAT number.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_personnummerValidate a Swedish personnummer or samordningsnummer (format, Luhn checksum, birth date, age, gender).No findings
Why it is in this group
- The name "validate_personnummer" says "validate": a word for reading.
Description, as the server wrote it
Validate a Swedish personnummer or samordningsnummer (format, Luhn checksum, birth date, age, gender). Checks format only; does not prove the person exists.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false
validate_plusgiroValidate and format a Swedish plusgiro number.No findings
Why it is in this group
- The name "validate_plusgiro" says "validate": a word for reading.
Description, as the server wrote it
Validate and format a Swedish plusgiro number.
Annotations the server declares
- readOnlyHint: true
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http swekit https://swekit-api.zenith-ops.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__swekit__validate_personnummer",
      "mcp__swekit__validate_orgnr",
      "mcp__swekit__validate_bankgiro",
      "mcp__swekit__validate_plusgiro",
      "mcp__swekit__validate_ocr",
      "mcp__swekit__swedish_account_to_iban",
      "mcp__swekit__validate_iban",
      "mcp__swekit__lookup_clearing_number",
      "mcp__swekit__swedish_holidays",
      "mcp__swekit__count_business_days"
    ],
    "ask": [
      "mcp__swekit__generate_ocr",
      "mcp__swekit__swedish_date_info",
      "mcp__swekit__add_business_days"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as swekit. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/dev.workers.zenith-ops.swekit-api/swekit/changes.xml

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Anlyon alternative

3 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry. Synced Oct 21, 2026, 18:12 UTC.

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