rdeknijf/nimh
.claude/skills/nimh/SKILL.md
Search NIMH (Nederlands Instituut voor Militaire Historie) records for Dutch military personnel. 178,897 records accessible via OpenArchieven API (archive_code=nim): Stamboeken (141K), Persoonskaarten (64K), Persoonsdossiers (26K), Krijgsgevangenedossiers/POW files (22K), Koninklijke Besluiten/decorations (16K), Flying Personnel (900). Coverage ~1700-1929. Also documents the formal request process for post-1920 military records. Use this skill when: "search NIMH", "military history", "navy records", "marine records", "stamboek", "krijgsgevangene", "POW records", "military decoration", "/nimh", or when looking for Dutch military service records. Also use for KNIL-adjacent searches (note: KNIL pension records are at SAIP, not NIMH). No login required for online records.
$ install --global
skillsauthnpx skillsauth add rdeknijf/ai-genealogy-kit nimhInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 17, 2026, 2:32 AM22.4s1 file scanned
SKILL.md
- name:
- nimh
- description:
- |
- (archive_code=nim):
- Stamboeken (141K), Persoonskaarten (64K), Persoonsdossiers
- request process for post-1920 military records. Use this skill when:
- search
- (note:
- KNIL pension records are at SAIP, not NIMH). No login required for
NIMH — Nederlands Instituut voor Militaire Historie
Search Dutch military personnel records from the Netherlands Institute for Military History. Part of the Ministry of Defence.
Online records: OpenArchieven API
NIMH's indexed records are in OpenArchieven under archive code nim.
curl -s "https://api.openarchieven.nl/1.1/records/search.json?name=SURNAME&archive_code=nim&lang=nl&number_show=25"
Record types available
| Source type | Records | Description | |-------------|---------|-------------| | Stamboeken | 141,348 | Regimental service records (1700-1929) | | Persoonskaarten | 64,758 | Personnel cards | | Persoonsdossiers | 26,457 | Personal files | | Krijgsgevangenedossier | 22,579 | WWII POW files | | Koninklijk Besluit | 16,251 | Royal decrees (decorations) | | Database Vliegend Personeel | 901 | Flying personnel |
Parameters
| Parameter | Description | Example |
|-----------|-------------|---------|
| name | Surname (required) | Brouwer |
| archive_code | Must be nim | nim |
| sourcetype | Filter by record type | Stamboeken, Krijgsgevangenedossier |
| number_show | Results per page (max 100) | 25 |
| start | Pagination offset | 0, 25 |
Example searches
# All NIMH records for "Brouwer"
curl -s "https://api.openarchieven.nl/1.1/records/search.json?name=Brouwer&archive_code=nim&lang=nl&number_show=25"
# Only Stamboeken (military service books)
curl -s "https://api.openarchieven.nl/1.1/records/search.json?name=Brouwer&archive_code=nim&sourcetype=Stamboeken&lang=nl&number_show=25"
# POW records
curl -s "https://api.openarchieven.nl/1.1/records/search.json?name=Brouwer&archive_code=nim&sourcetype=Krijgsgevangenedossier&lang=nl&number_show=25"
# Military decorations
curl -s "https://api.openarchieven.nl/1.1/records/search.json?name=Brouwer&archive_code=nim&sourcetype=Koninklijk+Besluit&lang=nl&number_show=25"
Response fields
Same as other OpenArchieven searches:
personname,relationtype,eventtype,eventdate,eventplacesourcetype,archive_code,identifier,url
Record detail: https://api.openarchieven.nl/1.1/records/show.json?archive=nim&identifier=UUID&lang=nl
Browser view: https://www.openarchieven.nl/nim:UUID
Archieven.nl sub-databases (browser-based)
These have more detailed search forms than the OpenArchieven API:
| Database | URL | Records |
|----------|-----|---------|
| Napoleon army | archieven.nl search with miadt=2231 | 53,000 |
| Merchant Marine WWII | archieven.nl search with miadt=2231 | 65,000 |
| Dapperheidsonderscheidingen | archieven.nl search with miadt=2231 | 1815-1963 |
| Women's Auxiliary Corps | archieven.nl search with miadt=2231 | WWII |
These overlap with the OpenArchieven data but offer different filters (role, date range). Use as a fallback if API search is insufficient.
Post-1920 records (formal request)
Personnel records for people born after 1920 are NOT in any online database. They must be requested from the Ministry of Defence:
URL: https://www.defensie.nl/onderwerpen/archief/persoonsarchief
What you get:
- Staat van Dienst (career overview: postings, ranks, training, deployments)
- Personeelsdossier (supporting documents)
Process:
- Available for deceased persons
- Free of charge
- Submit request online or by mail
- Response time: 1-3 months
KNIL note
NIMH has some KNIL-adjacent records (stamboeken with colonial postings),
but dedicated KNIL pension and service records are at SAIP (Stichting
Administratie Indonesische Pensioenen) — saip.nl. SAIP has no skill yet.
Limitations
- Online records cap around 1929 for most collections
- Only ~10% of records have indexed dates
- Marine pre-1870 records partially lost
- Most physical records require a visit to The Hague
Output format
## NIMH Result
**Person:** [name]
**Record type:** [sourcetype]
**Event:** [type], [date] in [place]
**Archive reference:** NIMH via OpenArchieven
**Record URL:** https://www.openarchieven.nl/nim:[identifier]
**Confidence:** Tier B — official military archive record via NIMH index
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