rdeknijf/voc-opvarenden
.claude/skills/voc-opvarenden/SKILL.md
Search the VOC Opvarenden database for Dutch East India Company crew records (1699-1794). Uses the Nationaal Archief HUB3 API — 853,785 indexed entries with rich detail: name, origin, rank, ship, fate (died/returned/deserted), service dates, VOC chamber, and links to original scans. Use this skill when: "search VOC records", "VOC crew", "VOC opvarenden", "sailed to Batavia", "Dutch East India Company", "VOC soldier", "VOC sailor", "/voc-opvarenden", or when looking for ancestors who may have sailed with the VOC. Also use when checking Daniel Pieterse Knijf (1704, Woerden) or any Knijf/Knijff VOC connections. No login required.
$ install --global
skillsauthnpx skillsauth add rdeknijf/ai-genealogy-kit voc-opvarendenInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
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Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
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Scanners in report
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TrivyContainer and dependency vulnerability scanner
95%
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SemgrepStatic code analysis for vulnerabilities
95%
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mcp-scan (Snyk)Model Context Protocol security validation
95%
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Snyk (dep)Open source security scanning
50%
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Socket.devSupply chain security analysis
50%
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VirusTotalMulti-engine malware detection
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CrowdStrikeAdvanced threat intelligence
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OSV-ScannerOpen Source Vulnerability database check
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OWASP Dep-Check
50%
Last scanned: Apr 17, 2026, 2:32 AM5.0s1 file scanned
SKILL.md
- name:
- voc-opvarenden
- description:
- |
- with rich detail:
- name, origin, rank, ship, fate (died/returned/deserted),
VOC Opvarenden — Dutch East India Company Crew (1699-1794)
Search crew records of the VOC. 853,785 entries covering qualified muster rolls (gekwalificeerde monsterrollen) from 1699-1794.
Access method: Nationaal Archief HUB3 API
Pure JSON API, no browser needed. This is a different API from the
OpenArchieven/GAF endpoints in the nationaal-archief skill.
Step 1: Search by surname
curl -s "https://service.archief.nl/hub3/api/nt/nt00444?q=SURNAME" \
-H "User-Agent: Mozilla/5.0" -H "Accept: application/json"
The response contains two groups:
NT00444_Opvarenden— crew members (primary)NT00444_Begunstigden— beneficiaries (who received the sailor's pay)
Each group has rows[] with recordID (UUID) and inline fields.
Search fields in list results
| Field | Description |
|-------|-------------|
| prs_voornamen | First name |
| prs_patroniem | Patronym (e.g., Jansz) |
| prs_tussenvoegsels | Prefix (de, van der, etc.) |
| prs_achternaam | Surname |
| pla_naam_herkomst | Place of origin |
Example
# Search for Knijf (returns 13 crew + 1 beneficiary)
curl -s "https://service.archief.nl/hub3/api/nt/nt00444?q=Knijf" \
-H "User-Agent: Mozilla/5.0" -H "Accept: application/json"
# Search Knijff (different people! 33 crew + 1 beneficiary)
curl -s "https://service.archief.nl/hub3/api/nt/nt00444?q=Knijff" \
-H "User-Agent: Mozilla/5.0" -H "Accept: application/json"
Always search both Knijf and Knijff — different spelling variants
appear as different individuals in the index.
Step 2: Get record detail
curl -s "https://service.archief.nl/hub3/api/nt/nt00444/RECORD_UUID" \
-H "User-Agent: Mozilla/5.0" -H "Accept: application/json"
Detail fields
| Field name | Label | Example |
|-----------|-------|---------|
| prs_voornamen | First name | Aart |
| prs_patroniem | Patronym | Jansz |
| prs_tussenvoegsels | Prefix | van der |
| prs_achternaam | Surname | Knijff |
| pla_naam_herkomst | Origin | Delft |
| prs_datum_indiensttreding | Entry date | 1725-04-25 |
| rol_naam_functie_NL | Rank/function | Matroos |
| rol_naam_functie_uitleg_NL | Function description | (full text) |
| sch_naam_uitgevaren | Outbound ship | Spiering |
| prs_datum_uitdiensttreding | Discharge date | 1732-00-00 |
| ove_tekst_lokatie_uitdiensttreding_NL | Discharge location | Batavia |
| ove_tekst_reden_uitdiensttreding_NL | Fate | Overleden / Gerepatrieerd |
| ove_tekst_opmerking_uitdiensttreding_NL | Discharge notes | (full text) |
| sch_naam_terugreis | Return ship | NOORDWADDINXVEEN |
| ove_datum_terugreis_vertrek | Return departure | 1732-01-01 |
| ove_datum_terugreis_aankomst | Return arrival NL | 1732-09-07 |
| handle | Scan handle URL | http://hdl.handle.net/10648/... |
| vwz_archivelink | Archive reference | NL-HaNA/1.04.02/13932//100// |
Plus linked NT00444_Soldijboeken sub-record with: ship name, VOC
chamber (Amsterdam/Delft/Rotterdam/etc.), destination, departure date.
Scan URL
The handle field resolves to the NA scan viewer:
https://www.nationaalarchief.nl/onderzoeken/archief/1.04.02/invnr/{invnr}/file/NL-HaNA_1.04.02_{invnr}_{folio}
Bonus: Discovery search across all NA indexes
curl -s "https://service.archief.nl/hub3/api/nt/search?q=SURNAME" \
-H "User-Agent: Mozilla/5.0" -H "Accept: application/json"
Returns counts across 15+ NA name indexes including VOC, KNIL, Landmacht, Marine, emigration. Useful for a broad initial sweep.
Known Knijf/Knijff in VOC
- Daniel Knijf from Woerden (1704, ship Neptunus, soldaat, died Asia 1714)
- Pieter de Knijf from Utrecht and Rotterdam (multiple voyages)
- Gerrit de Knijf from Utrecht
- Aart Knijff from Delft (Matroos, 5+ voyages 1715-1732)
Limitations
- 1699-1794 only. Earlier VOC records (1602-1699) not in this index.
- No pagination. All results returned in one response.
- Dates can be partial:
1732-00-00means year only. - Different from OpenArchieven: The existing
nationaal-archiefskill (archive_code=ghn) returns zero VOC crew results. This is a separate API.
Output format
## VOC Opvarende
**Name:** [voornaam] [patroniem] [tussenvoegsels] [achternaam]
**Origin:** [herkomst]
**Rank:** [functie]
**Ship:** [outbound ship] ([chamber])
**Service:** [entry date] - [discharge date]
**Fate:** [reden uitdiensttreding] at [location]
**Return:** [return ship], arrived [date]
**Archive ref:** [archivelink]
**Scan:** [handle URL]
**Confidence:** Tier B — Nationaal Archief VOC indexed record with scan
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