# Open Archives (remote · mcp.openarchieven.nl)

MCP server for Open Archives: Dutch genealogical records and historical page transcriptions.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `mcp.openarchieven.nl`: 71/100 (this document), [markdown](https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp.md), [page](https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp)

## Channel facts

- Endpoint: `https://mcp.openarchieven.nl/`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 75/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 2287 tokens (~99/item across 23 items; 22 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 2% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### Claude

```bash
claude mcp add --transport http coret-openarchieven-mcp-server https://mcp.openarchieven.nl/
```

### Codex

```toml
[mcp_servers.coret-openarchieven-mcp-server]
url = "https://mcp.openarchieven.nl/"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "coret-openarchieven-mcp-server": {
      "type": "remote",
      "url": "https://mcp.openarchieven.nl/",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add coret-openarchieven-mcp-server --url https://mcp.openarchieven.nl/ --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  coret-openarchieven-mcp-server:
    url: "https://mcp.openarchieven.nl/"
```

### Other

```json
{
  "mcpServers": {
    "coret-openarchieven-mcp-server": {
      "type": "http",
      "url": "https://mcp.openarchieven.nl/"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 71, +2)

- [security improvement] DNSSEC: unverified → pass

### 2026-08-01 (score 69, −1)

- [security regression] DNSSEC: pass → unverified
- [functional improvement] Stability: unverified → 0.03

### 2026-07-31 (score 70)

First indexed and scored.

## MCP tools (22)

### `search_records` (~160 tokens)

Search Records

Search genealogical records

Searches the genealogical dataset and returns found persons and records. Supports filtering by archive, source type, event place, birth place, relation type and country. Results are pageable and sortable. Note: version 1.1 uses `archive_code` instead of `archive`.

Input parameters:

- `archive_code` (string)
- `birthplace` (string)
- `country_code` (string)
- `eventplace` (string)
- `lang` (string)
- `name` (string, required)
- `not_archive` (number)
- `number_show` (integer)
- `relationtype` (string)
- `sort` (number)
- `sourcetype` (string)
- `start` (integer)

### `show_record` (~117 tokens)

Show Record

Show a single genealogical record

Returns one specific genealogical record in JSON format (UTF-8). The response conforms to the Archive 2 All (A2A) model. Also available as XML, GEDCOM, Turtle (TTL) and N-Triples (NT) by changing the file extension in the URL. Note: version 1.1 features improved JSON/XML output and adds N-Triples and Turtle formats.

Input parameters:

- `archive` (string, required)
- `identifier` (string, required)
- `lang` (string)

### `match_record` (~73 tokens)

Match Record

Match a person to birth and death records

Searches the genealogical dataset by exact name and birth year and returns the Open Archives URIs of birth records, death records and registrations in which the person is mentioned.

Input parameters:

- `birthyear` (integer, required)
- `lang` (string)
- `name` (string, required)

### `get_births_years_ago` (~84 tokens)

Births N Years Ago

List births that occurred a specified number of years ago

Returns a list of birth records for people born exactly the specified number of years ago from today. Note: version 1.1 uses `archive_code` instead of `archive` and includes the archive name and record URL.

Input parameters:

- `number_show` (integer)
- `years` (integer, required)

### `get_births` (~59 tokens)

Find Births

Finds birth records

Input parameters:

- `eventplace` (string)
- `eventprovince` (string)
- `eventyear` (integer)
- `name` (string, required)
- `number_show` (integer)
- `start` (integer)

### `get_deaths` (~51 tokens)

Find Deaths

Finds death records

Input parameters:

- `eventplace` (string)
- `eventyear` (integer)
- `name` (string, required)
- `number_show` (integer)
- `start` (integer)

### `get_marriages` (~67 tokens)

Find Marriages

Finds marriage records of couples (bride or groom)

Input parameters:

- `eventplace` (string)
- `eventyear` (integer)
- `name1` (string, required)
- `name2` (string, required)
- `number_show` (integer)
- `start` (integer)

### `get_archives` (~71 tokens)

List Archives

List all archives with statistics

Returns an array of all participating archives including their archive code (used in other API calls), name, homepage URL, Twitter handle, ISIL code and search URL on Open Archives. Note: version 1.1 adds ISIL codes and removes defunct ArchiefWiki links.

### `get_record_stats` (~84 tokens)

Record Stats

Record count statistics per archive

Returns record count statistics. When no archive is specified, all archives are listed with their total number of records. When an archive code is specified, the source types available for that archive are returned with their individual record counts. Note: version 1.1 uses `archive_code` instead of `archive`.

Input parameters:

- `archive_code` (string)

### `get_source_type_stats` (~80 tokens)

Source-Type Stats

Record count statistics per source type

Returns statistics about source types. Without an archive_code all source types across the entire dataset are returned with total record counts. With an archive_code, only source types for that archive are returned. Note: version 1.1 uses `archive_code` instead of `archive`.

Input parameters:

- `archive_code` (string)

### `get_event_type_stats` (~79 tokens)

Event-Type Stats

Record count statistics per event type

Returns statistics about event types. Without an archive_code all event types across the entire dataset are returned with total counts. With an archive_code, only event types for that archive are returned. Note: version 1.1 uses `archive_code` instead of `archive`.

Input parameters:

- `archive_code` (string)

### `get_comment_stats` (~77 tokens)

Comment Stats

Comment count statistics

Returns the total number of validated comments made on records. When no archive_code is provided, the global total is returned. When an archive code is provided, the count for that archive is returned. Note: version 1.1 uses `archive_code` instead of `archive`.

Input parameters:

- `archive_code` (string)

### `get_family_name_stats` (~104 tokens)

Family-Name Stats

Family name frequency statistics

Returns the number of times family names appear in events for the selected source types, place and period. Results are ordered by frequency. Open Archives uses this endpoint to power its family name frequency visualisation.

Input parameters:

- `eventplace` (string)
- `eventtype` (number)
- `eventyearend` (integer)
- `eventyearstart` (integer)
- `lang` (string)
- `number_show` (integer)

### `get_first_name_stats` (~83 tokens)

First-Name Stats

First name frequency statistics for a given place and year

Returns the top-X list of first names in the specified place and year. When a person has multiple forenames, only the first is counted. Currently only Amsterdam is available as a place.

Input parameters:

- `eventplace` (string, required)
- `eventyear` (integer, required)
- `number_show` (integer)

### `get_profession_stats` (~90 tokens)

Profession Stats

Profession frequency statistics

Returns the number of times professions appear in records for the selected period and place. Results are ordered by frequency. Open Archives uses this endpoint to power its profession frequency visualisation.

Input parameters:

- `eventplace` (string)
- `eventyearend` (integer)
- `eventyearstart` (integer)
- `lang` (string)
- `number_show` (integer)

### `get_breakdown` (~206 tokens)

Breakdown Stats

Cross-tabulation aggregation grouped by one dimension

Returns record counts filtered by any combination of archive, source type, event type, event place and year range, grouped by ONE chosen dimension (archive, sourcetype, eventtype, place or year). Use this endpoint to answer questions such as "how many Bidprentjes per archive?" or "how many marriages per year in Amsterdam?". The response includes the total filtered record count, the total number of distinct groups (capped at 750) and the top-N groups according to the chosen sort.

Input parameters:

- `archive_code` (string)
- `eventplace` (string)
- `eventtype` (number)
- `group_by` (string, required)
- `lang` (string)
- `min_count` (integer)
- `number_show` (integer)
- `sort` (string)
- `sourcetype` (string)
- `year_end` (integer)
- `year_start` (integer)

### `get_historical_weather` (~113 tokens)

Historical Weather

Historical weather measurements for a date and location

Returns historical weather measurements from the nearest Dutch weather station for the specified date and coordinates. Data sources are the Royal Netherlands Meteorological Institute (KNMI): measurements 1701–1905 and 1901–2014. Note: this endpoint exposes several types of historical datasets, so measurement types and units can vary between records.

Input parameters:

- `date` (string, required)
- `lang` (string)
- `latitude` (number, required)
- `longitude` (number, required)

### `get_census_data` (~146 tokens)

Census Data (1795–1899)

Dutch census data for a place and year

Retrieves census data for a Dutch place or municipality for the census year nearest to the specified year. Available census years: 1795, 1830, 1840, 1849, 1859, 1869, 1879, 1889, 1899. Data sources: Volkstellingen.nl (DANS) and Gemeentegeschiedenis.nl. Either `place` or `gg_uri` must be provided.

Input parameters:

- `gg_uri` (string)
- `place` (string)
- `province` (string)
- `richness` (number)
- `year` (integer, required)

### `search_transcriptions` (~168 tokens)

Search Transcriptions

Full-text search across page transcriptions

Performs a full-text search across the page transcriptions of historical documents indexed by Open Archives. Mirrors the search UI at `/transcripties/zoek.php`. Results are ordered by Elasticsearch relevance (the order is fixed and cannot be overridden) and are returned paginated. Each match includes a source citation, page identifier and up to five highlighted text fragments. The set of facets returned depends on the supplied filters.

Input parameters:

- `archive_code` (string)
- `archive_number` (string)
- `inventory_number` (string)
- `lang` (string)
- `number_show` (integer)
- `q` (string, required)
- `start` (integer)
- `year_end` (integer)
- `year_start` (integer)

### `browse_transcriptions` (~158 tokens)

Browse Transcriptions

Browse transcriptions hierarchically

Returns a hierarchical browse of available page transcriptions. Mirrors `/transcripties/lijst/`. Three modes, depending on the supplied filters: * No filter — top-level list of source archives ordered by total transcription count (descending). * `archive_code` — list of all archive numbers (archieftoegangen) within that archive, ordered by archive number. * `archive_code` + `archive_number` — list of all inventories within that archive number, ordered by inventory number. The order of items is fixed and cannot be overridden. Results are always returned in full (no paging).

Input parameters:

- `archive_code` (string)
- `archive_number` (string)
- `lang` (string)

### `show_transcription` (~64 tokens)

Show Transcription

Retrieve a single transcription

Returns the full transcript of a single page along with its source citation. Mirrors `/transcripties/toon/<id>`. AI-generated summaries are deliberately not returned by this endpoint.

Input parameters:

- `id` (string, required)
- `lang` (string)

### `view_transcription` (~134 tokens)

View Transcription (IIIF deep-zoom)

Open one or more transcribed document pages in an interactive deep-zoom viewer with the transcription text alongside. Pass page identifiers returned by search_transcriptions / browse_transcriptions (form <ISIL>_<archive>_<page>, e.g. NL-SdmGA_1504889_11). Optionally highlight a term in the transcript. Hosts without MCP Apps support receive a text summary plus inline preview images.

Input parameters:

- `highlight_term` (string): Optional term to highlight in the transcription text.
- `ids` (array, required): Transcription page identifiers, e.g. ["NL-SdmGA_1504889_11"].

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp#diagnostics

## Score history

- 2026-08-03: 71
- 2026-08-02: 71
- 2026-08-01: 69
- 2026-07-31: 70

## Links

- Remote endpoint: https://mcp.openarchieven.nl/
- Repository: https://github.com/coret/openarchieven-mcp-server
- Website: https://www.openarchieven.nl/
- Changelog RSS feed: https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/coret-openarchieven-mcp-server/mcp