Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/r-huijts/oorlogsbronnen-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/r-huijts/oorlogsbronnen-mcp/concept)<a href="https://agentmods.dev/rules/r-huijts/oorlogsbronnen-mcp/concept"><img src="https://agentmods.dev/badge/rules/r-huijts/oorlogsbronnen-mcp/concept/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/r-huijts/oorlogsbronnen-mcp/concept"><img src="https://agentmods.dev/badge/rules/r-huijts/oorlogsbronnen-mcp/concept.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00738 | $0.00738 |
| Opus 5 | $0.00369 | $0.00369 |
| Sonnet 5 | $0.00148 | $0.00148 |
| Haiku 4.5 | $0.00074 | $0.00074 |
Grade A, and why
concept scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Oorlogsbronnen MCP Server: Concept Document
Overview
The Oorlogsbronnen MCP Server is a specialized server implementation based on the Model Context Protocol (MCP) that provides structured access to Dutch World War II archives through the Oorlogsbronnen API. This server acts as a bridge between AI assistants and the rich historical data contained in these archives, enabling natural language queries about historical events, people, places, and artifacts from 1940-1945 in the Netherlands.
Architecture
The server is built using the MCP SDK and implements three key components:
- Transport Layer: Utilizes the StdioServerTransport for communication via standard input/output streams
- API Client: Encapsulates communication with the Oorlogsbronnen REST API
- MCP Tools: Exposes functionality through standardized tools, prompts, and resources
Data Sources
The server interfaces with the Oorlogsbronnen archive system through a REST API:
- Base URL: https://rest.spinque.com/4/netwerkoorlogsbronnen/api/in10
- Content Types:
- Person (biographical records)
- Photograph (historical images)
- Article (news articles and documents)
- VideoObject (video footage)
- Thing (physical artifacts)
- Place (geographical records)
Available Tools
1. search_ww2_nl_archives
A comprehensive search tool for querying the Dutch WW2 archives with the following parameters:
- query (required): Main search term (e.g., "Anne Frank", "Rotterdam bombing")
- type (optional): Filter by content type (Person, Photograph, Article, VideoObject, Thing, Place)
- count (optional): Number of results to return (1-100, default: 10)
The tool returns structured data including:
- Total result count
- Item ID
- Title
- Content type
- Description (when available)
- URL to the full record
Prompt Templates
1. search_help
Provides guidance on how to effectively search the Dutch WW2 archives, including:
- Parameter explanations
- Example search queries
- Available content types
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 92 lines · 738 tokens per session scan A f63d15cbd053
concept is a cursor rule published in the GitHub repository r-huijts/oorlogsbronnen-mcp (15 stars, last pushed 1y ago), licensed MIT. It adds 738 tokens to every session, about $0.0037 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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