archive-search

archive-search is a skill for Claude Code from AI-Riksarkivet/ra-mcp. It costs 107 tokens per session (1,632 once invoked), scanned A, original, Apache-2.0.

A search guide for Riksarkivet, Sweden's national archive, covering searches for historical documents, people, places, and text.

In plain words
What is it for?
Use it to search transcribed records or document details, including court records, church records, estate inventories, names, places, and document types.
Why use it?
It helps choose the right archive search and handle spelling differences, transcription mistakes, wildcards, and approximate matches.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ra-mcp-tools plugin — 8 skills shipped together

Good fit Use it to search transcribed records or document details, including court records, church records, estate inventories, names, places, and document types.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ai-riksarkivet/ra-mcp/archive-search
Install

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.

Any agent
npx skills add AI-Riksarkivet/ra-mcp --skill archive-search
Clone the repo
git clone --depth 1 https://github.com/AI-Riksarkivet/ra-mcp

Made for: Claude Code.

Or install ra-mcp-tools, the plugin that ships this one along with the rest of its 8 skills.

Wrote 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.

agentmods badge for archive-search

README.md
[![agentmods](https://agentmods.dev/badge/skills/ai-riksarkivet/ra-mcp/archive-search/github.svg)](https://agentmods.dev/skills/ai-riksarkivet/ra-mcp/archive-search)
Your own site
<a href="https://agentmods.dev/skills/ai-riksarkivet/ra-mcp/archive-search"><img src="https://agentmods.dev/badge/skills/ai-riksarkivet/ra-mcp/archive-search/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.

agentmods 80×15 button for archive-search

Your own site · 80×15
<a href="https://agentmods.dev/skills/ai-riksarkivet/ra-mcp/archive-search"><img src="https://agentmods.dev/badge/skills/ai-riksarkivet/ra-mcp/archive-search.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,632 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00107 $0.01632
Opus 5 $0.00053 $0.00816
Sonnet 5 $0.00021 $0.00326
Haiku 4.5 $0.00011 $0.00163

Measured 11d ago against content hash 258dc243cadb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

archive-search 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 11d 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.

plugins/ra-mcp-tools/skills/archive-search/SKILL.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Archive Search Guide

Search strategy, syntax, and best practices for the Riksarkivet search tools (search_transcribed and search_metadata).

Tool Selection

Research goal Tool Key params
Find text mentions in court records search_transcribed keyword
Find a person by name search_metadata name="Svensson"
Find documents from a place search_metadata place="Norrköping"
Find documents by title/type search_metadata keyword="bouppteckning"
Church records, estate inventories search_metadata keyword + place (not AI-transcribed)
Read full page content browse_document reference_code, pages

Query Syntax — What Actually Works

The search API is a plain free-text engine, NOT a full Solr/Lucene endpoint. Every syntax claim below is verified against the live API.

Syntax Example Meaning
Single term Stockholm Find the word
Several terms pest smitta ALL terms required in the same document (implicit AND)
Wildcard troll*, st?ckholm, *holm * = many chars, ? = one char
Fuzzy Stockholm~1 Similar words (edit distance)

NOT supported — never use:

  • AND / OR / NOT / | / parentheses. There is no boolean parser. The words AND/OR/NOT are searched as literal text: and alone matches 1.6M volumes, so pest AND smitta returns ~1.64M junk hits instead of the 33-document conjunction pest smitta. The server rejects such queries.
  • OR-logic has no syntax at all. Run one search per alternative term instead: search troll*, then häx*, and merge what you learn.
  • Quoted phrases on transcribed text. They always return 0 — even a phrase that occurs verbatim and adjacent on a page ("Venerisk smitta") yields no hits. Never quote in search_transcribed; use plain multi-term search (kyrka stöld = both words anywhere in the volume). In search_metadata, quotes work only for reference codes: "SE/RA/720660" lists an archive's volumes, but quoted title phrases return 0.
  • Proximity "a b"~10. Not honored — returns 0 like any quoted phrase.
  • Boosting (term^4). Unverified; adds nothing. Leave it out.

Read the full file on GitHub · 119 lines

Changes

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.

  1. 11d ago First seen · 119 lines · 107 tokens per session scan A 258dc243cadb

Subscribe to this mod's changes

archive-search is a skill published in the GitHub repository AI-Riksarkivet/ra-mcp (23 stars, last pushed yesterday), licensed Apache-2.0. It adds 107 tokens to every session and 1,632 once invoked, about $0.0005 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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