A retrieval guide for discovering Estonian public datasets through the national open-data portal. It reads the portal’s RSS catalog, which is a machine-readable feed of dataset updates, then identifies useful dataset pages and direct downloads.

Use it to search dataset titles and descriptions in Estonian or English, then collect the publisher, license, update date, formats, and access links.

It gives you a fallback when you do not know which official source or API contains the data. It also warns that a dataset page may describe a source without providing a working download.

open-data — Skill for Claude Code by taivop

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 taivop/marketplace --skill open-data

Clone the repo

git clone --depth 1 https://github.com/taivop/marketplace

Made for: Claude Code.

Or install estonia-public-sources, the plugin that ships this one along with the rest of its 88 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/taivop/marketplace/open-data/github.svg)](https://agentmods.dev/skills/taivop/marketplace/open-data)

Your own site

<a href="https://agentmods.dev/skills/taivop/marketplace/open-data"><img src="https://agentmods.dev/badge/skills/taivop/marketplace/open-data/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/taivop/marketplace/open-data"><img src="https://agentmods.dev/badge/skills/taivop/marketplace/open-data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 350 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00023	$0.00350
Opus 5	$0.00012	$0.00175
Sonnet 5	$0.00005	$0.00070
Haiku 4.5	$0.00002	$0.00035

Measured 5d ago against content hash f5552906d415, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

open-data 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 5d 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.

skills/estonia-public-sources/sources/open-data/SKILL.md · 34 lines

What it actually says

National Open Data Discovery

Access

Public RSS catalog at https://andmed.eesti.ee/api/rss/feed. The interactive portal may require a browser or normal user agent, but the RSS feed is directly machine-readable.

Retrieve

Download and parse the RSS feed.
Search item title and description using both Estonian and English terms.
Use link/guid to open the matching dataset page, then capture publisher, update date, license, formats, and direct distributions.
Prefer an existing source-specific recipe when the dataset points to a known API or registry.

RSS items contain title, description, link, guid, and pubDate. The feed contained 2,831 items in the 2026-07-14 verification run.

Return

Return a short ranked list with dataset title, owner, dataset-page URL, update date, description, license, format/access method, direct data URL, and recommended next recipe. Do not return the whole catalog.

Limits

RSS describes dataset updates; it does not expose every portal facet or all distribution metadata.
A dataset page can describe a source without providing a working distribution. Verify the final API/file separately.
Use this only as fallback discovery, not as a substitute for a known acquisition recipe.

Verify

Require HTTP 200 application/rss+xml, root rss, a channel, and non-empty item elements containing title, link, and publication date. Verify the selected dataset's final distribution before claiming data access.

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.

5d ago First seen · 34 lines · 23 tokens per session scan A f5552906d415

Subscribe to this mod's changes

open-data is a skill published in the GitHub repository taivop/marketplace (17 stars, last pushed 9d ago), licensed MIT. It adds 23 tokens to every session and 350 once invoked, about $0.0001 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 2026-09-04.

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