Opendata Cat is answering right now. Last checked 8 min ago. 58 installs a week from npm. It exposes 8 tools. Last commit 17 Sep 2026.
15 Catalan portals + radio archive: gov, INE/REE/CNMC, CORA, Catalònica, radioteca.cat.
Installs per day
peak 107 · avg 13 · -72% w/w
a month agotoday
Uptime history
91 days of history · worst day 84%
91 days agonow
100.0%
Uptime 24h
91 of 91 checks
8
Tools
read from the server
279 ms
Response time
average over 24h
58
Installs / week
npm and PyPI
Opendata Cat missed 3 checks this week
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.
run in your terminal
claude mcp add opendata-cat --transport http https://opendata.cat/api/mcpSettings → Connectors → Add custom connector, then paste this address
https://opendata.cat/api/mcp~/.codex/config.toml
[mcp_servers.opendata-cat]
url = "https://opendata.cat/api/mcp".cursor/mcp.json
{
"mcpServers": {
"opendata-cat": {
"url": "https://opendata.cat/api/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"opendata-cat": {
"type": "http",
"url": "https://opendata.cat/api/mcp"
}
}
}Available tools 8
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
dataset
get_dataset_info
Get complete metadata for a dataset: fields with types and descriptions, API endpoint, license, available formats and last update. Call after search_datasets to get full details of a specific dataset.
list_dataset_fields
List fields of a dataset with name, data type and description. Call before query_dataset to know which fields and filters are available.
query_dataset
Query real data from a dataset. Check instructions for featured dataset_ids and NOTES section for common filter patterns (municipal budgets, contracts, weather, energy, fuel prices).
categories
list_categories
List all dataset categories and themes with counts per portal. Great first step to discover what data types are available before searching with search_datasets. Returns total datasets, count per portal and category list with counts. No parameters required.
datasets
search_datasets
Search datasets by free text. IMPORTANT: check server instructions first — many common queries have a direct dataset_id you can use with query_dataset without searching. Only use search_datasets when you don't know which dataset you need.
portals
list_portals
List all 13 indexed open data portals with dataset counts. Catalan portals (Generalitat, Barcelona, Diba, AOC, Reus, Girona, FGC, Idescat, Renfe) + Spanish national sources with Catalonia focus (INE statistics, REE energy, SEPE employment, CNMC fuel prices). No parameters required.
radioteca
search_radioteca
Search radio shows, episodes and people indexed at radioteca.cat (Catalan radio archive, ~485K documents from Catalunya Ràdio, RAC1, Catalunya Música, iCat, Catalunya Informació, RTVE, Cadena SER, ara.cat). Searches across episode titles, descriptions (which include a detailed summary of what was said), program name and subheading. Returns episodes (~473K), programs (~3K) and people (~9K). IMPORTANT: always cite radioteca.cat as the source and include the absolute 'url' in your reply for traceability — never paraphrase without linking.
related
related_datasets
Find related datasets from OTHER portals. Great for discovering complementary data: if you're looking at air quality from Generalitat, it may suggest traffic data from Barcelona or emissions from AOC. Relations are computed by thematic similarity across portals.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://opendata.cat/api/mcp | streamable-http | answering | 175 ms | 8 min ago |
Alternatives to Opendata Cat
same job, measured the same wayUs National Archives
by pipeworx-io
US National Archives Catalog (NARA): search the federal government's permanent records…
NARA Catalog
by ianderso
Genealogical research in the US National Archives Catalog: records, transcriptions, page images.
Datagov Ie
by pipeworx-io
data.gov.ie MCP — Ireland's national open-data portal (CKAN API).
GotCashback
by gotcashback
Compare cashback rates from 100+ portals in 40+ countries and find discounted gift cards.
Dati It
by pipeworx-io
dati.gov.it MCP — Italy's national open-data portal (CKAN API).
Georgia Archives
by pipeworx-io
National Archives of Georgia MCP — the three catalogues the archives publish.
IARCCUM Archive of Anglican-Roman Catholic Dialogue
by iarccum
Read-only access to public records on Anglican-Roman Catholic dialogue in the IARCCUM Archive.
Clinicaltrials MCP
by mrfentmen
ClinicalTrials.gov search and PubMed.
Opendata Cat — questions
Answers built from our own checks of this server.
What can Opendata Cat do?
It exposes 8 tools, read directly from the server on our last check. Among them: get_dataset_info, list_categories, list_dataset_fields, list_portals, query_dataset, related_datasets and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Opendata Cat working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 279 ms. The bar chart above shows every period we have measured.
How do I connect Opendata Cat?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Opendata Cat need an API key?
No. Opendata Cat completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Opendata Cat?
It answers our handshake in 279 ms on average, which is faster than 50% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Opendata Cat?
The npm package @opendata.cat/mcp-server was installed 58 times in the last week. Week over week that is -72%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Opendata Cat open source?
The code is open source: it is published under the MIT licence, written in TypeScript, 22 stars on GitHub and 2 open issues. The licence covers the code in the repository, not the hosted service at opendata.cat, which runs on its operator's own terms.