NS Pros Data API

The world's public data, one API.

Public data is scattered across thousands of government portals — every source with its own API style, response format, and license terms. NS Pros Data API normalizes license-cleared public data sources into one REST API and one MCP server, so developers and AI agents can query them all with a single key and a single response format.

• Catalog (no key needed): https://api.nspros.ca/v1/sources

• Product & signup: https://data.nspros.ca

• Docs: https://data.nspros.ca/docs · REST reference · MCP guide · OpenAPI spec · llms.txt

What's in the catalog

Weather, earthquakes, finance, health, business, science, and public records from sources including:

• Japan Meteorological Agency — forecasts and earthquake reports

• World Bank — worldwide economic indicators

• US National Weather Service and US Treasury Fiscal Data

• Government of Canada open data and provincial portals

• UK data.gov.uk / GOV.UK — including UK bank holidays

• Open data portals from Australia, New Zealand, Germany, Finland, Ireland, and Hong Kong, plus scholarly sources such as arXiv, Crossref, and DailyMed

New sources are added daily. Every source in the catalog is License Grade A: its license terms were reviewed and commercial redistribution is confirmed. Every response carries the source's attribution text automatically, so staying within the license terms is the default, not an afterthought.

Related MCP server: Alma Atlas

Quickstart

1. Browse the catalog — no key required

curl "https://api.nspros.ca/v1/sources?category=finance&country=US"

2. Get a free API key

Sign up at https://data.nspros.ca/signup — a free-tier key is issued immediately, no card required. The same key works for REST and MCP.

3a. Query over REST

curl -H "Authorization: Bearer <key>" \
  "https://api.nspros.ca/v1/query/uk_bank_holidays?q=2026"

Response shape (excerpt):

{
  "source": {"name": "UK bank holidays (GOV.UK)", "id": "uk_bank_holidays"},
  "license": "Open Government Licence v3.0 (OGL)",
  "attribution": "Source: UK bank holidays (GOV.UK) — contains public sector information licensed under the Open Government Licence v3.0 (OGL).",
  "query": "2026",
  "cached": false,
  "results": [
    {"title": "...", "snippet": "...", "url": "..."}
  ]
}

Each result is a normalized record with title, snippet, and url fields, whatever the original source's native format was.

Full reference: docs/rest-api.md · machine-readable spec: openapi.yaml

3b. Connect over MCP

Server URL: https://api.nspros.ca/mcp (streamable HTTP, same Bearer key)

Claude Desktop / Claude Code / Cursor — add to your MCP config (mcpServers):

{
  "mcpServers": {
    "nspros-data": {
      "url": "https://api.nspros.ca/mcp",
      "headers": {
        "Authorization": "Bearer <key>"
      }
    }
  }
}

VS Code — uses a servers block instead:

{
  "servers": {
    "nspros-data": {
      "type": "http",
      "url": "https://api.nspros.ca/mcp",
      "headers": {
        "Authorization": "Bearer <key>"
      }
    }
  }
}

Ready-to-copy files are in examples/.

MCP tools

Details and JSON-RPC examples: docs/mcp.md

Pricing

Signing up currently issues a free-tier key immediately. Pay-as-you-go billing will be connected via Stripe in the next step; until then, no usage charges are billed.

Categories

weather_env · finance · health · business · science · general · immigration_life · library · vehicles

Filter the catalog with ?category= and ?country= (ISO country codes such as US, CA, GB, JP).

License policy

Each source carries a license grade, shown in the catalog next to its license name and attribution text:

• Grade A — commercial redistribution confirmed. The only grade offered.

• Grade B — usable with your own upstream key (BYO). Planned, not offered yet.

• Grade C — internal use only. Not offered.

• Grade D — on hold pending license review. Not offered.

When you display or redistribute results, keep the attribution field that comes with every response — it states the original source and its license.

The documentation and example code in this repository are MIT-licensed (see LICENSE). Data returned by the API remains under each original source's license, as stated in the response's license and attribution fields.

Rate limits

• Per key: 120 requests/minute

• Per source: 30 requests/minute

• Responses are cached per source with a source-specific TTL, so repeated identical queries return faster.

Contact

NS Pros — Halifax, Nova Scotia, Canada hello@nspros.ca · https://nspros.ca · https://data.nspros.ca