← Agent Data Hub · Search endpoints · /llms.txt

Find Open Datasets — data.europa.eu, Zenodo, Harvard Dataverse and HDX in One Search

Asks the search of four big open data directories at once and returns at most five datasets that fit the question: the subject words must be in the title or keywords and the dataset must be about the country asked; recent data with an open licence and a data format come first. Gives title, publisher, country, licence, format, last update, link and why it was chosen. Returns nothing rather than a poor match.

Call it (no API key)

GET https://api.agentdatahub.de/api/v1/call/open-data-search?q=air%20quality%20delhi&limit=5&compact=1

Full metadata: verbose=1 · Markdown: format=llm · Only some fields: add &fields=a,b.c · MCP: tool call_api with {"apiId":"open-data-search"}

Parameters

Example response (live, compact)

{
  "apiId": "open-data-search",
  "trust": "checked",
  "data_freshness": "live",
  "data": {
    "query": "air quality delhi",
    "country": null,
    "results": [
      {
        "title": "Dataset: Air Quality Dataset for Delhi (2022-08-01 to 2026-02-18)",
        "publisher": null,
        "country": null,
        "licence": "cc-zero",
        "licence_open": true,
        "format": [
          "ZIP"
        ],
        "updated": "2026-02-17",
        "url": "https://zenodo.org/records/18673773",
        "source": "Zenodo",
        "why": "title or keywords hold 3 of 3 subject words; open licence; format ZIP; updated 2026-02-17"
      },
      {
        "title": "Effect of MODIS and VIIRS AOD assimilation on air quality forecast in New Delhi",
        "publisher": null,
        "country": null,
        "licence": "cc-by-4.0",
        "licence_open": true,
        "format": [
          "ZIP"
        ],
        "updated": "2025-04-22",
        "url": "https://zenodo.org/records/15262578",
        "source": "Zenodo",
        "why": "title or keywords hold 3 of 3 subject words; open licence; format ZIP; updated 2025-04-22"
      },
      {
        "title": "What Is Polluting Delhi's Air? A Review from 1990 to 2022",
        "publisher": null,
        "country": null,
        "licence": "cc-by-4.0",
        "licence_open": true,
        "format": [
          "XLSX",
          "PDF",
          "RAR",
          "JPG",
          "CSV"
        ],
        "updated": "2024-07-12",
        "url": "https://zenodo.org/records/7595761",
        "source": "Zenodo",
        "why": "title or keywords hold 2 of 3 subject words; open licence; format XLSX/CSV; updated 2024-07-12"
      },
      {
        "title": "Enhancing accuracy of air quality and temperature forecasts during paddy crop-residue burning season in Delhi via chemical data assimilation",
        "publisher": null,
        "country": null,
        "licence": "cc-by-4.0",
        "licence_open": true,
        "format": [
          "GZ"
        ],
        "updated": "2020-07-03",
        "url": "https://zenodo.org/records/3924878",
        "source": "Zenodo",
        "why": "title or keywords hold 3 of 3 subject words; open licence; updated 2020-07-03"
      },
      {
        "title": "Real-time measurement and source apportionment of elements in Delhi's atmosphere",
        "publisher": null,
        "country": null,
        "licence": "cc-by-4.0",
        "licence_open": true,
        "format": [
          "XLSX"
        ],
        "updated": "2020-06-25",
        "url": "https://zenodo.org/records/3907250",
        "source": "Zenodo",
        "why": "title or keywords hold 2 of 3 subject words; open licence; format XLSX; updated 2020-06-25"
      }
    ],
    "searched": [
      {
        "source": "data.europa.eu",
        "ok": true,
        "hits": 20,
        "ms": 2422
      },
      {
        "source": "Zenodo",
        "ok": true,
        "hits": 20,
        "ms": 2377
      },
      {
        "source": "Harvard Dataverse",
        "ok": true,
        "hits": 20,
        "ms": 2362
      },
      {
        "source": "HDX",
        "ok": true,
        "hits": 20,
        "ms": 2960
      }
    ],
    "ms": 2974,
    "note": "Datasets found by the directories' own search and filtered here; open one with its url. Licences are per dataset."
  },
  "source": "data.europa.eu, Zenodo, Harvard Dataverse, Humanitarian Data Exchange (search APIs)",
  "source_url": "https://data.europa.eu/api/hub/search/",
  "license": "Metadata: data.europa.eu CC0, Zenodo CC0; each dataset keeps its own licence (shown per result)",
  "licence_status": "yellow"
}

Source & license