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Data.gov Dataset Search API: US Government Open Data Catalog

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Search the US federal open-data catalog by keyword, agency, government level, tag, theme or file format and get one row per dataset: title, publisher, description, licence, issue and harvest dates, popularity and every resource download URL. Dictionary modes list the agencies and the tags.

Pricing

from $1.40 / 1,000 catalog row returneds

Rating

0.0

(0)

Developer

Samat Makatov

Actor stats

Bookmarked

Total users

Monthly active users

4 days ago

Last modified

Categories

Developer tools

Business

Row type

rowType

Required

dataset, organization or keyword. Always present, also when fields narrows the row.

Type:string

Example:

dataset

Found

found

Optional

Dataset rows only: false on the marker row of a slug the catalog does not hold (dataset mode), true otherwise.

Type:boolean

Example:

true

Catalog slug

slug

Optional

Dataset rows: the catalog slug, the last part of the catalog page URL; on a found: false row the slug that was looked up.

Type:string

Example:

air-quality

Title

title

Optional

Dataset title as the publisher wrote it.

Type:string | null

Example:

Air Quality and Health Impacts

Description

description

Optional

Plain text with markup removed, cut at maxDescriptionChars (left out of the row when it is 0).

Type:string | null

Example:

Dataset contains information on New York City air quality surveillance data.

Description cut

descriptionTruncated

Optional

true when description was cut at maxDescriptionChars.

Type:boolean

Example:

false

Organization

organizationName

Optional

Publishing organization (dataset rows) or the organization of an organization row.

Type:string | null

Example:

City of New York

Organization slug

organizationSlug

Optional

The catalog slug of the organization — the value the organizationSlug filter takes.

Type:string | null

Example:

nyc-ny

Level of government

organizationType

Optional

Federal Government, State Government, City Government, County Government, University, Tribal or Non-Profit; null for the organizations that carry no level.

Type:string | null

Example:

City Government

Source portal

publisher

Optional

The source portal the record was harvested from — the value the publisher filter takes.

Type:string | null

Example:

data.cityofnewyork.us

Publisher identifier

identifier

Optional

The publisher's own identifier for the dataset.

Type:string | null

Example:

https://data.cityofnewyork.us/api/views/c3uy-2p5r

Themes

themes

Optional

Publisher themes; often empty.

Type:string[]

Example:

[
  "Environment"
]

Tags

keywords

Optional

Catalog tags of the dataset.

Type:string[]

Example:

[
  "air quality",
  "health"
]

Licence

license

Optional

Licence URL or name when the publisher gave one.

Type:string | null

Example:

https://creativecommons.org/publicdomain/zero/1.0/

Access level

accessLevel

Optional

public, restricted public or non-public metadata.

Type:string | null

Example:

public

Issued

issued

Optional

First publication as the publisher wrote it, usually day precision.

Type:string | null

Example:

2020-12-09

Modified

modified

Optional

Last change at the publisher as written, usually day precision.

Type:string | null

Example:

2026-06-18

Publisher page

landingPage

Optional

The dataset's page on the publisher's own portal.

Type:string | null

Example:

https://data.cityofnewyork.us/d/c3uy-2p5r

Last harvested (UTC)

lastHarvestedAt

Optional

When the catalog last re-read the record, ISO 8601 UTC.

Type:string | null

Example:

2026-09-10T18:31:43.436Z

Has downloadable files

hasDownloads

Optional

The catalog marks at least one downloadable file.

Type:boolean | null

Example:

true

Has a geometry

hasSpatial

Optional

The record carries a geometry.

Type:boolean | null

Example:

false

Latitude

latitude

Optional

Centroid latitude of the dataset geometry, when there is one.

Type:number | null

Example:

38.9

Longitude

longitude

Optional

Centroid longitude of the dataset geometry, when there is one.

Type:number | null

Example:

-77.03

Popularity

popularity

Optional

The catalog's own visit counter for the dataset page.

Type:number | null

Example:

172

Number of files

resourceCount

Optional

Files and endpoints in the record.

Type:integer

Example:

File formats

formats

Optional

Lowercase format codes of the files, sorted and de-duplicated.

Type:string[]

Example:

[
  "csv",
  "json",
  "xml"
]

First file link

primaryDownloadUrl

Optional

Link of the first file of the record.

Type:string | null

Example:

https://data.cityofnewyork.us/api/v3/views/c3uy-2p5r/export.csv?accessType=DOWNLOAD

Parent collection

parentIdentifier

Optional

Set on datasets that belong to a collection.

Type:string | null

Example:

null

Harvest record

harvestRecordUrl

Optional

The catalog's harvest record for this dataset.

Type:string | null

Example:

https://catalog.data.gov/harvest_record/92d8908a-e4ca-4043-bc66-0c2b02a1e623

Catalog page

url

Optional

The catalog page of the dataset, or a catalog search for the organization or tag.

Type:string

Example:

https://catalog.data.gov/dataset/air-quality

Fetched at (UTC)

fetchedAt

Optional

Time of the request, ISO 8601 UTC.

Type:string

Example:

2026-09-29T21:42:07.309Z

Files

resources

Optional

With includeResources: one object per file with title, format, mediaType, url, describedBy.

Type:object[]

Example:

[
  {
    "title": null,
    "format": "csv",
    "mediaType": "text/csv",
    "url": "https://data.cityofnewyork.us/api/v3/views/c3uy-2p5r/export.csv?accessType=DOWNLOAD",
    "describedBy": null
  }
]

Raw metadata record

dcat

Optional

With includeRawDcat: the publisher's DCAT-US record, contact names and mailboxes removed.

Type:object

Example:

{
  "accessLevel": "public",
  "identifier": "https://data.cityofnewyork.us/api/views/c3uy-2p5r"
}

Message

message

Optional

On a found: false row: what to check.

Type:string

Example:

the catalog holds no dataset under the slug "x"

Organization id

organizationId

Optional

Organization rows: the catalog's internal id.

Type:string | null

Example:

1149ee63-2fff-494e-82e5-9aace9d3b3bf

Dataset count

datasetCount

Optional

Organization rows: datasets of the organization; tag rows: datasets carrying the tag.

Type:number | null

Example:

2707

Source portals

sourceCount

Optional

Organization rows: source portals feeding the organization.

Type:number | null

Example:

Aliases

aliases

Optional

Organization rows: alternative names the catalog stores for the organization.

Type:string[]

Example:

[
  "ca"
]

Tag

keyword

Optional

Tag rows: the tag itself.

Type:string | null

Example:

climate

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