Cancer.gov Site-Wide Search API
The search service behind cancer.gov's own site search: full-text search and autosuggest across NCI web content, with per-collection scoping and status reporting. No credential required.
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OpenAPI Specification
x-generator: NSwag v13.20.0.0 (NJsonSchema v10.9.0.0 (Newtonsoft.Json v13.0.0.0))
openapi: 3.0.0
info:
title: Site-Wide Search API
version: 1.0.0
x-apis-io-source: https://webapis.cancer.gov/sitewidesearch/v1/swagger/v1/swagger.json
x-apis-io-harvested: '2026-09-05'
x-apis-io-method: searched
servers:
- url: https://webapis.cancer.gov/sitewidesearch/v1
description: Production host (resolved from the URL this specification was served from; the published document
carries '/sitewidesearch/v1')
paths:
/Autosuggest/{collection}/{language}/{term}:
get:
tags:
- Autosuggest
summary: Retrieves a collection of potential search terms based on the value passed as term.
description: 'Collection is of the form {sitename}_{lang_code}. Currently, {sitename} is always "cgov" and
{lang_code} may
be either "en" (English) or "es" (Español).'
operationId: Autosuggest_Get
parameters:
- name: collection
in: path
required: true
description: The search collection/strategy to use. This defines the ES template to use.
schema:
type: string
x-position: 1
- name: language
in: path
required: true
description: The language to use. Only "en" and "es" are currently supported.
schema:
type: string
x-position: 2
- name: term
in: path
required: true
description: The search term to use as a basis for search terms
schema:
type: string
x-position: 3
- name: size
in: query
description: The maximum number of results to return.
schema:
type: integer
format: int32
default: 10
x-position: 4
responses:
'200':
description: A Suggestions collection of Suggestion objects.
content:
application/json:
schema:
$ref: '#/components/schemas/Suggestions'
/Autosuggest/status:
get:
tags:
- Autosuggest
summary: 'Provides an endpoint for checking that the various services which make up the API
(and thus the API itself) are all in a state where they can return information.'
operationId: Autosuggest_GetStatus
responses:
'200':
description: "The contents of SearchController.HEALTHY_STATUS ('alive!') if\n all services\
\ are running. If unhealthy services are found, APIErrorException is thrown\n with HTTPStatusCode\
\ set to 500."
content:
application/json:
schema:
type: string
/Search/{collection}/{language}/{term}:
get:
tags:
- Search
summary: Gets the results of a search
operationId: Search_Get
parameters:
- name: collection
in: path
required: true
description: The search collection/strategy to use.
schema:
type: string
x-position: 1
- name: language
in: path
required: true
description: The language to use. Only "en" and "es" are currently supported.
schema:
type: string
x-position: 2
- name: term
in: path
required: true
description: The search term to search for
schema:
type: string
x-position: 3
- name: from
in: query
description: The offset of results to retrieve
schema:
type: integer
format: int32
default: 0
x-position: 4
- name: size
in: query
description: The number of items to retrieve
schema:
type: integer
format: int32
default: 10
x-position: 5
- name: site
in: query
style: form
explode: true
description: An optional parameter used to limit the number of items returned based on site.
schema:
type: array
nullable: true
items:
type: string
x-position: 6
responses:
'200':
description: A SiteWideSearchResults collection object
content:
application/json:
schema:
$ref: '#/components/schemas/SiteWideSearchResults'
/Search/status:
get:
tags:
- Search
summary: 'Provides an endpoint for checking that the various services which make up the API
(and thus the API itself) are all in a state where they can return information.'
operationId: Search_GetStatus
responses:
'200':
description: "The contents of SearchController.HEALTHY_STATUS ('alive!') if\n all services\
\ are running. If unhealthy services are found, APIErrorException is thrown\n with HTTPStatusCode\
\ set to 500."
content:
application/json:
schema:
type: string
components:
schemas:
Suggestions:
type: object
description: 'Container for the the list of potential search terms returned
by the SiteWideSearch.AutosuggestController.'
additionalProperties: false
properties:
results:
type: array
description: The set of potential search items.
nullable: true
items:
$ref: '#/components/schemas/Suggestion'
total:
type: integer
description: The total number of matching search terms available.
format: int64
Suggestion:
type: object
description: Represents a single Autosuggest suggestion.
additionalProperties: false
properties:
term:
type: string
description: The Backend ID for this item
nullable: true
SiteWideSearchResults:
type: object
description: Represents the results of a sitewide search operation.
additionalProperties: false
properties:
results:
type: array
description: Array of SiteWideSearchResult objects matching the search. May be empty.
nullable: true
items:
$ref: '#/components/schemas/SiteWideSearchResult'
totalResults:
type: integer
description: The total number of results matching the search criteria.
format: int64
SiteWideSearchResult:
type: object
description: Represents a Single Site-Wide Search Result
additionalProperties: false
properties:
title:
type: string
description: The title of this item
nullable: true
url:
type: string
description: The URL for this result
nullable: true
contentType:
type: string
description: Gets the content type of this result if there is one
nullable: true
description:
type: string
description: Gets the description of this result
nullable: true