Cancer.gov Best Bets API
Returns NCI's editorially curated 'best bet' results for a search term — the promoted, hand-picked answers cancer.gov surfaces above algorithmic search results. 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: Best Bets API
version: 1.0.0
x-apis-io-source: https://webapis.cancer.gov/bestbets/v1/swagger/v1/swagger.json
x-apis-io-harvested: '2026-09-05'
x-apis-io-method: searched
servers:
- url: https://webapis.cancer.gov/bestbets/v1
description: Production host (resolved from the URL this specification was served from; the published document
carries '/bestbets/v1')
paths:
/BestBets/{collection}/{language}/{term}:
get:
tags:
- BestBets
summary: Get the Best Bet Categories specified language and term.
operationId: BestBets_Get
parameters:
- name: collection
in: path
required: true
description: The collection to use. For normal operation use 'live'.
schema:
type: string
x-position: 1
- name: language
in: path
required: true
description: The language of the results. This should be either 'en' for English or 'es' for Spanish.
schema:
type: string
x-position: 2
- name: term
in: path
required: true
description: The search term to get categories for.
schema:
type: string
x-position: 3
responses:
'200':
description: The get.
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/IBestBetDisplay'
/BestBets/status:
get:
tags:
- BestBets
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: BestBets_GetStatus
responses:
'200':
description: "The contents of BestBetsController.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:
IBestBetDisplay:
type: object
description: Represents Display information about a Best Bet
x-abstract: true
additionalProperties: false
properties:
id:
type: string
description: Gets the ID of the category
nullable: true
name:
type: string
description: Gets the name of the category
nullable: true
html:
type: string
description: Gets the HTML to be displayed
nullable: true
weight:
type: integer
description: Gets the weighting of this category for diplay purposes
format: int32