University of Chicago

University of Chicago Gen3 Peregrine — graphql API

GraphQL Queries

Documentation GitHub OpenAPI

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/university-of-chicago-graphql-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.0.0
info:
  title: Gen3 Peregrine OpenAPI Specification — graphql API
  version: 0.1.0
  description: >-
    Peregrine is the Gen3 GraphQL query service, authored by the University of Chicago Center for Translational Data Science.
    Code: https://github.com/uc-cdis/peregrine
  termsOfService: http://cdis.uchicago.edu/terms/
  contact:
    email: cdis@uchicago.edu
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
servers:
- url: https://gen3.datacommons.io/
  description: >-
    University of Chicago Center for Translational Data Science (CTDS) reference Gen3 data
    commons. Gen3 is deployable software authored by CTDS (github.com/uc-cdis), so the upstream
    specification ships a placeholder host; this is the base URL of the deployment CTDS itself
    operates. The datacommons.io domain is registered to CDIS, University of Chicago.
  x-operator: institution
  x-verified: '2026-08-19'
  x-verified-evidence: https://gen3.datacommons.io/.well-known/openid-configuration
tags:
- name: graphql
  description: GraphQL Queries
paths:
  /graphql:
    post:
      tags:
      - graphql
      summary: Perform a GraphQL Query
      description: Perform a graphql query over the data commons given a query, variables, and name.
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/QueryOutputRef'
        '400':
          description: Invalid input
        '403':
          description: Invalid authorization token
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/QueryInputInfo'
        description: The GraphQL query and parameters
        required: true
  /getschema:
    get:
      tags:
      - graphql
      summary: Returns the data dictionary schema json
      description: The data dictionary for the data commons is internally converted from yaml files to json. This endpoint returns the json schema for the dictionary for use in generating queries.
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SchemaOutputRef'
components:
  schemas:
    QueryInputInfo:
      type: object
      properties:
        query:
          type: string
          description: the text of the GraphQL query
        variables:
          type: string
          description: variables for the GraphQL query
        operationName:
          type: string
          description: the name of the operation
      example:
        query: '{ project {project_id} }'
        operationName: null
        variables: null
    SchemaOutputRef:
      type: object
      properties:
        data:
          type: object
          description: the json schema for the data dictionary
    QueryOutputRef:
      type: object
      properties:
        data:
          type: object
          description: the results of the GraphQL query
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: /oauth/authorize
          tokenUrl: /oauth/token
          scopes:
            user: generic user access