Mock sample for your project: Auckland Museum API

Board of Ayurvedic and Unani Systems of Medicine, Himachal Pradesh (http://hpayushboard.org/) is the online service portal by Govt. of Himachal Pradesh. Registration Certificate issued online, can be pulled into citizens DigiLocker accounts.

Enforcement and Compliance History Online (ECHO) is a tool developed and maintained by EPA's Office of Enforcement and Compliance Assurance for public use. ECHO provides integrated compliance and enforcement information for over 1 million regulated facilities nationwide.
ECHO Rest Services provide multiple service endpoints, each with specific capabilities, to search and retrieve data on facilities regulated as Clean Air Act (CAA) stationary sources, Clean Water Act (CWA) dischargers, Resource Conservation and Recovery Act (RCRA) hazardous waste generators/handlers, and Safe Drinking Water Act (SDWA) public water systems. Data of interest from other EPA sources, such as the Toxics Release Inventory, is also supplied for context.
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The getfacilities, getmap, getqid, and getdownload end points are meant to be used together, while the enhanced getfacilityinfo end point is self contained.
The getfacilityinfo end point returns either an array of state, county or zip clusters with summary statistics per cluster or an array of facilities.
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The recommended use scenario for getfacilities, getqid, getmap, and getdownoad is:
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1) Use getfacilities to validate passed query parameters, obtain summary statistics and to obtain a queryid (QID). QIDs are time sensitive and will be valid for approximately 30 minutes.
2) Use get_qid, with the returned QID, to paginate through arrays of facility results.
3) Use get_map, with the returned QID, to zoom in/out and pan on the clustered and individual facility coordinates that meet the QID query criteria.
4) Use get_download, with the returned QID, to generate a Comma Separated Value (CSV) file of facility information that meets the QID query criteria.
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Use the qcolumns parameter to customize your search results. Use the Metadata service endpoint for a list of available output objects, their Column Ids, and their definitions to help you build your customized output.
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Additional ECHO Resources: Web Services, About ECHO's Data, Data Downloads

Birth, Still-Birth, Death and Marriage Certificates issued by the Department, from 01 January 2014 onward, can be pulled into citizens' DigiLocker accounts.

BBC Nitro is the BBC's application programming interface (API) for BBC Programmes Metadata.

Tripura Board of Secondary Education, (http://tbse.in) has made available Class X (2017-2019) Marksheets in DigiLocker, which can be pulled by students into their accounts.

APIs provided by Dr. Babasaheb Ambedkar Research & Training Institute, Maharashtra.

Wikipedia for Web APIs. Repository of API specs in OpenAPI 3.0 format.
Warning: If you want to be notified about changes in advance please join our Slack channel.
Client sample: [Demo] [Repo]

A RESTful webservice to retrieve data about the operational state of public elevators and escalators in german railway stations.

This data set contains the list of polling places. It can be organized by ward/division, accessibility rating, or type of building.
This list is used to assign poll workers, send the machines and necessary accessibility materials, etc.
Endpoint: http://api.phila.gov/polling-places/v1

All about Numbers. REST access with json/xml/jsonp result support. Below is the documentation for the Numbers API. You can try them out right here. Find more information and subscribe at math.tools

Insurance policies such as health, car, two wheeler, property etc. issued by BAGIC are available to be pulled by citizens.

APIs provided by Department of Agricultural Marketing, Karnataka.