Mock sample for your project: JSON storage API

This API retrieves the current time for a city or geographic location around the globe.

Airbyte Configuration API
https://airbyte.io.
This API is a collection of HTTP RPC-style methods. While it is not a REST API, those familiar with REST should find the conventions of this API recognizable.
Here are some conventions that this API follows:
All endpoints are http POST methods.
All endpoints accept data via application/json request bodies. The API does not accept any data via query params.
The naming convention for endpoints is: localhost:8000/{VERSION}/{METHODFAMILY}/{METHODNAME} e.g. localhost:8000/v1/connections/create.
For all update methods, the whole object must be passed in, even the fields that did not change.
Change Management:
The major version of the API endpoint can be determined / specified in the URL localhost:8080/v1/connections/create
Minor version bumps will be invisible to the end user. The user cannot specify minor versions in requests.
All backwards incompatible changes will happen in major version bumps. We will not make backwards incompatible changes in minor version bumps. Examples of non-breaking changes (includes but not limited to...):
Adding fields to request or response bodies.
Adding new HTTP endpoints.

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]

This API allows you to interact with the VictorOps platform in various ways. Your account may be limited
to a total number of API calls per month. Also, some of these API calls have rate limits.
NOTE: In this documentation when creating a sample curl request (clicking the TRY IT OUT! button), in some API
viewing interfaces, the '@' in an email address may be encoded. Please note that the REST endpoints will not
process the encoded version. Make sure that the encoded character '%40' is changed to its unencoded form before
submitting the curl request.

This API retrieves the latest currency exchange rate, against the US Dollar, for the given three-letter international currency code. These currency rates are compiled from many global sources and are updated several times per day.

Live API Documentation

The Web Search API lets you send a search query to Bing and get back search results that include links to webpages, images, and more.

Introduction
Api2Pdf is a powerful PDF generation API with no rate limits or file size constraints. Api2Pdf runs on AWS Lambda, a serverless architecture powered by Amazon to scale to millions of requests while being up to 90% cheaper than alternatives. Supports wkhtmltopdf, Headless Chrome, LibreOffice, and PDF Merge. You can also generate barcodes with ZXING (Zebra Crossing).
SDKs & Client Libraries
We've made a number of open source libraries available for the API
Python: https://github.com/api2pdf/api2pdf.python
.NET: https://github.com/api2pdf/api2pdf.dotnet
Nodejs: https://github.com/api2pdf/api2pdf.node
PHP: https://github.com/Api2Pdf/api2pdf.php
Ruby: (Coming soon)
Authorization
Create an account at portal.api2pdf.com to get an API key.
Authorize your API calls
GET requests, include apikey=YOUR-API-KEY as a query string parameter
POST requests, add Authorization to your header.
For more advanced usage and settings, see the API specification below.

Appwrite backend as a service cuts up to 70% of the time and costs required for building a modern application. We abstract and simplify common development tasks behind a REST APIs, to help you develop your app in a fast and secure way. For full API documentation and tutorials go to https://appwrite.io/docs

This API provides a similarity key used to match with other similar full name data when data fields are parsed into first name and last name components, including for purposes of deduplication, fuzzy matching, or merging of datasets. A much higher match rate will be achieved by matching on the similarity key rather than the data itself. This API is for full name data where first and last name are in separate fields. Use the Full Name Similarity Key API for first and last name data that are in the same field.

Base API URL: https://api.configcat.com
If you prefer the swagger documentation, you can find it here: Swagger UI.
The purpose of this API is to access the ConfigCat platform programmatically.
You can Create, Read, Update and Delete any entities like Feature Flags, Configs, Environments or Products within ConfigCat.
The API is based on HTTP REST, uses resource-oriented URLs, status codes and supports JSON
and JSON+HAL format. Do not use this API for accessing and evaluating feature flag values. Use the SDKs instead.
OpenAPI Specification
The complete specification is publicly available here: swagger.json.
You can use it to generate client libraries in various languages with OpenAPI Generator or
Swagger Codegen to interact with this API.
Authentication
This API uses the Basic HTTP Authentication Scheme.
Throttling and rate limits
All the rate limited API calls are returning information about the current rate limit period in the following HTTP headers:
| Header | Description |
| :- | :- |
| X-Rate-Limit-Remaining | The maximum number of requests remaining in the current rate limit period. |
| X-Rate-Limit-Reset | The time when the current rate limit period resets. |
When the rate limit is exceeded by a request, the API returns with a HTTP 429 - Too many requests status along with a Retry-After HTTP header.

Autosuggest supplies search terms derived from a root text sent to the service. The terms Autosuggest supplies are related to the root text based on similarity and their frequency or ratings of usefulness in other searches. For examples that show how to use Autosuggest, see Search using AutoSuggest.