Large selection of open APIs

We share links to examples of APIs of different styles, which can be used online directly on websites. There is also documentation for most of the links.

REST API

1. Swagger Petstore – official trainer from Swagger

2. Space X API — Postman collection (can also be done online)

3. VK API – possible online

4. REST API for GitHub + Postman collection

5. API FIAS (KLADR)

6. Training apparatus REST Ninja + Swagger documentation

7. API DaData — you can twitch directly on the site

8. Polygon.io Stocks API — API aggregator from US stock exchanges. There are libraries for Python, Go, Javascript, PHP, Kotlin

9. Blockchain.com Exchange REST API — swagger of a popular cryptocurrency exchange

10. Kraken REST API — example of detailed API documentation and specification in OpenAPI format + code examples in Python

➕ More examples of open REST APIs

GraphQL

1. GitHub API – Documentation + try online

2. API Space X online

3. Shopify GraphQL API

4. Open API with country data + documentation and sources

5. Amazon Product Data API + documentation + repository

6. Anime manga fan site API + documentation

➕ More examples of open GraphQL APIs

SOAP

1. Central Bank of Russia

2. Online number conversion service + Postman collection

3. PayPal SOAP API

4. SOAP sandbox

JSON-RPC

1. Wrapper for Solana JSON-RPC, official documentation

2. OpenRPC example + documentation

3. Example documentation for the JSON-RPC API

4. JSON-RPC API for zkLink

gRPC

1. Google API

2. Google Cloud Bigtable gRPC API

Websockets

1. Binance WebSocket API Documentation — Crypto exchange API

2. Gate.io Spot WebSocket v4 — another example from a cryptocurrency exchange, there are code examples in Python

3. Polygon.io WebSocket API — aggregator of data from US stock exchanges. There are libraries for Python, Go, Javascript, PHP, Kotlin

4. Blockchain.com Websocket API — documentation from a popular cryptocurrency exchange with code examples in Python

5. EXMO Websocket API + Example API documentation in Postman (Websockets and REST)

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