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Postman

Postman

API testing platform.

APIFreemiumRESTTesting
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Insomnia
Freemium

Insomnia

The collaborative API client for REST, SOAP, GraphQL, and gRPC.

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JSONPlaceholder
Free

JSONPlaceholder

Free fake and reliable REST API for testing and prototyping dashboards and lists.

RESTMock DataJSON
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GraphQL
Open Source

GraphQL

A query language for your API.

QueryAPI
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Swagger
Open Source

Swagger

API development tools for OpenAPI Specifications.

OpenAPIDocumentation
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gRPC
Open Source

gRPC

A high-performance, open source universal RPC framework.

RPCPerformance
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RapidAPI
Freemium

RapidAPI

The world's largest API hub.

HubMarketplace
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Scalar
Open Source

Scalar

Open-source API reference and documentation tool.

OpenAPIDocumentation
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REST Countries
Free

REST Countries

Get information about countries via REST API for flags, currencies, and maps.

CountriesFlagsPublic Data
API
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