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Tech riderRev. 20 Sept 2026

Smithy

Ch 226.5of 26 API Design Tools
  1. 1Runs onLinux, Mac, Windows
  2. 2CostsNot stated by the maker
  3. 3OpenAPI supportYes
  4. 4Team collaborationYes
3 lines stated Written from the maker's own pages: smithy.io
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The Smithy homepage

Overview

Smithy is ranked #22 of 26 in API design tools on Specifiction. It runs on Linux, macOS, Windows.

Compared on API design tools

OpenAPI support
Yessmithy.io
Team collaboration
Yessmithy.io

Facts

Product
Smithy is an open-source, protocol-agnostic interface definition language and toolset for defining APIs and generating clients, servers, and documentation.smithy.io · 4 Oct 2026
Code generation
A single model can generate type-safe client SDKs in ten languages, server code, API reference documentation, OpenAPI, and JSON Schema.smithy.io · 4 Oct 2026
API protocols
The same service model can support REST JSON, RPC v2 CBOR, AWS JSON, and AWS Query/XML protocols.smithy.io · 4 Oct 2026
Governance
Smithy validates model standards during smithy build and checks model revisions for backward compatibility.smithy.io · 4 Oct 2026
Modeling
Smithy supports resource-based API modeling, which can be used to generate artifacts including CloudFormation schemas, SDKs, and documentation.smithy.io · 4 Oct 2026
AWS use
Smithy says it was created and is used at AWS, and that it powers AWS APIs and SDKs.smithy.io · 4 Oct 2026
License
The project is open source under the Apache 2.0 license.smithy.io · 4 Oct 2026
CLI
The Smithy CLI can build models, run ad hoc validation, compare models, and query models without requiring users to set up Java or Smithy Gradle Plugins.smithy.io · 4 Oct 2026
Supported CLI platforms
The Smithy CLI is supported on macOS x86 and ARM, Linux x86 and ARM, and Windows x64.smithy.io · 4 Oct 2026
Download verification
Smithy CLI release archives are PGP-signed and hashed, and the installation guide describes verifying their signatures and checksums.smithy.io · 4 Oct 2026
Integrations
Smithy build configurations can load extensions and code generators through Maven dependencies and plugins, including AWS-specific dependencies and an OpenAPI generator.smithy.io · 4 Oct 2026
Support
The CLI guide directs users with suggestions or issues to create an issue in the Smithy GitHub repository.smithy.io · 4 Oct 2026
Intended users
Smithy is presented for teams defining service APIs and generating SDKs, server code, and documentation across programming languages.smithy.io · 4 Oct 2026

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Sources