How do I generate SDK examples from an API spec?

To generate SDK examples from an API spec, the usual workflow is:

1) Start with a machine-readable API spec

Use something like:

• OpenAPI for REST APIs
• gRPC/protobuf for gRPC APIs
• GraphQL schema for GraphQL APIs

For SDK examples, OpenAPI is the most common.

2) Decide what “examples” means

You may want one or more of these:

• Code snippets for docs
• Runnable SDK sample projects
• Language-specific example calls generated from operations
• Request/response examples from schema examples in the spec

3) Add example data to the spec

To generate good examples, include:

• summary / description
• example / examples fields in schemas
• sample values for parameters and request bodies
• example responses for each endpoint

In OpenAPI, for instance:

paths:
  /users:
    post:
      summary: Create a user
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UserCreate'
            example:
              name: Ada Lovelace
              email: ada@example.com

4) Use a generator or documentation tool

Depending on your output, common tools include:

For SDK code generation

• OpenAPI Generator
• Swagger Codegen (older)
• Kiota (Microsoft)
• Fern
• Speakeasy
• StepZen (more GraphQL-oriented)

These can generate SDKs, and some can also generate example snippets or docs.

For docs with examples

• Redoc / Redocly
• Swagger UI
• Stoplight
• Docusaurus + custom plugins
• Slate / Mintlify / ReadMe integrations

5) Generate language-specific snippets

If you want examples like:

client.users.create(name="Ada Lovelace")

you typically need a snippet generator that maps OpenAPI operations to SDK methods.

Some platforms support this directly:

• OpenAPI + SDK generator
• Docs tooling with snippet templates
• Custom templates if your SDK method names differ from the raw API paths

6) Validate against the generated SDK

Make sure the examples:

• use the correct method names
• include required auth setup
• reflect actual parameter names and types
• are runnable and tested

7) Automate in CI

A common setup:

• Spec changes trigger SDK generation
• Example snippets are regenerated
• Tests verify examples compile/run
• Docs are published automatically

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Practical approach for OpenAPI

If you have an OpenAPI spec and want examples in multiple languages:

1. Add examples to the spec.
2. Generate SDKs with OpenAPI Generator or Fern/Speakeasy.
3. Use a docs generator or template layer to render code snippets per language.
4. Run example tests in CI.

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If you want a quick-start toolchain

A simple modern stack is:

• OpenAPI spec
• OpenAPI Generator for SDKs
• Redocly / Mintlify / ReadMe for docs
• CI pipeline to regenerate snippets and validate them

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If you want, I can show you:

1. a concrete OpenAPI example,
2. how to generate Python/JavaScript/Java SDK snippets, or
3. a full CI pipeline for auto-generating examples from your spec.