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Skillshub generating-api-sdks

install
source · Clone the upstream repo
git clone https://github.com/ComeOnOliver/skillshub
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/ComeOnOliver/skillshub "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/jeremylongshore/claude-code-plugins-plus-skills/generating-api-sdks" ~/.claude/skills/comeonoliver-skillshub-generating-api-sdks && rm -rf "$T"
manifest: skills/jeremylongshore/claude-code-plugins-plus-skills/generating-api-sdks/SKILL.md
tags
#api#api-sdks
source content

Generating API SDKs

Overview

Generate type-safe client SDKs in multiple languages (TypeScript, Python, Go, Java) from OpenAPI 3.0+ specifications. Produce idiomatic client libraries with authentication handling, automatic retries, pagination helpers, and comprehensive type definitions that mirror the API contract.

Prerequisites

  • OpenAPI 3.0+ specification file (YAML or JSON) with complete schema definitions
  • Target language toolchain installed (Node.js/TypeScript, Python 3.10+, Go 1.21+, or Java 17+)
  • OpenAPI Generator CLI or equivalent code generation tool
  • Package registry credentials for publishing (npm, PyPI, Maven Central, pkg.go.dev)
  • CI pipeline for automated SDK builds on spec changes

Instructions

  1. Read and validate the OpenAPI specification using Read, checking for complete schema definitions, proper 
    $ref
    usage, and response type coverage across all endpoints.
  2. Extract all operation IDs, request/response models, and authentication schemes from the specification to build the SDK method inventory.
  3. Generate typed model classes for every schema component, including nested objects, enums, and discriminated unions with proper nullability annotations.
  4. Create a client class with methods for each API operation, mapping operation IDs to idiomatic method names (e.g., 
    listUsers
    , 
    get_user
    , 
    CreateUser
    ).
  5. Implement authentication handling with support for Bearer tokens, API keys (header and query), and OAuth2 client credentials flow, configurable at client instantiation.
  6. Add automatic retry logic with exponential backoff for 429 and 5xx responses, with configurable max retries and backoff multiplier.
  7. Build pagination helpers that abstract cursor-based and offset pagination into iterator/generator patterns native to each target language.
  8. Generate comprehensive JSDoc/docstring/Javadoc comments from OpenAPI 
    description
    and 
    summary
    fields for full IDE IntelliSense support.
  9. Create a test suite that validates SDK methods against a mock server running the OpenAPI spec, covering authentication, error handling, and pagination.

See 

${CLAUDE_SKILL_DIR}/references/implementation.md
for the full implementation guide.

Output

  • ${CLAUDE_SKILL_DIR}/sdk/typescript/src/client.ts
    - Main SDK client class with typed methods
  • ${CLAUDE_SKILL_DIR}/sdk/typescript/src/models/
    - TypeScript interfaces and type definitions
  • ${CLAUDE_SKILL_DIR}/sdk/python/client.py
    - Python SDK with dataclass models and async support
  • ${CLAUDE_SKILL_DIR}/sdk/go/client.go
    - Go SDK with struct types and context-based methods
  • ${CLAUDE_SKILL_DIR}/sdk/*/README.md
    - Per-language installation and usage documentation
  • ${CLAUDE_SKILL_DIR}/sdk/*/tests/
    - SDK test suites per language

Error Handling

ErrorCauseSolution
Schema generation failureOpenAPI spec contains 
$ref
cycles or missing component definitions		Run spec linting with 
spectral
first; resolve circular references with 
allOf
composition
Type mismatchAPI response does not match generated model types at runtimeAdd runtime response validation option; log schema drift warnings for API provider notification
Auth configuration errorSDK instantiated without required credentials for protected endpointsThrow descriptive error at client construction time listing required auth parameters
Pagination exhaustionIterator consumes all pages without termination conditionEnforce maximum page count safety limit; detect empty result sets as termination signal
Rate limit handlingSDK retry logic conflicts with application-level retry logicExpose 
retryConfig
option to disable built-in retries; emit retry events for observability

Refer to 

${CLAUDE_SKILL_DIR}/references/errors.md
for comprehensive error patterns.

Examples

TypeScript SDK for payment API: Generate a fully typed 

PaymentsClient
with methods like 
createCharge(amount, currency)
returning 
Promise<Charge>
, automatic Bearer token injection, and paginated 
listTransactions()
returning an async iterator.

Python SDK with async support: Produce both sync (

PaymentsClient
) and async (
AsyncPaymentsClient
) clients using 
httpx
, with Pydantic models for request/response validation and 
__aiter__
pagination support.

Multi-language CI pipeline: On OpenAPI spec change, automatically regenerate SDKs in all target languages, run tests against a mock server, bump semantic versions, and publish to respective package registries.

See 

${CLAUDE_SKILL_DIR}/references/examples.md
for additional examples.

Resources