Tag: SDKs
27 posts tagged “SDKs”.
SDKsWe tested AI agents with and without an SDK. The SDK won.
Claude agents built a Square payments integration on raw HTTP, with an OpenAPI Generator SDK, and with Square's Fern-generated SDK. With Square's SDK, 11 of 12 integrations worked in production. With the other two setups, 2 of 12 did.
Mathieu Legault- Educational
Top custom code preservation tools for generated SDK maintenance (September 2026)
Compare the top custom code preservation tools for generated SDK maintenance, from ignore files to three-way merge patches, in September 2026.
- Educational
Automating PyPI releases: a CI/CD workflow for Python SDKs (September 2026)
Automate Python SDK publishing with GitHub Actions: trusted publishing, computed versions, and the pre-upload test gate for PyPI releases in September 2026.
- Educational
Speakeasy reviews, pricing, and alternatives (September 2026)
Speakeasy reviews, pricing, and alternatives: how its SDK generator compares to Fern, OpenAPI Generator, APIMatic, and Kiota in September 2026.
- Educational
Generate idiomatic TypeScript clients from OpenAPI: complete guide (September 2026)
Generate an idiomatic TypeScript client from OpenAPI: casing, unions, error shape, runtime targets, and the dependency budget. A complete guide for September 2026.
- Educational
Multi-language SDK generation automation: complete guide (September 2026)
Multi-language SDK generation automation covers generation, versioning, testing, and publishing to every package registry. A complete guide for September 2026.
- Educational
Handling breaking changes: automating semantic versioning for API SDKs (August 2026)
Semantic versioning for API SDKs works when the bump is computed from the contract diff rather than the commit log. A CI playbook for August 2026.
- Educational
Top automated package publishing platforms for SDK distribution (August 2026)
Compare the top automated package publishing platforms for SDK distribution, from npm publishing automation to PyPI automation, in August 2026.
- Educational
What is an API CLI generator? A complete guide for developers (July 2026)
An API CLI generator turns your OpenAPI spec into a command-line tool. Complete guide to how it works, benefits, and tradeoffs in July 2026.
- Educational
How to build a CLI for your API without writing it from scratch (July 2026)
How to build a CLI for your API in July 2026: design commands, auth, and output, then generate the whole tool from your OpenAPI spec instead of hand-coding it.
- Educational
OpenAPI Generator CLI vs Fern: what's the difference? (July 2026)
Compare openapi-generator-cli vs Fern CLI in July 2026: template-based generation you maintain yourself versus idiomatic SDKs and synced docs from one spec.
ProductIntroducing Fern Replay
Replay reapplies SDK customizations on top of every regeneration, automatically. Available across all SDK languages.
Tanmay Singh
EducationalMigrate from Stainless today
Compare Fern vs Stainless SDK generators in January 2026. Fern offers 9+ languages, WebSockets, gRPC, CLI workflow, and on-premise deployment vs Stainless dashboard approach.
Alex McKinney- Educational
API development guide [March 2026]
Learn API development tools and best practices including spec-first workflows, testing strategies, and SDK generation. Updated March 2026 with latest techniques.
Nathan Lian 
ProductFern's Rust SDK generator
Generate production-ready Rust client libraries from your API spec, built for performance-critical applications.
Devin Logan- Educational
Evergreen SDKs Developer Guide (January 2026)
Learn how evergreen SDKs auto-sync with API specs to eliminate drift and manual maintenance. Automate SDK generation, versioning, and publishing in January 2026.
Nathan Lian - Educational
Stainless Pricing & Alternatives (January 2026)
Compare Stainless pricing, reviews, and alternatives in January 2026. Find SDK generators with WebSocket, gRPC support, and multi-language coverage for production APIs.
Nathan Lian - Educational
Fern vs Speakeasy SDK Generator (May 2026) | Fern
Compare Fern vs Speakeasy SDK generators in May 2026. Fern supports 9 languages including Swift and Ruby, on-premises deployment, and synchronized docs vs Speakeasy's 5 languages.
Nathan Lian 
EducationalOpen Source vs Closed Source SDK Generators 2025
Compare open source, closed source, and open-core SDK generation platforms in December 2025. Learn about OpenAPI Generator, Speakeasy, Stainless, and Fern for API SDKs.
Nathan Lian
ProductIntroducing Fern Autorelease: hands-off SDK releases
Fern Autorelease automatically detects updates to your API specification, regenerates SDKs, determines version bumps, and publishes new packages.
Devin Logan
EducationalOpenAPI code generation for enterprise (Nov 2025)
Compare the best OpenAPI code generation platforms for enterprise teams in November 2025. Learn about SDK generation, breaking change detection, and compliance features.
Nathan Lian- Educational
Best SDK generation tools 2026 | Multi-language APIs | Fern
Compare the best SDK generation tools for 2026. Build type-safe client libraries for TypeScript, Python, Go, Java & more. Save hundreds of hours. April 2026.
Nathan Lian 
ProductFern's Swift SDK generator: build idiomatic iOS client libraries
Fern’s Swift SDK generator is live. Instantly provide iOS developers with an idiomatic Swift client for your API.
Ryan Tish
StrategyHow to generate a TypeScript SDK for your API spec
Learn how to deliver a TypeScript SDK that’s lightweight, fully type-safe, and works across all JavaScript runtimes with Fern.
Niels Swimberghe
ShowcaseThe first autogenerated SDK with gRPC and REST
Fern breaks new ground by launching the first generated SDK supporting both gRPC and REST in a single package. Partnering with Pinecone, they delivered an idiomatic C# SDK that streamlines development by combining performant gRPC data operations with REST-based control features, now integrated into Microsoft's Semantic Kernel.
Alex McKinney
ShowcaseFrom handwritten to generated—Cohere's SDK journey
Cohere partnered with Fern to transform their SDK development from manual TypeScript and Go implementations to automated generation. By centralizing their API spec and leveraging Fern's language-specific code generation, Cohere eliminated SDK maintenance overhead while delivering idiomatic features like TypeScript's discriminated unions and Go's context primitives, reducing GitHub issue resolution time from months to days.
Niels Swimberghe
ShowcaseHow Merge uses Fern to ship SDKs
Merge streamlined their SDK development by switching from OpenAPI to Fern, enabling cleaner APIs and automated workflows across six programming languages. The rapid 4-week implementation delivered enhanced documentation and compatibility, earning praise from developers for its simplified integration process.
Niels Swimberghe