Cloudflare Released Open-Source Forge Tool

The company launched an open-source SDK and CLI generator to reduce reliance on third-party vendors.

Updated on Sept. 28, 2026 in Software

Bold flat-color editorial illustration of stacked steel modular components, symbolizing the precision of automated code and API documentation generation. — Cloudflare has launched Forge, an open-source tool for generating software development kits and API documentation to enhance engineering stability. AI Illustration. Upload story photo >

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Cloudflare has introduced Forge, an open-source tool designed to generate SDKs, command-line interfaces, and API documentation. The release follows the company's move to eliminate platform risk after the acquisition of its former vendor, Stainless, by Anthropic.

Why it matters

By bringing generation capabilities in-house, Cloudflare ensures engineering teams can test API changes against documentation and SDKs before merging. This shift aims to provide greater stability for managing its extensive catalog of API operations.

Forge utilizes a TypeScript-based schema and generation system to maintain synchronization across its tools. The system is designed to support the infrastructure required for the company's 3,500 API operations.

The players

Cloudflare

Cloudflare is a global cloud services provider that maintains a vast network of infrastructure and security products.

Google

Google is a multinational technology corporation that recently expanded its own open-source offerings for API management.

Stainless

Stainless was a software vendor that previously provided SDK generation tools before its acquisition by Anthropic.

Anthropic

Anthropic is an artificial intelligence research and safety company that acquired Stainless in May 2026.

The details

Forge is distributed under an Apache 2.0 license and serves as a direct alternative to closed-source solutions like those previously provided by Stainless. The tool allows developers to convert API definitions into functional code and documentation pipelines.

April 2026: Cloudflare released a technical preview of its CLI tool.
May 18, 2026: Anthropic acquired the SDK provider Stainless.
September 17, 2026: Google partnered with Speakeasy to open-source its API tooling.
September 28, 2026: Cloudflare officially released the Forge tool.

The Tech Race

The transition to open-source generation tools marks a shift away from the fragmented, proprietary vendor landscape that previously defined the SDK market. This move aligns with broader efforts by tech leaders to establish standardized, internally controlled development pipelines.

Developers using Cloudflare services can expect improved documentation and SDK consistency as the company migrates its internal systems to Forge. The move reduces the likelihood of service disruptions caused by reliance on third-party, closed-source generation vendors.

The takeaway

Securing internal infrastructure is becoming a critical priority for large-scale tech companies managing thousands of API endpoints. Developers should monitor how these open-source tools evolve to see if they can be adapted for their own enterprise environments.