Changelog

May 1, 2026

API catalog discovery

AI agents, MCP clients, and API catalog crawlers can now discover your APIs automatically. Every Fern Docs site exposes a standards-based (RFC 9727) /.well-known/api-catalog endpoint generated from your visible API Reference navigation.

Read the docs

Custom URL actions on the Prompt component

You can now point <Prompt> actions at any AI tool, not just Cursor, Claude, and ChatGPT. Send readers to Perplexity, your own internal AI assistant, or any other URL.

Generate a TypeScript SDK

Generate a TypeScript SDK from my OpenAPI spec. Follow the [TypeScript SDK quickstart](https://buildwithfern.com/learn/sdks/generators/typescript/quickstart.md).

Markdown

1 <Prompt
2   title="Generate a TypeScript SDK"
3   actions={[
4     { label: "Open in Perplexity", url: "https://www.perplexity.ai/search?q={prompt}", icon: "magnifying-glass" },
5     "cursor"
6   ]}
7 >
8 Generate a TypeScript SDK from my OpenAPI spec. Follow the [TypeScript SDK quickstart](https://buildwithfern.com/learn/sdks/generators/typescript/quickstart.md).
9 </Prompt>

Read the docs

1	<Prompt
2	title="Generate a TypeScript SDK"
3	actions={[
4	{ label: "Open in Perplexity", url: "https://www.perplexity.ai/search?q={prompt}", icon: "magnifying-glass" },
5	"cursor"
6	]}
7	>
8	Generate a TypeScript SDK from my OpenAPI spec. Follow the [TypeScript SDK quickstart](https://buildwithfern.com/learn/sdks/generators/typescript/quickstart.md).
9	</Prompt>