# 
New Doppler SDK & Demo App Now Available 

*It’s never been easier to build customized capital markets*

By [The Sharpening Block](https://paragraph.com/@whetstone) · 2025-09-02

doppler, typescript, sdk

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Doppler now has a new TypeScript SDK that makes it easier than ever to build application specific custom markets. This improved SDK provides a unified interface between Doppler’s static (v3) and dynamic (v4) bonding curves, making changing versions as simple as changing a few lines of code that map to inputs within the Doppler smart contracts, and no longer separate packages.

With an intuitive API interface and familiar builder pattern, developers now get configuration specific errors related to their Doppler launches. This helps ensure integrators are implementing a valid configuration such as their auction parameters, migration destinations, and governance contracts.

**_Now available in alpha on the following test networks: Base, Ink, Unichain, Arbitrum, and Monad._**

SDK Examples
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Configure token metadata and auction details

![](https://storage.googleapis.com/papyrus_images/3f67ba1df5ae08808dfe39551ce6283d.png)

Doppler SDK Token Creation

Configure (optional) governance

![](https://storage.googleapis.com/papyrus_images/94b1f7168c22dc50939ddb73e9b80fd1.png)

Doppler SDK Governance Configuration

Configure (optional) vesting

![](https://storage.googleapis.com/papyrus_images/66cb5a02c5e3ec97f788d436dcd604dc.png)

Doppler SDK Vesting Configuration

Configure post auction AMM migration

![](https://storage.googleapis.com/papyrus_images/63c21d7fbb6e4bd527f7702a04c7f6d8.png)

Doppler SDK Migration Configuration

Give SDK feedback
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The Doppler SDK is open source and now available in alpha. Feedback is greatly appreciated ![](https://cdn.jsdelivr.net/npm/emoji-datasource-apple/img/apple/64/2665-fe0f.png)

Please file issues within the GitHub repository or [join Discord](https://discord.gg/JcrH65zXK3) and send us a message ![](https://cdn.jsdelivr.net/npm/emoji-datasource-apple/img/apple/64/1f44b.png)

New demo application now available
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A new open source demo application written in react implementing the latest SDK is now available, showcasing just how easy it is to get started building applications with Doppler.

![](https://storage.googleapis.com/papyrus_images/2d8b30fe44dd74008ee2b21307e5c190.png)

Doppler Demo Application

View the code: [https://github.com/whetstoneresearch/doppler-demo-app](https://github.com/whetstoneresearch/doppler-demo-app)

Get in touch
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Interested in building with Doppler or having Doppler deployed to your network? You can permissionlessly get started today, documentation and contract addresses are available [here](https://docs.doppler.lol/) ![](https://cdn.jsdelivr.net/npm/emoji-datasource-apple/img/apple/64/1f448.png) If you’re interested in learning more, have questions, or are inquiring about a potential business collaboration, send an email to [contact@whetstone.cc](mailto:contact@whetstone.cc) ![](https://cdn.jsdelivr.net/npm/emoji-datasource-apple/img/apple/64/1f44b.png)

About Doppler 
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Doppler is a smart contract protocol developed by [Whetstone Research](https://whetstone.cc) to power custom token launches. It is used by industry leading applications like Zora, Paragraph, and Coop Records, enabling efficient application specific markets. Doppler is available on Base, Ink, and Unichain, with other Ethereum Virtual Machine (EVM) network deployments coming soon.

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*Originally published on [The Sharpening Block](https://paragraph.com/@whetstone/new-doppler-sdk-and-demo-app-now-available)*