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@@ -19665,7 +19664,7 @@ You'll explore a range of topics—from client-side apps and CLI tools to on-cha
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Learn how to integrate Polkadot APIs, use local or light clients, and interact with on-chain logic:
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- **[Polkadot API Account Watcher](/tutorials/dapps/papi-account-watcher/){target=\_blank}** – build a CLI that listens for on-chain `remarkWithEvent` extrinsics using the Polkadot API and light clients
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- **[Create Account Watcher with PAPI](/tutorials/dapps/remark-tutorial){target=\_blank}** – build a CLI that listens for on-chain `remarkWithEvent` extrinsics using the Polkadot API and light clients
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## In This Section
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description: Follow hands-on tutorials to build decentralized apps using the Polkadot API, including light clients, event listeners, and extrinsics.
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template: index-page.html
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---
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# Build with the Polkadot API (PAPI)
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This section features practical tutorials for building applications using the [Polkadot API](/develop/toolkit/api-libraries/papi){target=\_blank}. Learn how to connect to Polkadot SDK-based chains, listen to on-chain events, submit extrinsics, and build apps powered by light or full clients.
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To test the application, navigate to the [**Extrinsics** page of the PAPI Dev Console](https://dev.papi.how/extrinsics#networkId=westend&endpoint=light-client){target=\_blank}. Select the **System** pallet and the **remark_with_event** call. Ensure the input field follows the convention `address+email`. For example, if monitoring `5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY`, the input should be:
Submit the extrinsic and sign it using the Polkadot.js browser wallet. The CLI will display the following output and play the "You've Got Mail!" sound:
Copy file name to clipboardExpand all lines: tutorials/dapps/index.md
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Learn how to integrate Polkadot APIs, use local or light clients, and interact with on-chain logic:
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-**[Polkadot API Account Watcher](/tutorials/dapps/papi-account-watcher/){target=\_blank}** – build a CLI that listens for on-chain `remarkWithEvent` extrinsics using the Polkadot API and light clients
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-**[Create Account Watcher with PAPI](/tutorials/dapps/remark-tutorial){target=\_blank}** – build a CLI that listens for on-chain `remarkWithEvent` extrinsics using the Polkadot API and light clients
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