# Zoom Web SDK “Signature is invalid” 3712 error code **URL:** \ **Category:** API and Webhooks\ **Created:** [January 17, 2022, 8:39pm UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785 "2022-01-17T20:39:37Z")\ **Posts on this page:** 6\ **Page:** 1

**Author:** ![stahl](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/stahl/32/34181_2.png) [@stahl](https://devforum.zoom.us/u/stahl)\ **Post date:** [January 17, 2022, 8:39pm UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785/1 "2022-01-17T20:39:37Z")

**Description** We create a sample script, how it is described on [https://marketplace.zoom.us/docs/sdk/native-sdks/web/signature](https://marketplace.zoom.us/docs/sdk/native-sdks/web/signature) but cannot join, we always became an error with signature. We also try to use the described service, to generate a signature, but also the same issue. **Error** 1. {method: “join”, status: false, result: “Invalid signature.”, errorMessage: undefined, errorCode: 3712} 2. errorCode: 3712 3. errorMessage: undefined 4. method: “join” 5. result: “Invalid signature.” **Which App Type (OAuth / Chatbot / JWT / Webhook)?** JWT **Which Endpoint/s?** Web SDK 2.1.1 **How To Reproduce (If applicable)** ```auto ``` **Screenshots (If applicable)** No **Additional context** Here you have an example signature, generated right now 18.01.2022 08:07 (Zurich) ---

**Author:** ![stahl](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/stahl/32/34181_2.png) [@stahl](https://devforum.zoom.us/u/stahl)\ **Post date:** [January 19, 2022, 3:22pm UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785/2 "2022-01-19T15:22:00Z")

@tommy I read your the expert in signature issues 🙂 possible you can help us? ---

**Author:** ![donte.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/donte.zoom/32/24412_2.png) [@donte.zoom](https://devforum.zoom.us/u/donte.zoom)\ **Post date:** [January 20, 2022, 2:15am UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785/3 "2022-01-20T02:15:53Z")

Greeting, @stahl, Welcome to the Developer Forum and thank you for posting. Can verify that you are using your API Key and Secret from your [JWT App](https://marketplace.zoom.us/docs/guides/auth/jwt) for your credentials. Also, you want to make sure that your server is using a UTC timezone when generating the signature. You reference our documentation for instructions on how to generate the Web SDK signature as well: > **[Generate Signature - Web - Meeting SDKs - Zoom Software Development Kit (Zoom...](https://marketplace.zoom.us/docs/sdk/native-sdks/web/signature)** > > Generate Signature > > > > Each request to start or join a Zoom Meeting or Webinar must be verified by an encrypted signature authorizing each user to enter.... You can also reference the Signature Generator Sample app to compare a working [signature](https://marketplace.zoom.us/docs/sdk/native-sdks/web/build/signature) with yours: > **[GitHub - zoom/meetingsdk-sample-signature-node.js: Generate a signature to...](https://github.com/zoom/meetingsdk-sample-signature-node.js)** > > Generate a signature to Start and Join Meetings and Webinars with the Zoom Web Meeting SDK. - GitHub - zoom/meetingsdk-sample-signature-node.js: Generate a signature to Start and Join Meetings and ... Let me know if this helps. Best, Donte ---

**Author:** ![stahl](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/stahl/32/34181_2.png) [@stahl](https://devforum.zoom.us/u/stahl)\ **Post date:** [January 20, 2022, 8:22am UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785/4 "2022-01-20T08:22:00Z")

hi @donte.zoom thank you for your feedback. My Issue was, that we need to generate the signature quick before join process. so you can close this issue ---

**Author:** ![MaxM](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maxm/32/42303_2.png) [@MaxM](https://devforum.zoom.us/u/MaxM)\ **Post date:** [January 25, 2022, 12:09am UTC](https://devforum.zoom.us/t/zoom-web-sdk-signature-is-invalid-3712-error-code/62785/5 "2022-01-25T00:09:32Z")

@stahl Thanks for following up and sharing your solution ---

Closed on January 25, 2022, 12:09am UTC