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Notify Qualified Form Leads on Telegram

Verify form email addresses, check customer fit and notify a Telegram chat about qualified leads.

Verify a lead email, look up its customer fit and notify Telegram when its score is above 60.

Setup

In Open Flow connect Hunter and Telegram, set the destination chat in Notify Telegram, and create the secret Variable MADKUDU_AUTHORIZATION containing the word Basic and a space followed by base64 of your API key and a colon for Look up customer fit. Configure a form or client to POST JSON such as {“email”:“lead@example.com”} to the workflow webhook. In n8n configure the form, Hunter and Telegram credentials, the chat ID and HTTP Basic credentials with your MadKudu legacy API key as username and an empty password. Activate one format.

Behavior

Each submission receives one Hunter assessment. Only the status valid proceeds to MadKudu; only a customer fit score strictly above 60 sends a Telegram message with the email and fit signals. Hunter pending or malformed results and API failures stop without a message. A form submission or webhook acknowledgment does not guarantee processing or notification. The APIs receive the submitted email; restrict access to the webhook and execution history. A failed or uncertain Telegram send may already have succeeded, so check the chat before retrying. No automatic retries or deduplication are added.

Inspiration & credits

Changes to the source

Open Flow accepts JSON through a webhook; n8n retains the hosted form. Configure a form client separately for Open Flow.
Replace the private destination and credentials; use the documented MadKudu Basic authentication and validate service responses before sending. Support the documented top_signals_formated field as well as the source spelling top_signals_formatted.

Adapted from Get a Telegram alert when a great lead submits form with MadKudu and Hunter in Zie619/n8n-workflows. The matching n8n listing credits mutasem. The original template does not state a separate license.

The collection’s MIT notice is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see repository licensing.

MIT License

Copyright (c) 2025 Zie619

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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