This article provides a complete, practical walkthrough of the Http Keap Create Webhook n8n agent. It connects HTTP Request, Webhook across approximately 1 node(s). Expect a Intermediate setup in 15-45 minutes. One‑time purchase: €29.

What This Agent Does

This agent orchestrates a reliable automation between HTTP Request, Webhook, handling triggers, data enrichment, and delivery with guardrails for errors and rate limits.

It streamlines multi‑step processes that would otherwise require manual exports, spreadsheet cleanup, and repeated API requests. By centralizing logic in n8n, it reduces context switching, lowers error rates, and ensures consistent results across teams.

Typical outcomes include faster lead handoffs, automated notifications, accurate data synchronization, and better visibility via execution logs and optional Slack/Email alerts.

How It Works

The workflow uses standard n8n building blocks like Webhook or Schedule triggers, HTTP Request for API calls, and control nodes (IF, Merge, Set) to validate inputs, branch on conditions, and format outputs. Retries and timeouts improve resilience, while credentials keep secrets safe.

Third‑Party Integrations

• HTTP Request
• Webhook

Import and Use in n8n

1. Open n8n and create a new workflow or collection.
2. Choose Import from File or Paste JSON.
3. Paste the JSON below, then click Import.
4. Show n8n JSON

   Title:  
   Automating Address Verification in Keap with n8n and Lob API
   
   Meta Description:  
   Learn how to automatically verify mailing addresses for new contacts in Keap using n8n and the Lob API. This practical workflow ensures data accuracy, saves time, and triggers custom automations based on address deliverability.
   
   Keywords:  
   Keap automation, address verification workflow, n8n tutorial, Lob API, CRM address validation, automated tagging, API integration, contact management, deliverable address automation, address quality control
   
   Third-Party APIs Used:  
   - Lob API (https://www.lob.com): Used to verify the validity and deliverability of mailing addresses in the U.S.
   - Keap (https://keap.com): CRM platform where contact tags are applied based on address deliverability.
   
   —
   
   Article:
   
   Automating Address Verification in Keap with n8n and Lob API
   
   Clean, deliverable mailing addresses are essential for smooth customer communication and successful marketing campaigns. But with data entry happening manually, it's easy for contact records in your CRM to include typos or incomplete information.
   
   To combat this issue, many small business owners and marketers are embracing workflow automation to verify mailing addresses before using them for print mailings or compliance purposes. In this article, we’ll walk you through an automation using n8n, a powerful workflow automation tool, to verify contact mailing addresses in Keap using the Lob address verification API. The result? Cleaner data, fewer failed deliveries, and better customer interactions.
   
   ✅ Why Automate Address Verification?
   
   Whenever a new contact is added to Keap—either manually or through a form—you want to ensure that the mailing address is accurate and deliverable. With this automation:
   - Deliverable addresses are tagged in Keap.
   - Non-deliverable addresses are flagged for further review or correction.
   - Your team is notified or triggered into action without manual checks.
   
   🎯 Workflow Overview
   
   This n8n workflow is designed to do one thing really well: verify contact addresses via a webhook trigger and update the contact record in Keap based on the result.
   
   Let’s break down how it works:
   
   1. 📥 Webhook Trigger from Your CRM
   The first step is a webhook node in n8n that listens for incoming contact data from your CRM (in this case, Keap). When you add or update a contact, the contact information—including address, city, state, and ZIP code—is sent to this webhook.
   
   2. 🧾 Set Address Fields
   The address fields received are normalized using the “Set” node, ensuring they are ready for API submission. This includes the main address line, secondary line (like apartment/suite), city, state, and ZIP code.
   
   3. 🔗 Call to Lob API for Address Verification
   Next, the workflow sends the contact's address to Lob's /us_verifications endpoint. Lob responds with information about whether the address is deliverable, standardized formatting, and any necessary corrections.
   
   To use Lob, you’ll need to:
   - Sign up at https://www.lob.com/pricing
   - Generate an API key (https://help.lob.com/account-management/api-keys)
   - Add it to your HTTP Request node in n8n using Basic Auth
   
   4. 🔄 Conditional Logic to Detect Deliverability
   A “Switch” node evaluates the deliverability flag returned from Lob’s API. Depending on whether the status is "deliverable" or not, the workflow will follow one of two paths.
   
   5. 🟢 Deliverable Address? Apply “Deliverable” Tag in Keap
   If the address is marked as deliverable, n8n applies a custom tag in Keap (e.g., “Mailing Address Deliverable”) using Keap’s contact tag API. This tag can be used for filtering, triggers, and reporting.
   
   6. 🔴 Not Deliverable? Apply a Different Tag
   If the address is not deliverable, the automation tags the contact in Keap as “Mailing Address NOT Deliverable.” This tag could automatically start a separate workflow to notify your team or send an email/SMS to the contact asking for a corrected address.
   
   🛠 Customization Options
   
   You can expand this basic workflow to:
   - Trigger follow-up sequences or tasks for your team based on tagging.
   - Send Slack or email alerts when bad addresses are detected.
   - Store verified address formatting back into Keap.
   
   📌 Pro Tip
   
   Include a human review loop for undeliverable addresses. Some addresses may fail due to formatting errors or new construction locations not yet in USPS data. A manual follow-up automation can help resolve these edge cases.
   
   📹 For a quick visual walkthrough, check out this video tutorial:
   https://www.youtube.com/watch?v=YyIpQw5gyhk
   
   🎉 Conclusion
   
   Automating address verification is an excellent example of how n8n can bridge the gap between your CRM (Keap) and powerful APIs like Lob. With just a few nodes:
   - You reduce failed mailings
   - Catch typos and errors early
   - Create cleaner, more trustworthy CRM data
   
   As your contact list grows, maintaining data quality through automation becomes a necessity—not just a nice-to-have. This n8n + Lob integration is a perfect place to start.

5. Set credentials for each API node (keys, OAuth) in Credentials.
6. Run a test via Execute Workflow. Inspect Run Data, then adjust parameters.
7. Enable the workflow to run on schedule, webhook, or triggers as configured.

Tips: keep secrets in credentials, add retries and timeouts on HTTP nodes, implement error notifications, and paginate large API fetches.

Validation: use IF/Code nodes to sanitize inputs and guard against empty payloads.

Why Automate This with AI Agents

AI‑assisted automations offload repetitive, error‑prone tasks to a predictable workflow. Instead of manual copy‑paste and ad‑hoc scripts, your team gets a governed pipeline with versioned state, auditability, and observable runs.

n8n’s node graph makes data flow transparent while AI‑powered enrichment (classification, extraction, summarization) boosts throughput and consistency. Teams reclaim time, reduce operational costs, and standardize best practices without sacrificing flexibility.

Compared to one‑off integrations, an AI agent is easier to extend: swap APIs, add filters, or bolt on notifications without rewriting everything. You get reliability, control, and a faster path from idea to production.

Best Practices

• Credentials: restrict scopes and rotate tokens regularly.
• Resilience: configure retries, timeouts, and backoff for API nodes.
• Data Quality: validate inputs; normalize fields early to reduce downstream branching.
• Performance: batch records and paginate for large datasets.
• Observability: add failure alerts (Email/Slack) and persistent logs for auditing.
• Security: avoid sensitive data in logs; use environment variables and n8n credentials.

FAQs

Can I swap integrations later? Yes. Replace or add nodes and re‑map fields without rebuilding the whole flow.

How do I monitor failures? Use Execution logs and add notifications on the Error Trigger path.

Does it scale? Use queues, batching, and sub‑workflows to split responsibilities and control load.

Is my data safe? Keep secrets in Credentials, restrict token scopes, and review access logs.