Zapier Gmail AI Memory: Persistent Memory for Gmail Zaps
Zapier Gmail Zaps process each email in isolation — no memory of previous emails from the same sender. retainr adds persistent per-sender memory via Webhooks by Zapier: search before the AI step, store after. No code. No database.
Create a free retainr account at retainr.dev/dashboard. Copy your API key. Takes 30 seconds.
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Add Webhooks GET to search sender history
Before the AI step in your Zap, add a Webhooks by Zapier GET action. URL: https://api.retainr.dev/v1/memories/search?namespace=email:{from_email}&q={subject}&limit=5. Header: Authorization: Bearer YOUR_KEY. Map results into your AI step.
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Add Webhooks POST to store each interaction
After the AI step, add a Webhooks by Zapier POST action. URL: https://api.retainr.dev/v1/memories. Body: namespace (email:{from_email}), content (email topic + AI response summary). Every sender builds a permanent memory record.
Zapier Gmail memory — frequently asked questions
Which Gmail Zapier trigger should I use for email memory?
Use the Gmail New Email trigger (fires on every new email) or New Email Matching Search (filter by label, sender, or subject). Both work identically with the retainr Webhooks steps. Map the From Email field to the namespace in both the search and store steps.
How do I inject retainr search results into my AI step?
The Webhooks GET response contains a results array. Map the content values to your AI system prompt field. If you need to join multiple results, add a Formatter by Zapier step that joins the array into a single text string before the AI step.
Can I build a Zapier AI email reply assistant with this?
Yes. The pattern: Gmail New Email trigger → Webhooks GET (search sender history) → OpenAI or Claude action (draft reply with history context) → Webhooks POST (store this exchange) → Gmail Send Email. The AI drafts replies that account for the full sender relationship.
What Zapier plan do I need?
Multi-step Zaps require Zapier Starter or above. The Gmail memory Zap needs at least 4 steps: Gmail trigger, Webhooks GET, AI action, Webhooks POST. Zapier Free only supports single-action Zaps.
Can I use this with Gmail labels to scope memory?
Yes. Add a Filter step after the Gmail trigger to only process emails with specific labels (e.g., customer support, leads). Use separate namespace prefixes for different email categories: support:{from_email} vs lead:{from_email} to keep memory pools separate.
Give your Zapier Gmail Zap real memory
1,000 memory operations per month. Free forever. No credit card required.