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Choose a Trigger

Choose an Action

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1. Choose trigger event

2. Choose action

1. Select the event

Setup

Test

App

Trigger event

Choose a trigger event

Choose a trigger

A trigger is the event that starts your Zap—like a "Checking/Savings Account Balance Update" from Mercury.

Add your action

An action happens after the trigger—such as "Send Letter" in Lob.

You’re connected!

Zapier seamlessly connects Mercury and Lob, automating your workflow.

Supported triggers and actions

Zapier helps you create workflows that connect your apps to automate repetitive tasks. A trigger is an event that starts a workflow, and an action is an event a Zap performs.

Checking/Savings Account Balance Update
Triggers when an account's balance changes.
Trigger
Instant
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Failed Transaction
Triggers when a transaction fails.
Trigger
Instant
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Settled Transaction
Triggers when a transaction settles.
Trigger
Instant
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- Description
- File
  Required
- Color
  Required
- Address Placement
- Double Sided
- To Name
- To Address Company
- To Address Line 1
  Required
- To Address Line 2
- To Address City
- To Address State
- To Address Zip
- To Address Country
- From Address Name
- From Address Company
- From Address Line 1
  Required
- From Address Line 2
- From Address City
  Required
- From Address State
  Required
- From Address Zip
  Required
- Mail Type
- Return Envelope
- Custom Envelope
- Perforated Page
- Extra Service
- Send Date
- Use Type
  Required
- Idempotency Key
- QR Code Position
- QR Code Redirect URL
- QR Code Width
- QR Code Top
- QR Code Right
- QR Code Left
- QR Code Bottom
- QR Code Pages
- QR Code Logo URL
- QR Code Background Color
- QR Code Foreground Color
Action
Write
- Description
- Size
- Inside File for Self-Mailer
  Required
- Outside File for Self-Mailer
  Required
- To Address Name
- To Address Company
- To Address Line 1
  Required
- To Address Line 2
- To Address City
  Required
- To Address State
  Required
- To Address Zip
  Required
- From Address Name
- From Address Company
- From Address Line 1
- From Address Line 2
- From Address City
- From Address State
- From Address Zip
- Mail Type
- Send Date
- Use Type
  Required
- Idempotency Key
- QR Code Position
- QR Code Redirect URL
- QR Code Width
- QR Code Top
- QR Code Right
- QR Code Left
- QR Code Bottom
- QR Code Pages
- QR Code Logo URL
- QR Code Background Color
- QR Code Foreground Color
Action
Write

- Single Line US Address
  Required
Action
Write

Cancelled Transaction
Triggers when a transaction is cancelled.
Trigger
Instant
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New Transaction
Triggers when a new transaction is created on any bank account (eg. Checking or Savings). Optionally, can also include any Credit account (eg. Physical/Virtual Credit or Debit). This trigger fires before the transaction settles.
Trigger
Instant
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Transaction Update
Triggers when a transaction changes status. This will trigger on any update to a transaction, including revisions to the amount following settlement, such as in the case of tips for service staff.
Trigger
Instant
Try It
- Description
- Size
- Front File for Postcard
  Required
- Back File for Postcard
  Required
- To Address Name
- To Address Company
- To Address Line 1
  Required
- To Address Line 2
- To Address City
- To Address State
- To Address Zip
- To Address Country
- From Address Name
- From Address Company
- From Address Line 1
- From Address Line 2
- From Address City
- From Address State
- From Address Zip
- Mail Type
- Send Date
- Use Type
  Required
- Idempotency Key
- QR Code Position
- QR Code Redirect URL
- QR Code Width
- QR Code Top
- QR Code Right
- QR Code Left
- QR Code Bottom
- QR Code Pages
- QR Code Logo URL
- QR Code Background Color
- QR Code Foreground Color
Action
Write
- Recipient
- Primary Line
  Required
- Secondary Line
- City
- State
- Postal Code
- Country
  Required
Action
Write
- Recipient
- Primary Line
  Required
- Secondary Line
- Urbanization
- City
- State
- Zip Code
Action
Write

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Customers have created over 25 million Zaps on the platform

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The average user takes less than 6 minutes to set up a Zap

Connect Mercury and Lob to integrate crucial parts of your business

With Zapier, you can integrate everything from basic data entry to end-to-end processes. Here are some of the business-critical workflows that people automate with Zapier.

Automate your lead management and improve conversions

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Automate your way to actionable, up-to-date data

The days of manually exporting and importing data are over. With Zapier, you can send data where it needs to go, in the format you need it—so you can centralize your data and unlock more insights.

Resolve incidents faster with automation

Your technical support team wants to focus on tech tickets rather than admin work. With Zapier, you can automate everything from ticket creation to routing to inter-team communication—eliminating friction from incident management and increasing speed to resolution.

Make work flow with AI

Level up your Mercury to Lob integration with AI. Extract, summarize, and transform your integration data with leading AI models like OpenAI, Anthropic, and more.

Learn about AI automation

About Mercury

Mercury is an online financial platform that helps startups grow and manage their capital.

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Related categories

Accounting

About Lob

Lob makes it easy to seamlessly print and mail letters, postcards, photos, posters and more via a web API.