Fresh 2026

Overview

Overview of writing data through Merge. Links to guides on POST/PATCH requests, the /meta endpoint, related writes, nested writes, and conditional fields.

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Your Journey to Writes

For convenience, we've broken up the journey of learning how to write data to third-party platforms into Basic and Advanced topics.

Basic Writes

In our Basic topics, we introduce universal concepts that allow you to execute writes for most, but not all, third-party platforms and Linked Accounts.

Make POST requests to Merge to write data to third-party platforms

Write data to third-party platforms with relations to existing and new Common Model instances

Writes are unified across all of our third-party platforms. However, some platforms require an additional piece of Merge's advanced functionality, explored in Advanced Writes below, to support them.

Advanced Writes

In our Advanced topics, we introduce programmatic concepts that make heavy use of an endpoint we call /meta to handle writes for all third-party platforms and Linked Accounts.

Use /meta to programmatically form and validate POST requests to write standardized or integration / Linked Account-specific model fields

Use /meta to create related Common Model instances (through nesting) with standardized or integration / Linked Account-specific fields

Use /meta to determine which specific model fields are available based on your user's input in another field