For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Logo
Resources
Log inGet a demo
Get startedAPI referenceImplementation
Get startedAPI referenceImplementation
  • Authentication
    • Merge Link
    • Prompt guide for Merge Link
    • Magic Link
    • Single integration
  • Reading data
    • Syncing best practices
  • Supplemental data
    • Overview
    • Remote Data
    • Custom objects
  • Writing data
    • Overview
  • Platform and account metadata
    • Integration metadata
    • Linked Accounts
  • Testing
    • Testing Merge's Unified API via Postman
  • Specifications
    • Schema properties
    • Model Context Protocol (MCP)
UnifiedAgent HandlerGateway
UnifiedAgent HandlerGateway
Resources
Log inGet a demo
On this page
  • Your Journey to Writes
  • Basic Writes
  • Advanced Writes
Writing data

Overview

These guides cover how to write data to third-party platforms

Was this page helpful?
Previous

Custom Objects

Next

Writes

Built with

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.

Making Writes

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

Related and Nested Objects

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.

Programmatic writes with /meta

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

Programmatic nested writes with /meta

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

Templates and conditional fields

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