How to create gitlab merge request in GitLab

Create GitLab Merge Request in GitLab — start free

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Project ID or Path project_id	string	Required	Project ID or Path. Example: 123
Title title	string	Required	Title. Example: Fix login redirect
Source Branch source_branch	string	Required	Source Branch. Example: fix/login
Target Branch target_branch	string	Required	Target Branch. Example: main
Description description	string	Optional	Description
Assignee User ID assignee_id	string	Optional	Assignee User ID. Example: 5
Labels labels	string	Optional	Labels. Example: bug, review

Sample request

{
  "project_id": "e.g. 123",
  "title": "e.g. Fix login redirect",
  "source_branch": "e.g. fix/login",
  "target_branch": "e.g. main",
  "description": "{{trigger.description}}"
}

Returns

{
  "iid": 1,
  "state": "opened",
  "title": "Fix login",
  "web_url": "https://gitlab.com/group/project/-/merge_requests/1"
}

Use these fields in downstream nodes for routing, logging, or error handling.

FAQ

Questions about Create GitLab Merge Request.

What does the Create GitLab Merge Request action do in GitLab?

Opens a new MR from source branch to target branch with title, description, reviewers, labels. For automation that auto-creates MRs from generated branches (dependabot-style).

What inputs does Create GitLab Merge Request require?

Required: Project ID or Path, Title, Source Branch, Target Branch. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if GitLab returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Create GitLab Merge Request support batch operations?

Yes. Run Create GitLab Merge Request inside a Loop node to process arrays. TinyCommand handles GitLab's rate limits automatically so you don't have to throttle manually.

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