Connect
Optimize
Secure
GitLab MCP Server
for AI Agents
Production-ready GitLab MCP server with 125 extensible actions — plus built-in authentication, security, and optimized execution.
GitLab MCP Server
Built by 
StackOne
StackOne 
Coverage
125 Agent Actions
Create, read, update, and delete across GitLab — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your GitLab MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every GitLab tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every GitLab call.
Tools Discovery →What is the GitLab MCP Server?
A GitLab MCP server lets AI agents read and write GitLab data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's GitLab MCP server ships with 125 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, and optimized agent context. Connect it from MCP clients like Claude Desktop, Cursor, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All GitLab MCP Tools and Actions
Every action from GitLab's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Projects
- Create Project
Create a new GitLab project
- List Projects
List all GitLab projects accessible to the authenticated user
- Get Project
Retrieve details of a specific GitLab project
- Update Project
Update settings and configuration of a GitLab project
- Delete Project
Delete a GitLab project
Project Members
- Add Project Member
Add a user as a member of a GitLab project
- List Project Members
List all members of a GitLab project
- Update Project Member
Update a project member's access level or expiration
- Remove Project Member
Remove a user from a GitLab project
Issues
- Create Issue
Create a new issue in a GitLab project
- Get Issue
Retrieve details of a specific issue in a GitLab project
- Update Issue
Update an existing issue in a GitLab project
- Move Issue
Move an issue to a different GitLab project
- Delete Issue
Delete an issue from a GitLab project
Issue Notes
- Create Issue Note
Add a comment (note) to a GitLab issue
- List Issue Notes
List all comments (notes) on a GitLab issue
Merge Requests
- Create Merge Request
Create a new merge request in a GitLab project
- Get Merge Request
Retrieve details of a specific merge request in a GitLab project
- Update Merge Request
Update an existing merge request in a GitLab project
Merge Request Notes
- Create Merge Request Note
Add a comment to a GitLab merge request
- List Merge Request Notes
List all comments on a GitLab merge request
Commits
- Create Commit
Create a commit with multiple file actions in a GitLab project
- List Commits
List commits in a GitLab project repository
- Get Commit
Retrieve details of a specific commit in a GitLab project
Branchs
- Create Branch
Create a new branch in a GitLab project repository
- Get Branch
Retrieve details of a specific branch in a GitLab project
- Delete Branch
Delete a branch from a GitLab project repository
Users
- Create User
Create a new GitLab user account (admin only)
- List Users
List all GitLab users accessible to the authenticated user
- Get User
Retrieve details of a specific GitLab user by ID
- Update User
Update an existing GitLab user account (admin only)
- Delete User
Delete a GitLab user account (admin only)
Groups
- Create Group
Create a new GitLab group
- List Groups
List all GitLab groups accessible to the authenticated user
- Get Group
Retrieve details of a specific GitLab group
- Update Group
Update settings and configuration of a GitLab group
- Delete Group
Schedule a GitLab group for deletion or permanently delete a subgroup
Group Members
- Add Group Member
Add a user as a member of a GitLab group
- List Group Members
List all members of a GitLab group
- Remove Group Member
Remove a user from a GitLab group
Pipelines
- Create Pipeline
Trigger a new pipeline for a GitLab project
- List Pipelines
List all pipelines for a GitLab project
- Get Pipeline
Retrieve details of a specific pipeline in a GitLab project
- Delete Pipeline
Delete a pipeline from a GitLab project
Files
- Create File
Create a new file in a GitLab project repository
- Get File
Retrieve a file from a GitLab project repository
- Update File
Update an existing file in a GitLab project repository
- Delete File
Delete a file from a GitLab project repository
Tags
- Create Tag
Create a new tag in a GitLab project repository
- List Tags
List all tags in a GitLab project repository
- Delete Tag
Delete a tag from a GitLab project repository
Project Labels
- Create Project Label
Create a new label in a GitLab project
- List Project Labels
List all labels in a GitLab project
- Get Project Label
Retrieve details of a specific label in a GitLab project
- Update Project Label
Update an existing label in a GitLab project
- Delete Project Label
Delete a label from a GitLab project
Project Milestones
- Create Project Milestone
Create a new milestone in a GitLab project
- List Project Milestones
List all milestones in a GitLab project
- Get Project Milestone
Retrieve details of a specific milestone in a GitLab project
- Update Project Milestone
Update an existing milestone in a GitLab project
- Delete Project Milestone
Delete a milestone from a GitLab project
Releases
- Create Release
Create a new release for a GitLab project
- List Releases
List all releases for a GitLab project
- Get Release
Retrieve details of a specific release in a GitLab project
- Update Release
Update an existing release in a GitLab project
- Delete Release
Delete a release from a GitLab project
Environments
- Create Environment
Create a new deployment environment for a GitLab project
- List Environments
List all deployment environments for a GitLab project
- Get Environment
Retrieve details of a specific deployment environment in a GitLab project
- Update Environment
Update a deployment environment in a GitLab project
Snippets
- Create Snippet
Create a new GitLab snippet
- List Snippets
List all snippets for the authenticated GitLab user
- Get Snippet
Retrieve details of a specific GitLab snippet
- Update Snippet
Update an existing GitLab snippet
- Delete Snippet
Delete a GitLab snippet permanently
Project CI/CD Variables
- Create Project CI/CD Variable
Create a new CI/CD variable for a GitLab project
- List Project CI/CD Variables
List all CI/CD variables for a GitLab project
- Get Project CI/CD Variable
Retrieve a specific CI/CD variable from a GitLab project
- Update Project CI/CD Variable
Update an existing CI/CD variable in a GitLab project
- Delete Project CI/CD Variable
Delete a CI/CD variable from a GitLab project
Project Deploy Keys
- Add Project Deploy Key
Add a deploy key to a GitLab project
- List Project Deploy Keys
List all deploy keys for a GitLab project
- Delete Project Deploy Key
Remove a deploy key from a GitLab project
Namespaces
- List Namespaces
List all namespaces accessible to the authenticated GitLab user
- Get Namespace
Retrieve details of a specific GitLab namespace
Other (40)
- List Project Issues
List all issues in a specific GitLab project
- List Issue Participants
List all users participating in a GitLab issue
- List Related Merge Requests
List all merge requests related to a GitLab issue
- List Project Merge Requests
List all merge requests for a specific GitLab project
- List Merge Request Commits
List all commits in a GitLab merge request
- List Merge Request Diffs
List diffs of files changed in a GitLab merge request
- Get Merge Request Participants
Retrieve all participants in a GitLab merge request
- Get Commit Diff
Get the diff of changes introduced by a specific commit
- List Branches
List all branches in a GitLab project repository, sorted alphabetically
- Get Current User
Retrieve the authenticated user's profile information
- Get Current User Status
Retrieve the status of the authenticated user
- Get User Status
Retrieve the status of a specific GitLab user
- List Group Projects
List all projects belonging to a GitLab group
- List Group Subgroups
List visible direct subgroups of a GitLab group
- Get Pipeline Variables
Retrieve variables of a specific pipeline in a GitLab project
- List Pipeline Jobs
List all jobs in a specific GitLab pipeline
- Get Job
Retrieve details of a specific CI/CD job in a GitLab project
- Get Job Log
Retrieve the log output of a CI/CD job in a GitLab project
- List Repository Tree
List files and directories in a GitLab project repository
- Get Repository Contributors
Retrieve the list of contributors for a GitLab project repository
- Search Globally
Search across all accessible GitLab resources
- Search In Group
Search within a specific GitLab group and its subgroups
- Search In Project
Search within a specific GitLab project
- Fork Project
Fork a GitLab project into a namespace
- Archive Project
Archive a GitLab project to make it read-only
- Unarchive Project
Unarchive a GitLab project to restore full access
- Merge Merge Request
Accept and merge a GitLab merge request
- Rebase Merge Request
Automatically rebase the source branch of a merge request against its target branch
- Approve Merge Request
Approve a GitLab merge request
- Cancel Auto-Merge
Cancel the auto-merge setting on a GitLab merge request
- Cherry-Pick Commit
Cherry-pick a commit onto a target branch in a GitLab project
- Revert Commit
Revert a commit in a GitLab project branch
- Protect Branch
Add branch protection rules to a GitLab project branch
- Unprotect Branch
Remove branch protection rules from a GitLab project branch
- Retry Pipeline
Retry failed or canceled jobs in a GitLab pipeline
- Cancel Pipeline
Cancel all jobs for a running pipeline in a GitLab project
- Retry Job
Retry a CI/CD job in a GitLab project
- Compare Branches
Compare two branches, tags, or commits in a GitLab project
- Stop Environment
Stop a running deployment environment in a GitLab project
- Enable Project Deploy Key
Enable an existing deploy key for a GitLab project
Set Up Your GitLab MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to GitLab in under 10 lines of code.
MCP Clients
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
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GitLab MCP Server Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
GitLab MCP Server FAQ
GitLab MCP server vs direct API integration — what's the difference?
A GitLab MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling GitLab. A GitLab MCP server is for AI agents — MCP clients like Claude and Cursor, plus framework agents built with OpenAI, LangChain, or Vercel AI — discovering and calling GitLab at runtime. StackOne provides both.
How does GitLab authentication work for AI agents?
GitLab authentication for AI agents works through a StackOne Connect Session. Create one via the dashboard or the SDK — you get an auth link and ready-to-paste config for Claude Desktop, Cursor, and other MCP clients. Your user authenticates their own GitLab account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are GitLab MCP tools vulnerable to prompt injection?
Yes — GitLab MCP tools can be vulnerable to indirect prompt injection. Any tool that reads user-written content — documents, messages, tickets, records, or free-text fields — is a potential vector. StackOne Defender scans every tool response before it enters the agent's context — regex patterns in ~1ms, then a MiniLM classifier in ~4ms. 88.7% accuracy, CPU-only.
What is the context bloat of a GitLab agent and how do I avoid it?
Context bloat happens when GitLab tool schemas and API responses eat your GitLab agent's memory, preventing it from reasoning effectively. A single GitLab query can return a massive JSON response, and connecting multiple tools compounds the problem. Tools Discovery and Code Mode reduce context bloat — loading only relevant tools per query and keeping raw responses out of the agent's context.
Can I limit which actions my GitLab agent can access?
Yes — you can limit which actions your GitLab agent can access directly from the StackOne dashboard. Toggle actions on or off, or restrict them to specific accounts, with no code changes to your agent. Session tokens can be scoped to exact actions so if one leaks, exposure stays contained.
Can I create custom agent actions for my GitLab MCP server?
Yes — you can create custom agent actions for your GitLab MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research GitLab's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a GitLab MCP server?
Skip a GitLab MCP server if your integration is purely software-to-software — direct GitLab API integration is simpler when no AI agent is involved. For deterministic, compliance-critical operations (financial transactions, regulatory reporting), direct API gives you predictable behavior without agent-driven decision-making. MCP shines when AI agents need to dynamically discover and call GitLab actions at runtime.
What AI frameworks and AI clients does the StackOne GitLab MCP server support?
The StackOne GitLab MCP server supports both. MCP clients (paste-and-go apps): Claude Desktop, Claude Code, Cursor, VS Code, Goose. Agent frameworks (code SDKs you build with): OpenAI Agents SDK, Anthropic, Vercel AI, Google ADK, CrewAI, Pydantic AI, LangChain, LangGraph, Azure AI Foundry.
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.