1Password MCP Server
for AI Agents
Connect your AI agent to StackOne's 1Password MCP server and give it 24 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
24 Agent Actions
Create, read, update, and delete across 1Password — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your 1Password MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every 1Password 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 1Password call.
Tools Discovery →What is the 1Password MCP Server?
A 1Password MCP server lets AI agents read and write 1Password data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's 1Password MCP server ships with 24 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All 1Password MCP Tools
Every action from 1Password's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Unified Groups
- List Unified Groups
List unified groups in 1Password.
- Get Unified Group
Get a unified 1Password group by ID.
Unified Roles
- List Unified Roles
List unified roles in 1Password.
- Get Unified Role
Get a unified 1Password role by ID.
Unified Users
- List Unified Users
List unified users in 1Password.
- Get Unified User
Get a unified 1Password user by ID.
Items
- Create Item
Create a new item in a vault
- List Items
Retrieve all items within a specific vault
- Get Item
Retrieve detailed information about a specific item
- Delete Item
Delete an item from a vault
Vaults
- List Vaults
Retrieve all vaults accessible by the Connect server
- Get Vault
Retrieve detailed information about a specific vault
Other (12)
- List API Activity
Retrieve API request activity logs from the Connect server
- List Files
Retrieve all files attached to an item
- Get File Details
Retrieve metadata and optionally content of a specific file
- Download File Content
Download the binary content of a file
- Get Heartbeat
Check if the Connect server is alive and responsive
- Get Server Health
Retrieve Connect server health status and dependencies
- Get Prometheus Metrics
Retrieve Prometheus metrics from the Connect server
- Get Unified Credentials
Get the current 1Password connection's unified credentials and identity.
- List Unified Resource Users
List unified resource users in 1Password.
- List Unified Resource Types
List unified resource types in 1Password.
- Update A Subset Of Item Attributes
Partially update item attributes using JSON Patch operations
- Replace Item
Replace an existing item with new data
Set Up Your 1Password MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to 1Password in under 10 lines of code.
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>"
]
}
}
}Check More Security MCP Servers
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Platform 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
MCP vs A2A: Architecture, Security, and When to Use Each
MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.
12 min
MCP vs API: What 200+ Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building 200+ connectors that serve both, here's when each approach wins.
14 min read
1Password MCP Server FAQ
Does StackOne have a 1Password MCP server?
1Password MCP server vs direct API integration — what's the difference?
How does 1Password authentication work for AI agents?
origin_owner_id.Are 1Password MCP tools vulnerable to prompt injection?
What is the context bloat of a 1Password agent and how do I avoid it?
Can I limit which actions my 1Password agent can access?
Can I create custom agent actions for my 1Password MCP server?
When should I NOT use a 1Password MCP server?
What AI frameworks and AI clients does the StackOne 1Password MCP server support?
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.