Google Contacts MCP Server
for AI Agents
Connect your AI agent to StackOne's Google Contacts MCP server and give it 21 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
21 Agent Actions
Create, read, update, and delete across Google Contacts — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Google Contacts MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Google Contacts 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 Google Contacts call.
Tools Discovery →What is the Google Contacts MCP Server?
A Google Contacts MCP server lets AI agents read and write Google Contacts data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Google Contacts MCP server ships with 21 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 Google Contacts MCP Tools
Every action from Google Contacts's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Contacts
- Create Contact
Create a new contact
- List Contacts
List the authenticated user's contacts
- Get Contact
Get a single contact by resource name
- Search Contacts
Search the user's contacts
- Update Contact
Update an existing contact
- Batch Get Contacts
Get multiple contacts by resource names
- Batch Create Contacts
Create multiple contacts in a single request
- Batch Update Contacts
Update multiple contacts in a single request
- Batch Delete Contacts
Delete multiple contacts in a single request
- Delete Contact
Delete a contact
Contact Photos
- Update Contact Photo
Update a contact's photo
- Delete Contact Photo
Delete a contact's photo
Contact Groups
- Create Contact Group
Create a new contact group
- List Contact Groups
List all contact groups owned by the authenticated user
- Get Contact Group
Get a specific contact group by resource name
- Update Contact Group
Update an existing contact group
- Delete Contact Group
Delete an existing contact group
Modify Contact Group Members
- Modify Contact Group Members
Add or remove members from a contact group
Other Contacts
- List Other Contacts
List other contacts (automatically saved contacts)
- Search Other Contacts
Search other contacts by query
Other Contact To My Contacts
- Copy Other Contact To My Contacts
Copy an other contact into the user's My Contacts group
Google Contacts AI Agent Use Cases
Connect your AI agent to Google Contacts and help your team scale the sales operations they run by hand today.
Use StackOne to connect your AI agent to your CRM, email, and calendar tools to automate post-demo follow-up.
ViewUse StackOne to connect your AI agent to your CRM, email, and calendar tools to automate deal risk scoring and pipeline alerts.
ViewUse StackOne to connect your AI agent to your CRM, sales engagement, and messaging tools to automate outbound prospecting.
ViewSet Up Your Google Contacts MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Google Contacts 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 CRM 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
Google Contacts MCP Server FAQ
Does StackOne have a Google Contacts MCP server?
Google Contacts MCP server vs direct API integration — what's the difference?
How does Google Contacts authentication work for AI agents?
origin_owner_id.Are Google Contacts MCP tools vulnerable to prompt injection?
What is the context bloat of a Google Contacts agent and how do I avoid it?
Can I limit which actions my Google Contacts agent can access?
Can I create custom agent actions for my Google Contacts MCP server?
When should I NOT use a Google Contacts MCP server?
What AI frameworks and AI clients does the StackOne Google Contacts 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.