Connect
Optimize
Secure
Help Scout MCP Server
for AI Agents
Production-ready Help Scout MCP server with 36 extensible actions — plus built-in authentication, security, and optimized execution.
Help Scout MCP Server
Built by 
StackOne
StackOne 
Coverage
36 Agent Actions
Create, read, update, and delete across Help Scout — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Help Scout MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Help Scout 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 Help Scout call.
Tools Discovery →What is the Help Scout MCP Server?
A Help Scout MCP server lets AI agents read and write Help Scout data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Help Scout MCP server ships with 36 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 Help Scout MCP Tools and Actions
Every action from Help Scout's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Conversations
- Create Conversation
Create a new conversation in a mailbox with an initial thread.
- List Conversations
Retrieve a paginated list of conversations across one or more mailboxes.
- Get Conversation
Retrieve the full details of a single conversation by its ID.
- Update Conversation
Apply a single JSON Patch operation to update one field of a conversation.
- Delete Conversation
Permanently delete a conversation by its ID.
Customers
- Create Customer
Create a new customer record in Help Scout.
- List Customers
Retrieve a paginated list of customers with optional filters.
- Get Customer
Retrieve full profile details of a single customer by their ID.
- Update Customer
Apply one or more JSON Patch operations to update a customer record.
- Delete Customer
Permanently delete a customer record by its ID.
Mailbox Saved Replys
- Create Mailbox Saved Reply
Create a new saved reply in a mailbox.
- Get Mailbox Saved Reply
Retrieve a single saved reply by its ID.
- Update Mailbox Saved Reply
Update an existing saved reply in a mailbox.
- Delete Mailbox Saved Reply
Permanently delete a saved reply from a mailbox.
Tags
- List Tags
Retrieve a paginated list of all tags in the Help Scout account.
- Get Tag
Retrieve a single tag by its ID.
Users
- List Users
Retrieve a paginated list of all users (agents) in the Help Scout account.
- Get User
Retrieve the full profile of a specific user by their ID.
Other (18)
- Create Reply Thread
Add an outgoing reply to an existing conversation.
- Create Note Thread
Add an internal note to an existing conversation.
- List Conversation Threads
Retrieve all threads (messages, notes, replies) for a conversation.
- List Customer Emails
Retrieve all email addresses associated with a specific customer.
- List Customer Phones
Retrieve all phone numbers associated with a specific customer.
- List Mailboxes
Retrieve a list of all mailboxes in the Help Scout account.
- Get Mailbox
Retrieve details of a specific mailbox by its ID.
- List Mailbox Custom Fields
Retrieve all custom fields configured for a mailbox.
- List Mailbox Folders
Retrieve all folders within a specific mailbox.
- List Mailbox Saved Replies
Retrieve all saved replies for a mailbox.
- List Teams
Retrieve a paginated list of all teams in the Help Scout account.
- List Team Members
Retrieve all members of a specific team.
- List User Statuses
Retrieve the current availability status of all users in the Help Scout account.
- Get User Status
Retrieve the current availability status of a specific user.
- Get Current User
Retrieve the profile of the currently authenticated user or app.
- List Workflows
Retrieve a paginated list of all workflows in the Help Scout account.
- Update Conversation Tags
Replace all tags on a conversation with a new set of tags.
- Run Workflow
Manually trigger a manual workflow on one or more conversations.
Set Up Your Help Scout MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Help Scout 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>"
]
}
}
}More Customer Support MCP Servers
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Help Scout 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
Help Scout MCP Server FAQ
Help Scout MCP server vs direct API integration — what's the difference?
A Help Scout MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Help Scout. A Help Scout 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 Help Scout at runtime. StackOne provides both.
How does Help Scout authentication work for AI agents?
Help Scout 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 Help Scout account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are Help Scout MCP tools vulnerable to prompt injection?
Yes — Help Scout 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 Help Scout agent and how do I avoid it?
Context bloat happens when Help Scout tool schemas and API responses eat your Help Scout agent's memory, preventing it from reasoning effectively. A single Help Scout 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 Help Scout agent can access?
Yes — you can limit which actions your Help Scout 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 Help Scout MCP server?
Yes — you can create custom agent actions for your Help Scout MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Help Scout's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Help Scout MCP server?
Skip a Help Scout MCP server if your integration is purely software-to-software — direct Help Scout 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 Help Scout actions at runtime.
What AI frameworks and AI clients does the StackOne Help Scout MCP server support?
The StackOne Help Scout 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.