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Connect to everything your agents need, without writing the infrastructure to get there.

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Live 25 Actions

Hailey HR MCP Server
for AI Agents

Connect your AI agent to StackOne's Hailey HR MCP server and give it 25 MCP tools out of the box. Auth, tool execution, and security all managed.

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Hailey HR MCP Server
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Coverage

25 Agent Actions

Create, read, update, and delete across Hailey HR — and extend your agent's capabilities with custom actions.

MCP Actions → Build Actions →

Authentication

Agent Tool Authentication

Per-user OAuth in one call. Your Hailey HR MCP server gets session-scoped tokens with zero credentials stored on your infra.

Agent Auth →

Security

Agent Protection

Every Hailey HR 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 Hailey HR call.

Tools Discovery →

What is the Hailey HR MCP Server?

A Hailey HR MCP server lets AI agents read and write Hailey HR data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Hailey HR MCP server ships with 25 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 Hailey HR MCP Tools

Every action from Hailey HR's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.

Educations

  • Create Education

    Create an education in your company. Returns the ID of the created education.

  • Update Education

    Update an education in your company.

  • Delete Education

    Delete an education in your company.

Education Sessions

  • Create Education Session

    Add an education session.

  • List Education Sessions

    Get the education sessions in your company.

Employees

  • Create Employee

    Quick add an employee to your company.

  • List Employees

    Get a list of all employees in your company. The data included depends on the rights you have in Hailey.

  • Get Employee

    Fetch a single employee in your company by the ID of the employee.

Employments

  • List Employments

    Get a list of all employments in your company.

  • Get Employment

    Fetch a single employment in your company by the ID of the employment.

Other (15)

  • Get Company

    Get your company data, including locations, departments, titles, teams, and other master data.

  • List Company Certifications

    Get all certifications in your company.

  • List Company Salary Types

    Get the salary types in your company.

  • List Competences

    Get all competences in your company.

  • List Employee Competences

    Get all employees' competences.

  • List Certificates

    Get all certificates.

  • List Document Folders

    Get the list of document folders in your company based on access.

  • List Public Employees

    Get a publicly available list of employees for use in third party applications. The public employee list setting must be enabled on your company.

  • List Casual Employments

    Get a list of all casual employments in your company.

  • List Salaries

    Get all salaries on your employees.

  • Get Salary

    Get salary data for a specific salary ID.

  • List Reported Time

    Get reported time for your company. Defaults to the current month if no date range is provided.

  • List Time Off

    Get time off for your company. Filters by from and/or to date if provided.

  • Update Employee Company Email

    Update the company email of an employee.

  • Update Employee Custom Field

    Update data for a custom employee field.

Hailey HR AI Agent Use Cases

Connect your AI agent to Hailey HR and help your team scale the HR operations they run by hand today.

Employee Onboarding

Use StackOne to connect your AI agent to your HRIS, identity management, and LMS to automate employee onboarding.

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WorkdayBambooHRPersonioHiBobGustoRipplingOkta360Learning
HR Policy Q&A Chatbot

Use StackOne to connect your AI agent to your HRIS, knowledge base, and messaging tools to automate HR policy Q&A.

View
WorkdayBambooHRPersonioHiBobGustoRipplingSharePointConfluence
Employee Offboarding

Use StackOne to connect your AI agent to your HRIS, identity management, and ITSM to automate employee offboarding and deprovisioning.

View
WorkdayBambooHRPersonioOktaServiceNowRipplingGustoJira
More HRIS & HCM use cases

Set Up Your Hailey HR MCP Server in Minutes

One endpoint. Any framework. Your agent is talking to Hailey HR in under 10 lines of code.

MCP Clients

Claude Desktop setup guide
Claude Code setup guide
Cursor setup guide
Goose setup guide

Agent Frameworks

Claude Desktop
{
  "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 HRIS / HCM MCP Servers

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139+ actions

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128+ actions

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127+ actions

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123+ actions

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120+ actions

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All HRIS / HCM MCP Servers →

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

Hailey HR MCP Server FAQ

Does StackOne have a Hailey HR MCP server?
Yes. StackOne offers a hosted Hailey HR MCP server with 25 pre-built actions, and every action is tested and QA'd by StackOne. Connect it to Claude, Cursor, and any other MCP client, or to any agent framework through the AI Action SDK. It ships with managed agent authentication, prompt injection defense, and tool discovery with server-side execution that preserve your agent's context window and keep reasoning performance.
Hailey HR MCP server vs direct API integration — what's the difference?
A Hailey HR MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Hailey HR. A Hailey HR 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 Hailey HR at runtime. StackOne provides both.
How does Hailey HR authentication work for AI agents?
Hailey HR 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 Hailey HR account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via origin_owner_id.
Are Hailey HR MCP tools vulnerable to prompt injection?
Yes — Hailey HR 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 Hailey HR agent and how do I avoid it?
Context bloat happens when Hailey HR tool schemas and API responses eat your Hailey HR agent's memory, preventing it from reasoning effectively. A single Hailey HR 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 Hailey HR agent can access?
Yes — you can limit which actions your Hailey HR 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 Hailey HR MCP server?
Yes — you can create custom agent actions for your Hailey HR MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Hailey HR's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Hailey HR MCP server?
Skip a Hailey HR MCP server if your integration is purely software-to-software — direct Hailey HR 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 Hailey HR actions at runtime.
What AI frameworks and AI clients does the StackOne Hailey HR MCP server support?
The StackOne Hailey HR 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.

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