Zinc MCP Server
for AI Agents
Connect your AI agent to StackOne's Zinc MCP server and give it ready-to-use MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
9 Agent Actions
Create, read, update, and delete across Zinc — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Zinc MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Zinc 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 Zinc call.
Tools Discovery →What is the Zinc MCP Server?
A Zinc MCP server lets AI agents read and write Zinc data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Zinc MCP server ships with 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 Zinc MCP Tools
Every action from Zinc's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Start Check (Pre-Configured Package)s
- Start Check (Pre-Configured Package)
Start a background-check request against a pre-configured customer package.
Start Check (Custom Package Specification)s
- Start Check (Custom Package Specification)
Start a background-check request with an inline package specification (no pre-configured package).
Cancel Requests
- Cancel Request
Cancel an in-flight background-check request.
Mark Request As Revieweds
- Mark Request As Reviewed
Move a request from action-required to reviewed.
Complete Manual DBS Identity Verifications
- Complete Manual DBS Identity Verification
Mark the manual DBS identity verification action as complete on a background-check request.
Packages
- List Packages
List the customer's pre-configured background-check packages.
Results
- Get Results
Get the current status and results of a background-check request.
Reports
- Get Report
Download the PDF report for a completed background-check request.
Requests
- Search Requests
Search background-check requests by candidate email(s) or by request ID.
Zinc AI Agent Use Cases
Connect your AI agent to Zinc and help your team scale the HR operations they run by hand today.
Use StackOne to connect your AI agent to your HRIS, identity management, and LMS to automate employee onboarding.
ViewUse StackOne to connect your AI agent to your HRIS, knowledge base, and messaging tools to automate HR policy Q&A.
ViewUse StackOne to connect your AI agent to your HRIS, identity management, and ITSM to automate employee offboarding and deprovisioning.
ViewSet Up Your Zinc MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Zinc 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 hr-workforce MCP Servers
87+ actions
61+ actions
59+ actions
51+ actions
50+ actions
50+ actions
44+ actions
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
Zinc MCP Server FAQ
Does StackOne have a Zinc MCP server?
Zinc MCP server vs direct API integration — what's the difference?
How does Zinc authentication work for AI agents?
origin_owner_id.Are Zinc MCP tools vulnerable to prompt injection?
What is the context bloat of a Zinc agent and how do I avoid it?
Can I limit which actions my Zinc agent can access?
Can I create custom agent actions for my Zinc MCP server?
When should I NOT use a Zinc MCP server?
What AI frameworks and AI clients does the StackOne Zinc 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.