Bring Payroll
to Pydantic AI
Create your Vinkius account to connect OnPay to Pydantic AI and start using all 8 AI tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code. No hosting, no server setup — just connect and start using.
Compatible with every major AI agent and IDE
What is the OnPay MCP Server?
Connect your OnPay account to empower your AI agents with payroll and HR capabilities. This server provides programmatic access to the OnPay API, allowing for seamless management of employee profiles, payment transactions, and recurring pay schedules.
What you can do
- Employee Directory — List and inspect complete employee profiles and records
- Transaction Monitoring — Access historical payment transactions and statuses in real-time
- Payroll Orchestration — Monitor upcoming pay schedules and cycles for your company
- Subscription Tracking — View active and past subscriptions managed through the platform
- Accounting Integration — Retrieve item codes and company settings for financial reconciliation
How it works
- Subscribe to this server
- Enter your OnPay API Token from your management panel
- Start managing your payroll operations from Claude, Cursor, or any MCP client
Built-in capabilities (8)
Get general company information
Get employee details
Get transaction details
List all employees
List accounting item codes
List payroll schedules
List subscriptions
List payment transactions
Why Pydantic AI?
Pydantic AI validates every OnPay tool response against typed schemas, catching data inconsistencies at build time. Connect 8 tools through Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code. full type safety, structured output guarantees, and dependency injection for testable agents.
- —
Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application
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Model-agnostic architecture. switch between OpenAI, Anthropic, or Gemini without changing your OnPay integration code
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Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors
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Dependency injection system cleanly separates your OnPay connection logic from agent behavior for testable, maintainable code
OnPay in Pydantic AI
Why run OnPay with Vinkius?
The OnPay connection runs on our fully managed, secure cloud infrastructure. We handle the hosting, maintenance, and security so you don't have to deal with servers or code. All 8 tools are ready to work instantly without any complex setup.
You stay in complete control of your data. Your AI only accesses the information you approve, keeping your sensitive passwords and private details completely safe. Plus, with automatic optimizations, your AI works faster and more efficiently.

* Every connection is hosted and maintained by Vinkius. We handle the security, updates, and infrastructure so you don't have to write code or manage servers. See our infrastructure
Over 4,000 integrations ready for AI agents
Explore a vast library of pre-built integrations, optimized and ready to deploy.
Connect securely in under 30 seconds
Generate tokens to authenticate and link external services in a single step.
Complete visibility into every agent action
Audit live requests, latency, success rates, and active security compliance policies.
Optimize spending and track token ROI
Analyze real-time token consumption and cost metrics detailed by connection.




Explore our live AI Agents Analytics dashboard to see it all working
This dashboard is included when you connect OnPay using Vinkius. You will never be left in the dark about what your AI agents are doing with your tools.
OnPay and 4,000+ other AI tools. No hosting, no code, ready to use.
Professionals who connect OnPay to Pydantic AI through Vinkius don't need to write code, manage servers, or worry about security. Everything is pre-configured, secure, and runs automatically in the background.
Raw MCP | Vinkius | |
|---|---|---|
| Ready-to-use MCPs | Find and configure each manually | 4,000+ MCPs ready to use |
| Connection Setup | Manual coding & server setup | 1-click instant connection |
| Server Hosting | You host it yourself (needs 24/7 uptime) | 100% hosted & managed by Vinkius |
| Security & Privacy | Stored in plaintext config files | Bank-grade encrypted vault |
| Activity Visibility | Blind execution (no logs or tracking) | Live dashboard with real-time logs |
| Cost Control | Runaway AI token spend risk | Automatic budget limits |
| Revoking Access | Must delete files or code to stop | 1-click disconnect button |
How Vinkius secures
OnPay for Pydantic AI
Every request between Pydantic AI and OnPay is protected by our secure gateway. We automatically keep your sensitive data private, prevent unauthorized access, and let you disconnect instantly at any time.
Frequently asked questions
How do I get an OnPay API Token?
Log in to your OnPay management panel, and navigate to Settings > API to generate a static API token.
How does Pydantic AI discover MCP tools?
Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.
Does Pydantic AI validate MCP tool responses?
Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.
Can I switch LLM providers without changing MCP code?
Absolutely. Pydantic AI abstracts the model layer. your OnPay MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.
MCPServerHTTP not found
Update: pip install --upgrade pydantic-ai
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