Compatible with every major AI agent and IDE
What is the User-Agent Parser MCP Server?
When an IT Support Agent analyzes an error log or a firewall access log, it encounters messy User-Agent strings like Mozilla/5.0 (iPhone; CPU iPhone OS 16_5 like Mac OS X) AppleWebKit/605.1.15. LLMs often misinterpret these strings, causing them to hallucinate the wrong device or browser version. This MCP solves that entirely.
The Superpowers
- Deterministic Parsing: Uses the industry-standard
ua-parser-jsto surgically extract the exact OS, Engine, Browser, and Device. - Log Analysis: Transforms unreadable logs into clean JSON, empowering AI agents to accurately diagnose platform-specific bugs.
Built-in capabilities (1)
Pass the raw UA string from HTTP headers or server logs and receive exact identification of the client. Decodes raw HTTP User-Agent strings into structured JSON objects (Browser, OS, Device). Prevents LLMs from hallucinating client specs from log files
Why Mastra AI?
Mastra's agent abstraction provides a clean separation between LLM logic and User-Agent Parser tool infrastructure. Connect 1 tools through Vinkius and use Mastra's built-in workflow engine to chain tool calls with conditional logic, retries, and parallel execution. deployable to any Node.js host in one command.
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Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add User-Agent Parser without touching business code
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Built-in workflow engine chains MCP tool calls with conditional logic, retries, and parallel execution for complex automation
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TypeScript-native: full type inference for every User-Agent Parser tool response with IDE autocomplete and compile-time checks
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One-command deployment to any Node.js host. Vercel, Railway, Fly.io, or your own infrastructure
User-Agent Parser in Mastra AI
User-Agent Parser and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect User-Agent Parser to Mastra AI through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 4,000+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for User-Agent Parser in Mastra AI
The User-Agent Parser MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 1 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Mastra AI only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
User-Agent Parser for Mastra AI
Every tool call from Mastra AI to the User-Agent Parser MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
Is it accurate for mobile devices?
Yes, it accurately identifies iOS, Android versions, and specific phone models.
Why not use a regex in the LLM prompt?
User-Agents change daily and are heavily obfuscated. A hardcoded regex will fail on newer devices.
Does it identify bots?
Yes, the parser can identify common web crawlers, scrapers, and search engine bots (like Googlebot).
How does Mastra AI connect to MCP servers?
Create an MCPClient with the server URL and pass it to your agent. Mastra discovers all tools and makes them available with full TypeScript types.
Can Mastra agents use tools from multiple servers?
Yes. Pass multiple MCP clients to the agent constructor. Mastra merges all tool schemas and the agent can call any tool from any server.
Does Mastra support workflow orchestration?
Yes. Mastra has a built-in workflow engine that lets you chain MCP tool calls with branching logic, error handling, and parallel execution.
createMCPClient not exported
Install: npm install @mastra/mcp
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