Give your API
an MCP server.In 5 minutes.
Paste your OpenAPI spec. Get a hosted MCP server that works with Claude, ChatGPT, and any MCP client. No infrastructure to manage.
Free tier: 1 project, 5,000 req/mo. No credit card.
Works with
Claude
ChatGPT
Cursor
VS Code
WindsurfHow Vayro fits in your stack
Your API stays as-is. Vayro sits in between — generating MCP tools, handling auth, and connecting your users to every AI client.
Your API
REST + OpenAPI spec
openapi.jsonMCP Hosting Platform
https://mcp.vayro.ai/your-projectAI Clients
Agents & Frameworks
The AI calls your API
Stop guessing if the action went through.
Every MCP request your customers' agents make is logged in real time — payload, status, latency. What they see. What you see.
Or wrap an API you don't own.
Public crypto APIs, weather data, GitHub, your favorite tool — paste their spec, get an MCP server. With per-user OAuth for the ones that need it, encrypted at rest with AES-256-GCM.
Your user
Connects via AI client
Vayro
Redirects to upstream login, stores encrypted token per user
Upstream API
Coingecko, OpenWeather, GitHub, Slack…
Wrap any OpenAPI spec
Public APIs, third-party tools, your own — if it has a spec, paste it and Vayro generates the MCP server.
Per-user OAuth where needed
Each user authenticates with their own account on OAuth-protected upstreams. No shared credentials, no permission leaks.
Encrypted credentials
Tokens are encrypted at rest with AES-256-GCM and decrypted only in memory during API calls.
The fastest way to host MCP
Paste your OpenAPI spec and get a hosted MCP server with auth, analytics, and rate limiting included. No CLI setup, no enterprise onboarding.
| Vayro | Stainless | Cloudflare Workers | |
|---|---|---|---|
| Free tier | 1 project, 5K req/mo | 5 SDKs, 25 endpoints | 100K req/day |
| 100K requests/mo | $49/mo flat | $99–500/mo per SDK | $5/mo + dev time |
| Setup | Paste OpenAPI in browser | CLI + config | Code MCP + deploy |
| Time to live | 5 minutes | ~30 minutes | Days–weeks |
| Fully hosted | |||
| SDK generation | x | ||
| Built-in OAuth | Separate proxy | ||
| Analytics & logs | Basic dashboard | ||
| Rate limiting | |||
| Upstream user login |
Enterprise security. Startup pricing.
Your API credentials are encrypted at rest with AES-256-GCM. AI clients authenticate via OAuth 2.0 with PKCE.
AES-256-GCM
Credentials encrypted before storage, decrypted only in memory
OAuth 2.0 + PKCE
S256 challenge for AI client auth. Industry standard.
AI rate limiting
AI agents can call your API thousands of times per minute. Per-project limits ensure they can't.
Edge runtime
Cloudflare Workers. Global. Fast. No cold starts.
Build it yourself?
You could. Here's what that looks like.
Do it yourself
- Implement MCP protocol from scratch
- Build OAuth 2.0 + PKCE auth layer
- Set up rate limiting & abuse protection
- Deploy and manage hosting infrastructure
- Build analytics and request logging
- Handle encryption for stored credentials
- Monitor uptime and handle incidents
- Keep up with MCP spec changes
Use Vayro
- Paste your OpenAPI spec
- Get a hosted MCP server instantly
- Auth, rate limiting, analytics included
Ready to make your API AI-accessible?
Paste your OpenAPI spec and get a hosted MCP server in 5 minutes. Free tier included — no credit card required.
Not sure where to start?
We'll review your API and show you exactly how to expose it via MCP — free.
Get a free MCP auditFrequently asked questions
What is Vayro?
Vayro is a hosted MCP (Model Context Protocol) platform that converts any OpenAPI specification into a fully hosted MCP server. You paste your OpenAPI spec and get a hosted MCP endpoint that works with Claude, ChatGPT, Cursor, VS Code, Windsurf, and any MCP-compatible AI client. Vayro handles tool generation, authentication, analytics, rate limiting, and encryption.
How do I create an MCP server from my OpenAPI spec?
Paste your OpenAPI spec URL or JSON into the Vayro dashboard. Vayro automatically parses your endpoints and generates one MCP tool per API operation with typed inputs and descriptions. You get a hosted MCP URL (https://mcp.vayro.ai/your-project) that you can connect to from any AI client. The whole process takes under 5 minutes.
Can I create an MCP server for an API I don't own?
Yes. With Vayro's upstream OAuth feature, you can create an MCP server for any API that has a public OpenAPI spec and OAuth login — like GitHub, Slack, Stripe, or Salesforce. Each end user authenticates with their own account, so tokens are per-user and encrypted with AES-256-GCM.
Which AI clients does Vayro work with?
Vayro works with Claude (CLI and Desktop), ChatGPT, Cursor, VS Code Copilot, Windsurf, OpenAI Agents SDK, LangChain, n8n, and any MCP-compatible client. A single MCP URL works with all of them.
How is Vayro different from Stainless, Speakeasy, or FastMCP?
Vayro is the only paste-and-go option. Stainless generates SDKs and hosts MCP servers, but requires CLI setup and prices per-SDK ($79–499/mo). Gram offers hosted MCP with usage-based pricing ($0.01/call — 100K calls = ~$1,000/mo). FastMCP is a Python framework where you write code yourself. Cloudflare Workers gives you infrastructure but you build everything. Vayro: paste your OpenAPI spec in a browser, get a hosted MCP server in 5 minutes, with flat pricing starting at $0/month.
What is upstream OAuth / user login?
Upstream OAuth lets end users authenticate with the upstream API using their own credentials. When a user connects to your Vayro-hosted MCP server, they're redirected to the upstream API's OAuth login (e.g., GitHub, Google, Slack). Their token is encrypted and stored per-user, so each person accesses the API with their own permissions. This is unique to Vayro — no other MCP hosting platform offers this.
Is Vayro free?
Yes. The free tier includes 1 project and 5,000 requests per month with no credit card required. Paid plans start at $49/month for 5 projects and 100,000 requests.
How does Vayro handle security?
All upstream API credentials and tokens are encrypted at rest with AES-256-GCM and decrypted only in memory during invocation. AI clients authenticate via OAuth 2.0 with PKCE (S256 challenge). Rate limiting with X-RateLimit headers is built in. The runtime runs on Cloudflare Workers at the edge.