# 0mcp

> Learn how to turn an API into a hosted MCP server with 0mcp.

## Docs

- [0mcp documentation](https://docs.0mcp.io/index.md): Learn how to turn your API into a hosted MCP server.
- [Introduction](https://docs.0mcp.io/get-started/introduction.md): Learn what 0mcp is, how it works, and when to use it.
- [Why 0mcp?](https://docs.0mcp.io/get-started/why-0mcp.md): See why 0mcp is the fastest way to turn an existing API into a hosted MCP server.
- [Quick start](https://docs.0mcp.io/get-started/quick-start.md): Create, publish, and connect your first MCP server in just a few minutes.
- [How 0mcp works](https://docs.0mcp.io/concepts/how-0mcp-works.md): Understand how 0mcp connects an MCP client to your existing API.
- [Authentication model](https://docs.0mcp.io/concepts/authentication-model.md): Understand how credentials are securely passed from an MCP client to your API.
- [OpenAPI specification](https://docs.0mcp.io/api-sources/openapi.md): Import an OpenAPI 3.x or Swagger 2.0 document into 0mcp, review the generated MCP tools, configure authentication, and publish a hosted MCP server.
- [REST API](https://docs.0mcp.io/api-sources/rest-api.md): Convert an existing REST API directly into a hosted MCP server with 0mcp.
- [Postman collection](https://docs.0mcp.io/api-sources/postman.md): Import a Postman Collection v2 document into 0mcp, review the generated MCP tools, and publish a hosted MCP server.
- [GraphQL](https://docs.0mcp.io/api-sources/graphql.md): Learn the current status of GraphQL support in 0mcp.
- [Playground](https://docs.0mcp.io/guides/playground.md): Test your MCP server before connecting an AI client.
- [Skills over MCP](https://docs.0mcp.io/guides/skills-over-mcp.md): Create, publish, and test Agent Skills through the experimental SEP-2640 MCP extension.
- [Custom domain](https://docs.0mcp.io/guides/custom-domain.md): Connect a custom domain to your hosted 0mcp server, configure the required DNS record, verify the hostname, and activate a branded MCP endpoint.
- [Publish to the MCP Registry](https://docs.0mcp.io/guides/mcp-registry.md): Submit a hosted remote 0mcp server to the official MCP Registry with a verified custom domain.
- [Analytics](https://docs.0mcp.io/guides/analytics.md): Monitor MCP requests, capability usage, errors, response times, payload sizes, and client activity to understand the health of your 0mcp server.
- [Logs](https://docs.0mcp.io/guides/logs.md): Use operational and audit logs to investigate MCP requests, tool failures, configuration changes, response times, and upstream API problems.
- [Versioning](https://docs.0mcp.io/guides/versioning.md): Learn how 0mcp saves server configurations as versions so you can test draft changes, publish updates, and protect connected MCP clients from unfinished work.
- [MCP 2026-07-28 compatibility](https://docs.0mcp.io/guides/mcp-2026-07-28.md): Understand how 0mcp works with the MCP 2026-07-28 protocol era, Streamable HTTP, version negotiation, and client compatibility.
- [Client setup](https://docs.0mcp.io/guides/setup.md): Connect your MCP server to your preferred AI client.
- [Claude Code](https://docs.0mcp.io/guides/setup/claude-code.md): Connect your published 0mcp server to Claude Code.
- [Cursor](https://docs.0mcp.io/guides/setup/cursor.md): Connect a published 0mcp server to Cursor with project or user-level MCP configuration, secure environment variables, and the hosted endpoint.
- [Codex](https://docs.0mcp.io/guides/setup/codex.md): Connect a published 0mcp server to Codex with the generated CLI command or TOML configuration while keeping credentials in environment variables.
- [VS Code](https://docs.0mcp.io/guides/setup/vscode.md): Connect a published 0mcp server to VS Code, add its configuration to mcp.json, enter credentials securely, and confirm that the server starts.
- [Windsurf](https://docs.0mcp.io/guides/setup/windsurf.md): Connect a hosted 0mcp endpoint to Windsurf when your version supports remote Streamable HTTP MCP servers, using secure credentials and client settings.
- [Authentication errors](https://docs.0mcp.io/troubleshooting/authentication-errors.md): Troubleshoot 401, 403, and missing credential errors.
- [Invalid OpenAPI](https://docs.0mcp.io/troubleshooting/invalid-openapi.md): Troubleshoot OpenAPI documents that can't be imported or previewed.
- [MCP connection issues](https://docs.0mcp.io/troubleshooting/mcp-connection-issues.md): Troubleshoot clients that can't connect to your MCP server.
- [Tool discovery problems](https://docs.0mcp.io/troubleshooting/tool-discovery-problems.md): Troubleshoot missing or outdated tools in your MCP client.
- [FAQ](https://docs.0mcp.io/resources/faq.md): Answers about 0mcp, security, clients, usage, and plans.
- [Tutorials](https://docs.0mcp.io/resources/tutorials.md): Follow practical 0mcp tutorials for creating your first server, preparing an OpenAPI document, designing safe tools, and publishing versioned changes.
- [Blog](https://docs.0mcp.io/resources/blog.md): Read 0mcp product updates, practical MCP guides, API integration tutorials, and articles about building and operating hosted MCP servers.
- [What is MCP?](https://docs.0mcp.io/learn/fundamentals/what-is-mcp.md): Learn what the Model Context Protocol (MCP) is, what the name means, and how it connects AI applications to external data, tools, and workflows.
- [Why MCP matters?](https://docs.0mcp.io/learn/fundamentals/why-mcp-matters.md): Understand why the Model Context Protocol matters for AI builders, API providers, product teams, and people who use AI applications.
- [How MCP works?](https://docs.0mcp.io/learn/fundamentals/how-mcp-works.md): Follow the MCP connection lifecycle from initialization and capability discovery to tool calls, results, notifications, and shutdown.
- [MCP architecture explained](https://docs.0mcp.io/learn/fundamentals/mcp-architecture-explained.md): Understand MCP hosts, clients, servers, capability negotiation, security boundaries, and the flow of context and tool requests.
- [Remote MCP servers](https://docs.0mcp.io/learn/fundamentals/remote-mcp-servers.md): Learn what a remote MCP server is, when to use one, how clients connect, and what production security and operations require.
- [Local MCP servers](https://docs.0mcp.io/learn/fundamentals/local-mcp-servers.md): Learn what a local MCP server is, how stdio connections work, common use cases, setup considerations, and local security risks.
- [Local vs remote MCP: Which should you choose?](https://docs.0mcp.io/learn/fundamentals/local-vs-remote-mcp.md): Compare local and remote MCP servers across privacy, access, performance, maintenance, authentication, scaling, and production readiness.
- [The MCP specification explained](https://docs.0mcp.io/learn/fundamentals/mcp-specification-explained.md): Learn how the Model Context Protocol specification defines messages, lifecycle, transports, features, versioning, and security requirements.
- [Custom MCP transport implementation](https://docs.0mcp.io/learn/fundamentals/custom-mcp-transport.md): Learn when a custom MCP transport is justified and how to preserve message framing, lifecycle, sessions, security, and interoperability.
- [Deploying an MCP server on Kubernetes](https://docs.0mcp.io/learn/fundamentals/mcp-server-on-kubernetes.md): Deploy a remote MCP server on Kubernetes with containers, Services, Ingress, secrets, health checks, scaling, observability, and least-privilege security.
- [How to use Claude with MCP](https://docs.0mcp.io/learn/fundamentals/using-claude-with-mcp.md): Connect Claude to local and remote MCP servers through connectors, desktop extensions, Claude Desktop configuration, or Claude Code.
- [MCP vs traditional AI SDKs: What builders should know](https://docs.0mcp.io/learn/fundamentals/mcp-vs-traditional-sdks.md): Compare MCP servers with traditional API and AI SDKs, including consumers, interfaces, distribution, authentication, and when to use both.
- [Comparing MCP SDKs: Python vs TypeScript vs Go](https://docs.0mcp.io/learn/fundamentals/mcp-sdk-comparison.md): Compare official MCP SDKs for Python, TypeScript, and Go by ecosystem, type system, deployment, concurrency, and team fit.
- [MCP Inspector: A guide to testing and debugging](https://docs.0mcp.io/learn/fundamentals/mcp-inspector-guide.md): Use MCP Inspector to connect to local and remote servers, inspect capabilities, call tools, test resources and prompts, and diagnose protocol errors.
- [RAG vs MCP: Differences and when to combine them](https://docs.0mcp.io/learn/fundamentals/rag-vs-mcp.md): Compare retrieval-augmented generation with the Model Context Protocol and learn when an AI system needs RAG, MCP, or both.
- [Hosts, clients, and servers in MCP](https://docs.0mcp.io/learn/core-concepts/hosts-clients-servers.md): Understand the roles of MCP hosts, clients, and servers, how they connect, and where control and security responsibilities belong.
- [Tools](https://docs.0mcp.io/learn/core-concepts/tools.md): Learn what MCP tools are, how models discover and call them, how tool schemas and results work, and how tools differ from resources.
- [Resources](https://docs.0mcp.io/learn/core-concepts/resources.md): Learn how MCP resources provide application-controlled context through URIs, resource templates, read requests, and optional subscriptions.
- [Prompts](https://docs.0mcp.io/learn/core-concepts/prompts.md): Learn how MCP prompts provide reusable, user-controlled message templates with arguments and optional embedded context.
- [Sampling](https://docs.0mcp.io/learn/core-concepts/sampling.md): Learn how MCP sampling lets servers request model generations through a client while the client retains control over models, permissions, and user approval.
- [Transports](https://docs.0mcp.io/learn/core-concepts/transports.md): Understand how MCP transports carry JSON-RPC messages over stdio or Streamable HTTP and how to choose between local and remote connections.
- [Turning OpenAPI specs into MCP servers](https://docs.0mcp.io/learn/build/openapi-to-mcp-server.md): Learn how to convert an OpenAPI specification into an MCP server, map API operations to tools, handle schemas and authentication, and test the result.
- [From REST API to MCP server: A migration guide](https://docs.0mcp.io/learn/build/rest-api-to-mcp-server.md): Convert a REST API directly into an MCP server and follow a staged migration plan covering tool design, authentication, testing, and deployment.
- [MCP server generators: Tools compared](https://docs.0mcp.io/learn/build/mcp-server-generators.md): Compare hosted, code-generating, gateway-based, and SDK approaches for creating MCP servers from OpenAPI, REST APIs, GraphQL APIs, and custom code.
- [The MCP TypeScript SDK: Building clients and servers](https://docs.0mcp.io/learn/build/typescript-sdk.md): Build MCP servers and clients with the official TypeScript SDK, register tools, choose a transport, connect a client, and prepare for production.
- [The MCP Python SDK: Building clients and servers](https://docs.0mcp.io/learn/build/python-sdk.md): Build MCP servers and clients with the official Python SDK and FastMCP, define typed tools, connect through stdio, and prepare for production.
- [How the MCP ecosystem is evolving](https://docs.0mcp.io/learn/build/mcp-ecosystem-evolution.md): Understand how MCP is evolving across remote deployment, discovery, SDKs, extensions, governance, security, and production agent workflows.
- [MCP Server Security](https://docs.0mcp.io/learn/security/mcp-server-security.md): Protect an MCP server from prompt injection, token theft, SSRF, command injection, session hijacking, excessive permissions, and supply-chain attacks.
- [MCP authentication](https://docs.0mcp.io/learn/security/authentication.md): Understand identity and credential verification in MCP, including remote OAuth access, local server credentials, and upstream API authentication.
- [MCP authorization](https://docs.0mcp.io/learn/security/authorization.md): Learn how MCP authorization protects remote servers with OAuth, resource metadata, access tokens, audience validation, scopes, and least privilege.
- [API key management best practices for MCP servers](https://docs.0mcp.io/learn/security/api-key-management.md): Store, scope, rotate, monitor, and revoke API keys safely without exposing credentials to models, logs, source code, or client configuration.
- [Real-time monitoring and logging for MCP servers](https://docs.0mcp.io/learn/best-practices/monitoring-and-logging.md): Learn which MCP server logs, metrics, traces, dashboards, and alerts you need to operate reliable and secure AI integrations.
- [How to test an MCP server](https://docs.0mcp.io/learn/best-practices/how-to-test-mcp-servers.md): Test MCP servers with unit, contract, protocol, integration, security, and performance checks before production.
- [Error handling and debugging for MCP servers](https://docs.0mcp.io/learn/best-practices/error-handling-and-debugging.md): Diagnose MCP connection, protocol, tool, transport, authentication, and upstream API errors with a repeatable debugging workflow.
- [MCP API documentation guide](https://docs.0mcp.io/learn/best-practices/api-documentation-guide.md): Document MCP servers, tools, resources, prompts, authentication, errors, examples, versions, and operational limits for people and AI clients.
- [MCP server configuration best practices](https://docs.0mcp.io/learn/best-practices/server-configuration.md): Configure MCP servers safely across development and production with validated settings, secret isolation, timeouts, limits, and version control.
- [MCP server prompting guide](https://docs.0mcp.io/learn/best-practices/server-prompting-guide.md): Design MCP prompts, server instructions, and tool descriptions that help AI clients choose capabilities accurately and safely.
- [10 useful MCP servers for developers](https://docs.0mcp.io/learn/best-practices/best-mcp-servers.md): Compare ten maintained MCP servers for source control, browser automation, payments, docs, observability, databases, cloud, and local development.
- [MCP streaming performance and transport trade-offs](https://docs.0mcp.io/learn/best-practices/streaming-performance-tradeoffs.md): Understand MCP Streamable HTTP, SSE, stdio, progress updates, resumability, latency, scaling, and long-running operation trade-offs.
- [MCP server architecture for API providers](https://docs.0mcp.io/learn/best-practices/architecture-for-api-providers.md): Design an MCP adapter for an existing REST or GraphQL API with clear tool boundaries, authentication, deployment, observability, and versioning.
- [AGENTS](https://docs.0mcp.io/AGENTS.md)
- [Prompts](https://docs.0mcp.io/capabilities/prompts.md): Create reusable prompt templates for MCP clients.
- [Resources](https://docs.0mcp.io/capabilities/resources.md): Share static content with MCP clients.
- [Tools](https://docs.0mcp.io/capabilities/tools.md): Learn how 0mcp turns your API operations into MCP tools.
- [What is MCP?](https://docs.0mcp.io/concepts/what-is-mcp.md): Understand the Model Context Protocol in plain language.


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