679 pages for env.

Client Best Practices Model Context Protocol · in the page docs/2026-07-28/develop/clients/client-best-practices …model writes code that calls tools. The code executes in a sandboxed environment, and only the final result returns to the model. Programmatic tool calling is powerful and allows for more efficient… Connect to local MCP servers Model Context Protocol · in the page docs/2026-07-28/develop/connect-local-servers …path, you may need to add the expanded value of `%APPDATA%` to your `env` key in `claude_desktop_config.json`: > > ```json theme={null} > { > "brave-search": { > "command": "npx", > "args":… Connect to remote MCP Servers Model Context Protocol · in the page docs/2026-07-28/develop/connect-remote-servers …te MCP servers extend AI applications' capabilities beyond your local environment, providing access to internet-hosted tools, services, and data sources. By connecting to remote MCP servers, you trans… Architecture overview Model Context Protocol · in the page docs/2026-07-28/learn/architecture …his notification system is crucial for several reasons: 1. **Dynamic Environments**: Tools may come and go based on server state, external dependencies, or user permissions 2. **Efficiency**: Clients… Debugging Model Context Protocol · in the page docs/2026-07-28/tools/debugging …om anywhere * Always use absolute paths in your configuration and `.env` files to ensure reliable operation * For testing servers directly via command line, the working directory will be where y… MCP Inspector Model Context Protocol · in the page docs/2026-07-28/tools/inspector …ctor stores secrets (OAuth tokens, OAuth client secrets, and stdio > `env:` values) in the OS keychain when one is available.** On a machine with > no keychain (Linux without libsecret or a Secret Ser… Authorization Model Context Protocol · in the page docs/2026-07-28/tools/inspector/authorization …NSPECTOR_OAUTH_STATE_PATH`, then `<MCP_STORAGE_DIR>/oauth.json` (see [Environment variables](/docs/2026-07-28/tools/inspector/configuration.md#environment-variables)), then the default above. All thre… CLI client Model Context Protocol · in the page docs/2026-07-28/tools/inspector/cli …le-tool output of > `tools/call --app-info`. ## Exit codes and error envelopes Every non-zero exit maps to a stable failure class, so a caller can branch on *why* without scraping prose: | Code | M… Configuration and flags Model Context Protocol · in the page docs/2026-07-28/tools/inspector/configuration …> Catalog vs. config files, which client owns which flag, and every environment variable The `mcp-inspector` binary is a launcher: it reads two flags of its own and forwards every other argument to… mcpdo connection client Model Context Protocol · in the page docs/2026-07-28/tools/inspector/mcpdo …| `--format json` | The pretty-printed payload, with no `{ result }` envelope. For scripts and agents. | The global flags are `--format`, `--plain`, `--connection` / `--conn`, `--catalog` / `--confi… Recipes Model Context Protocol · in the page docs/2026-07-28/tools/inspector/recipes …parsed by the Inspector and never reach the server. Give the process environment variables with `-e` and a working directory with `--cwd`: ```bash theme={null} mcp-inspector -e API_KEY=abc123 -e REG… Security Model Context Protocol · in the page docs/2026-07-28/tools/inspector/security …ECTOR_SECRET_KEY_FILE` (a Docker or Compose secret) rather than as an environment variable: a key passed with `-e MCP_INSPECTOR_SECRET_KEY=…` is visible to anyone who can run `docker inspect` or `dock… TUI client Model Context Protocol · in the page docs/2026-07-28/tools/inspector/tui …as the web client. Use it on a remote host over SSH, in a locked-down environment, or when you prefer to stay in the terminal. ```bash theme={null} npx @modelcontextprotocol/inspector --tui node buil… Web client Model Context Protocol · in the page docs/2026-07-28/tools/inspector/web …. `sessionStorage`, as a backstop. Set the `MCP_INSPECTOR_API_TOKEN` environment variable to pin a known token (useful for scripted launches), or set `DANGEROUSLY_OMIT_AUTH=true` to disable the check… Understanding Authorization in MCP Model Context Protocol · in the page docs/2026-07-28/tutorials/security/authorization …o its APIs that require user consent * You're building for enterprise environments with strict access controls * You want to implement rate limiting or usage tracking per user > [!TIP] > > **Authoriz… Local Server Security Model Context Protocol · in the page docs/2026-07-28/tutorials/security/local-server-security …t as a child process of your user account. That process inherits your environment variables, can read anything your account can read — SSH keys, cloud credentials, browser profiles, your home director… Security Best Practices Model Context Protocol · in the page docs/2026-07-28/tutorials/security/security_best_practices …elated URLs. Which protections are appropriate depend on your network environment. **Enforce HTTPS** MCP clients **SHOULD** require HTTPS for all OAuth-related URLs in production environments: * Re… Build an MCP client Model Context Protocol · in the page docs/draft/develop/build-client …* You must use the Python MCP SDK 2.0.0 or higher ## Setting Up Your Environment First, create a new Python project with `uv`: ```bash macOS/Linux theme={null} # Create project directory uv init mc… Build an MCP server Model Context Protocol · in the page docs/draft/develop/build-server …. * You must use the Python MCP SDK 2.0.0 or higher. ### Set up your environment First, let's install `uv` and set up our Python project and environment: ```bash macOS/Linux theme={null} curl -LsSf… Client Best Practices Model Context Protocol · in the page docs/draft/develop/clients/client-best-practices …model writes code that calls tools. The code executes in a sandboxed environment, and only the final result returns to the model. Programmatic tool calling is powerful and allows for more efficient… Connect to local MCP servers Model Context Protocol · in the page docs/draft/develop/connect-local-servers …path, you may need to add the expanded value of `%APPDATA%` to your `env` key in `claude_desktop_config.json`: > > ```json theme={null} > { > "brave-search": { > "command": "npx", > "args":… Connect to remote MCP Servers Model Context Protocol · in the page docs/draft/develop/connect-remote-servers …te MCP servers extend AI applications' capabilities beyond your local environment, providing access to internet-hosted tools, services, and data sources. By connecting to remote MCP servers, you trans… Architecture overview Model Context Protocol · in the page docs/draft/learn/architecture …his notification system is crucial for several reasons: 1. **Dynamic Environments**: Tools may come and go based on server state, external dependencies, or user permissions 2. **Efficiency**: Clients… Debugging Model Context Protocol · in the page docs/draft/tools/debugging …om anywhere * Always use absolute paths in your configuration and `.env` files to ensure reliable operation * For testing servers directly via command line, the working directory will be where y… MCP Inspector Model Context Protocol · in the page docs/draft/tools/inspector …ctor stores secrets (OAuth tokens, OAuth client secrets, and stdio > `env:` values) in the OS keychain when one is available.** On a machine with > no keychain (Linux without libsecret or a Secret Ser… Authorization Model Context Protocol · in the page docs/draft/tools/inspector/authorization …NSPECTOR_OAUTH_STATE_PATH`, then `<MCP_STORAGE_DIR>/oauth.json` (see [Environment variables](/docs/draft/tools/inspector/configuration.md#environment-variables)), then the default above. All three cli… CLI client Model Context Protocol · in the page docs/draft/tools/inspector/cli …le-tool output of > `tools/call --app-info`. ## Exit codes and error envelopes Every non-zero exit maps to a stable failure class, so a caller can branch on *why* without scraping prose: | Code | M… Configuration and flags Model Context Protocol · in the page docs/draft/tools/inspector/configuration …> Catalog vs. config files, which client owns which flag, and every environment variable The `mcp-inspector` binary is a launcher: it reads two flags of its own and forwards every other argument to… mcpdo connection client Model Context Protocol · in the page docs/draft/tools/inspector/mcpdo …| `--format json` | The pretty-printed payload, with no `{ result }` envelope. For scripts and agents. | The global flags are `--format`, `--plain`, `--connection` / `--conn`, `--catalog` / `--confi… Recipes Model Context Protocol · in the page docs/draft/tools/inspector/recipes …parsed by the Inspector and never reach the server. Give the process environment variables with `-e` and a working directory with `--cwd`: ```bash theme={null} mcp-inspector -e API_KEY=abc123 -e REG… Security Model Context Protocol · in the page docs/draft/tools/inspector/security …ECTOR_SECRET_KEY_FILE` (a Docker or Compose secret) rather than as an environment variable: a key passed with `-e MCP_INSPECTOR_SECRET_KEY=…` is visible to anyone who can run `docker inspect` or `dock… TUI client Model Context Protocol · in the page docs/draft/tools/inspector/tui …as the web client. Use it on a remote host over SSH, in a locked-down environment, or when you prefer to stay in the terminal. ```bash theme={null} npx @modelcontextprotocol/inspector --tui node buil… Web client Model Context Protocol · in the page docs/draft/tools/inspector/web …. `sessionStorage`, as a backstop. Set the `MCP_INSPECTOR_API_TOKEN` environment variable to pin a known token (useful for scripted launches), or set `DANGEROUSLY_OMIT_AUTH=true` to disable the check… Understanding Authorization in MCP Model Context Protocol · in the page docs/draft/tutorials/security/authorization …o its APIs that require user consent * You're building for enterprise environments with strict access controls * You want to implement rate limiting or usage tracking per user > [!TIP] > > **Authoriz… Local Server Security Model Context Protocol · in the page docs/draft/tutorials/security/local-server-security …t as a child process of your user account. That process inherits your environment variables, can read anything your account can read — SSH keys, cloud credentials, browser profiles, your home director… Security Best Practices Model Context Protocol · in the page docs/draft/tutorials/security/security_best_practices …elated URLs. Which protections are appropriate depend on your network environment. **Enforce HTTPS** MCP clients **SHOULD** require HTTPS for all OAuth-related URLs in production environments: * Re… Example Servers Model Context Protocol · in the page examples …, "args": ["-y", "@modelcontextprotocol/server-github"], "env": { "GITHUB_PERSONAL_ACCESS_TOKEN": "<YOUR_TOKEN>" } } } } ``` ## Additional resources Visit the [MCP Se… Build an MCP App Model Context Protocol · in the page extensions/apps/build …} Copy-Item -Recurse ext-apps\plugins\mcp-apps\skills\create-mcp-app $env:USERPROFILE\.claude\skills\create-mcp-app ``` Or install it for a single project only by copying to `.claude/skills/` in your… Enterprise-Managed Authorization Model Context Protocol · in the page extensions/auth/enterprise-managed-authorization …ged Authorization > Centralized access control for MCP in enterprise environments via identity providers The Enterprise-Managed Authorization extension (`io.modelcontextprotocol/enterprise-managed-a… OAuth Client Credentials Model Context Protocol · in the page extensions/auth/oauth-client-credentials …sk: > > * Store secrets in a secrets manager, never in source code or environment files checked into version control. > * Rotate secrets on a regular schedule and immediately after any suspected compr… Authorization Extensions Model Context Protocol · in the page extensions/auth/overview …o authenticate without interactive user consent flows. * **Enterprise environments** often have centralized identity providers (IdPs) that enforce policy across all applications. Requiring employees t… Extensions Overview Model Context Protocol · in the page extensions/overview …/auth/enterprise-managed-authorization.md) | Framework for enterprise environments requiring centralized access control. | ### MCP Apps > **[modelcontextprotocol/ext-apps](https://github.com/modelco… Tasks Model Context Protocol · in the page extensions/tasks/overview …**Unreliable connections.** Mobile clients, intermittent networks, or environments where connections drop. Task IDs survive disconnects. **Batch processing.** Operations that process many items (bulk… The MCP Registry Model Context Protocol · in the page registry/about …remote server URL) * Execution instructions (e.g., command-line args, env vars) * Other discovery data (e.g., description, server capabilities) ## The MCP Registry Ecosystem The MCP Registry is part… How to Automate Publishing with GitHub Actions Model Context Protocol · in the page registry/github-actions …- name: Publish package to npm run: npm publish env: NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }} ### Publish MCP server: - name: Install mcp-publisher… Quickstart: Publish an MCP Server to the MCP Registry Model Context Protocol · in the page registry/quickstart …"1.0.0", "transport": { "type": "stdio" }, "environmentVariables": [ { "description": "Your API key for the service", "isRequired": true,… Official MCP Registry Terms of Service Model Context Protocol · in the page registry/terms-of-service …e or failure of the Registry could lead to death, personal injury, or environmental damage; 7. Use the Registry to process or store any data that is subject to the International Traffic in Arms Reg… SEP-1686: Tasks Model Context Protocol · in the page seps/1686-tasks …s a real requirement for these types of MCP deployments in production environments. **Integration with Existing Architectures** Many workflow-driven systems already provide active execution-tracking… SEP-2148: MCP Contributor Ladder Model Context Protocol · in the page seps/2148-contributor-ladder …cidents to Core Maintainers * Help maintain a welcoming and inclusive environment for all community members * Coordinate with other moderators to ensure consistent enforcement * Document moderation ac… SEP-2149: MCP Group Governance and Charter Template Model Context Protocol · in the page seps/2149-working-group-charter-template …Enterprise IG explores the challenges of deploying MCP in enterprise environments, gathering use cases and requirements to inform future specification work. #### 3. Scope **In Scope**: Enumerated r…