1,120 pages for message.

Build an MCP client Model Context Protocol · in the page docs/2024-11-05/develop/build-client …> str: """Process a query using Claude and available tools""" messages = [ { "role": "user", "content": query } ] response = await self.session… Build an MCP server Model Context Protocol · in the page docs/2024-11-05/develop/build-server …** Never write to stdout. Writing to stdout will corrupt the JSON-RPC messages and break your server. The `print()` function writes to stdout by default, but can be used safely with `file=sys.stderr`.… Build with Agent Skills Model Context Protocol · in the page docs/2024-11-05/develop/build-with-agent-skills …s * **Upstream auth** — API keys, OAuth 2.0, or none If your opening message already covers these, the agent skips ahead to the recommendation. ## Deployment paths Based on discovery, the skill rec… Client Best Practices Model Context Protocol · in the page docs/2024-11-05/develop/clients/client-best-practices …ority of the context window before the model has even read the user's message.  or via [`notifications/message`](/specification/2024-11-05/server/utilities/logging#log-message-notifications) (all transports). 3. **Client developer… MCP Inspector Model Context Protocol · in the page docs/2024-11-05/tools/inspector …s * Enables prompt testing with custom arguments * Previews generated messages ### Tools tab * Lists available tools * Shows tool schemas and descriptions * Enables tool testing with custom inputs *… Understanding Authorization in MCP Model Context Protocol · in the page docs/2024-11-05/tutorials/security/authorization …({ jsonrpc: "2.0", error: { code: -32000, message: "Bad Request: No valid session ID provided", }, id: null, }); return; } await transport.handleRe… Security Best Practices Model Context Protocol · in the page docs/2024-11-05/tutorials/security/security_best_practices …keys, and other secrets * **Internal network reconnaissance**: Error messages reveal information about internal network topology and services * **Service interaction**: POST requests (e.g., to toke… Build an MCP client Model Context Protocol · in the page docs/2025-03-26/develop/build-client …> str: """Process a query using Claude and available tools""" messages = [ { "role": "user", "content": query } ] response = await self.session… Build an MCP server Model Context Protocol · in the page docs/2025-03-26/develop/build-server …** Never write to stdout. Writing to stdout will corrupt the JSON-RPC messages and break your server. The `print()` function writes to stdout by default, but can be used safely with `file=sys.stderr`.… Build with Agent Skills Model Context Protocol · in the page docs/2025-03-26/develop/build-with-agent-skills …s * **Upstream auth** — API keys, OAuth 2.0, or none If your opening message already covers these, the agent skips ahead to the recommendation. ## Deployment paths Based on discovery, the skill rec… Client Best Practices Model Context Protocol · in the page docs/2025-03-26/develop/clients/client-best-practices …ority of the context window before the model has even read the user's message.  or via [`notifications/message`](/specification/2025-03-26/server/utilities/logging#log-message-notifications) (all transports). 3. **Client developer… MCP Inspector Model Context Protocol · in the page docs/2025-03-26/tools/inspector …s * Enables prompt testing with custom arguments * Previews generated messages ### Tools tab * Lists available tools * Shows tool schemas and descriptions * Enables tool testing with custom inputs *… Understanding Authorization in MCP Model Context Protocol · in the page docs/2025-03-26/tutorials/security/authorization …({ jsonrpc: "2.0", error: { code: -32000, message: "Bad Request: No valid session ID provided", }, id: null, }); return; } await transport.handleRe… Security Best Practices Model Context Protocol · in the page docs/2025-03-26/tutorials/security/security_best_practices …keys, and other secrets * **Internal network reconnaissance**: Error messages reveal information about internal network topology and services * **Service interaction**: POST requests (e.g., to toke… Build an MCP client Model Context Protocol · in the page docs/2025-06-18/develop/build-client …> str: """Process a query using Claude and available tools""" messages = [ { "role": "user", "content": query } ] response = await self.session… Build an MCP server Model Context Protocol · in the page docs/2025-06-18/develop/build-server …** Never write to stdout. Writing to stdout will corrupt the JSON-RPC messages and break your server. The `print()` function writes to stdout by default, but can be used safely with `file=sys.stderr`.… Build with Agent Skills Model Context Protocol · in the page docs/2025-06-18/develop/build-with-agent-skills …s * **Upstream auth** — API keys, OAuth 2.0, or none If your opening message already covers these, the agent skips ahead to the recommendation. ## Deployment paths Based on discovery, the skill rec… Client Best Practices Model Context Protocol · in the page docs/2025-06-18/develop/clients/client-best-practices …ority of the context window before the model has even read the user's message. ![Comparison of loading all tools upfront versus discovering tools on demand. The upfront approach consumes \~150,000 to… Connect to remote MCP Servers Model Context Protocol · in the page docs/2025-06-18/develop/connect-remote-servers …ersations. You can access these by clicking the paperclip icon in the message input area, which opens the attachment menu. ![Attachment menu showing available resources](https://mintcdn.com/mcp/cpXzQ… Architecture overview Model Context Protocol · in the page docs/2025-06-18/learn/architecture …s and servers, including transport-specific connection establishment, message framing, and authorization. Conceptually the data layer is the inner layer, while the transport layer is the outer layer.… Understanding MCP clients Model Context Protocol · in the page docs/2025-06-18/learn/client-concepts …script theme={null} { method: "elicitation/create", params: { message: "Please confirm your Barcelona vacation booking details:", requestedSchema: { type: "object", properties:… Understanding MCP servers Model Context Protocol · in the page docs/2025-06-18/learn/server-concepts …nal APIs, modify files, or trigger other logic. | Search flights Send messages Create calendar events | Model | | **Resources** | Passive data sources that provide read-only access to information for… Debugging Model Context Protocol · in the page docs/2025-06-18/tools/debugging …structured logs to stderr (stdio transport) or via [`notifications/message`](/specification/2025-06-18/server/utilities/logging#log-message-notifications) (all transports). 3. **Client developer… MCP Inspector Model Context Protocol · in the page docs/2025-06-18/tools/inspector …s * Enables prompt testing with custom arguments * Previews generated messages ### Tools tab * Lists available tools * Shows tool schemas and descriptions * Enables tool testing with custom inputs *… Understanding Authorization in MCP Model Context Protocol · in the page docs/2025-06-18/tutorials/security/authorization …({ jsonrpc: "2.0", error: { code: -32000, message: "Bad Request: No valid session ID provided", }, id: null, }); return; } await transport.handleRe… Security Best Practices Model Context Protocol · in the page docs/2025-06-18/tutorials/security/security_best_practices …keys, and other secrets * **Internal network reconnaissance**: Error messages reveal information about internal network topology and services * **Service interaction**: POST requests (e.g., to toke… Build an MCP client Model Context Protocol · in the page docs/2025-11-25/develop/build-client …> str: """Process a query using Claude and available tools""" messages = [ { "role": "user", "content": query } ] response = await self.session… Build an MCP server Model Context Protocol · in the page docs/2025-11-25/develop/build-server …** Never write to stdout. Writing to stdout will corrupt the JSON-RPC messages and break your server. The `print()` function writes to stdout by default, but can be used safely with `file=sys.stderr`.… Build with Agent Skills Model Context Protocol · in the page docs/2025-11-25/develop/build-with-agent-skills …s * **Upstream auth** — API keys, OAuth 2.0, or none If your opening message already covers these, the agent skips ahead to the recommendation. ## Deployment paths Based on discovery, the skill rec… Client Best Practices Model Context Protocol · in the page docs/2025-11-25/develop/clients/client-best-practices …ority of the context window before the model has even read the user's message. ![Comparison of loading all tools upfront versus discovering tools on demand. The upfront approach consumes \~150,000 to… Connect to remote MCP Servers Model Context Protocol · in the page docs/2025-11-25/develop/connect-remote-servers …ersations. You can access these by clicking the paperclip icon in the message input area, which opens the attachment menu. ![Attachment menu showing available resources](https://mintcdn.com/mcp/cpXzQ… Architecture overview Model Context Protocol · in the page docs/2025-11-25/learn/architecture …s and servers, including transport-specific connection establishment, message framing, and authorization. Conceptually the data layer is the inner layer, while the transport layer is the outer layer.… Understanding MCP clients Model Context Protocol · in the page docs/2025-11-25/learn/client-concepts …script theme={null} { method: "elicitation/create", params: { message: "Please confirm your Barcelona vacation booking details:", requestedSchema: { type: "object", properties:… Understanding MCP servers Model Context Protocol · in the page docs/2025-11-25/learn/server-concepts …nal APIs, modify files, or trigger other logic. | Search flights Send messages Create calendar events | Model | | **Resources** | Passive data sources that provide read-only access to information for… Debugging Model Context Protocol · in the page docs/2025-11-25/tools/debugging …structured logs to stderr (stdio transport) or via [`notifications/message`](/specification/2025-11-25/server/utilities/logging#log-message-notifications) (all transports). 3. **Client developer… MCP Inspector Model Context Protocol · in the page docs/2025-11-25/tools/inspector …s * Enables prompt testing with custom arguments * Previews generated messages ### Tools tab * Lists available tools * Shows tool schemas and descriptions * Enables tool testing with custom inputs *… Understanding Authorization in MCP Model Context Protocol · in the page docs/2025-11-25/tutorials/security/authorization …({ jsonrpc: "2.0", error: { code: -32000, message: "Bad Request: No valid session ID provided", }, id: null, }); return; } await transport.handleRe… Security Best Practices Model Context Protocol · in the page docs/2025-11-25/tutorials/security/security_best_practices …keys, and other secrets * **Internal network reconnaissance**: Error messages reveal information about internal network topology and services * **Service interaction**: POST requests (e.g., to toke… Build an MCP client Model Context Protocol · in the page docs/2026-07-28/develop/build-client …> str: """Process a query using Claude and available tools""" messages = [ { "role": "user", "content": query } ] tool_list = await client.list… Build an MCP server Model Context Protocol · in the page docs/2026-07-28/develop/build-server …** Never write to stdout. Writing to stdout will corrupt the JSON-RPC messages and break your server. The `print()` function writes to stdout by default, so keep it out of a STDIO server entirely. **…