import contextlib
from collections.abc import AsyncIterator
from typing import TypedDict
from dataclasses import dataclass, field
from starlette.applications import Starlette
from http_mcp.server import MCPServer

@dataclass
class Context:
    call_count: int = 0
    user_preferences: dict = field(default_factory=dict)

class State(TypedDict):
    context: Context

@contextlib.asynccontextmanager
async def lifespan(_app: Starlette) -> AsyncIterator[State]:
    yield {"context": Context()}

mcp_server = MCPServer(
    name="my-server",
    version="1.0.0",
    tools=my_tools,
    prompts=my_prompts,
    instructions="Optional instructions for AI assistants on how to use this server"
)

app = Starlette(lifespan=lifespan)
app.mount("/mcp", mcp_server.app)

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_weather",
    "arguments": { "location": "Seattle, WA" },
    "_meta": {
      "io.modelcontextprotocol/protocolVersion": "2026-07-28",
      "io.modelcontextprotocol/clientInfo": { "name": "ExampleClient", "version": "1.0.0" },
      "io.modelcontextprotocol/clientCapabilities": {}
    }
  }
}

{
  "resultType": "complete",
  "supportedVersions": ["2026-07-28"],
  "capabilities": { "tools": { "listChanged": false }, "prompts": { "listChanged": false } },
  "_meta": { "io.modelcontextprotocol/serverInfo": { "name": "my-server", "version": "1.0.0" } },
  "ttlMs": 300000,
  "cacheScope": "public"
}

mcp_server = MCPServer(
    name="my-server",
    version="1.0.0",
    tools=my_tools,
    cache_ttl_ms=300_000,   # clients may treat the list as fresh for 5 minutes
    cache_scope="public",   # shared caches may serve it to any caller
)

mcp_server = MCPServer(
    name="my-server",
    version="1.0.0",
    tools=my_tools,
    allowed_origins=("https://app.example.com",),
)

mcp_server = MCPServer(
    name="my-server",
    version="1.0.0",
    tools=my_tools,
    allowed_origins=("https://app.example.com",),
    require_origin=True,
)

from pydantic import BaseModel, Field

class ExecuteSQLInput(BaseModel):
    region: str = Field(
        description="The region to execute the query in",
        json_schema_extra={"x-mcp-header": "Region"},
    )
    query: str = Field(description="The SQL query to execute")

# app/tools/models.py
from pydantic import BaseModel, Field

class GreetInput(BaseModel):
    question: str = Field(description="The question to answer")

class GreetOutput(BaseModel):
    answer: str = Field(description="The answer to the question")

# Note: the description on Field will be passed when listing the tools.
# Having a description is optional, but it's recommended to provide one.

# app/tools/tools.py
from http_mcp.types import Arguments

from app.tools.models import GreetInput, GreetOutput

def greet(args: Arguments[GreetInput]) -> GreetOutput:
    return GreetOutput(answer=f"Hello, {args.inputs.question}!")

# app/tools/__init__.py

from http_mcp.types import Tool
from app.tools.models import GreetInput, GreetOutput
from app.tools.tools import greet

TOOLS = (
    Tool(
        func=greet,
        inputs=GreetInput,
        output=GreetOutput,
    ),
)

__all__ = ["TOOLS"]

# app/main.py
from starlette.applications import Starlette
from http_mcp.server import MCPServer
from app.tools import TOOLS

mcp_server = MCPServer(tools=TOOLS, name="test", version="1.0.0")

app = Starlette()
app.mount(
    "/mcp",
    mcp_server.app,
)

from datetime import UTC, datetime
from pydantic import BaseModel, Field
from http_mcp.types import Tool

class GetTimeOutput(BaseModel):
    time: str = Field(description="The current time")

async def get_time() -> GetTimeOutput:
    """Get the current time."""
    return GetTimeOutput(time=datetime.now(UTC).strftime("%H:%M:%S"))

TOOLS = (
    Tool(
        func=get_time,
        inputs=type(None),  # No arguments required
        output=GetTimeOutput,
    ),
)

from http_mcp.types import Arguments, NoArguments, Tool

class SimpleOutput(BaseModel):
    success: bool = Field(description="Whether the operation was successful")

def simple_tool(args: Arguments[NoArguments]) -> SimpleOutput:
    """A simple tool with no arguments."""
    # You can still access request and state
    context = args.get_state_key("context", Context)
    return SimpleOutput(success=True)

TOOLS = (
    Tool(
        func=simple_tool,
        inputs=NoArguments,
        output=SimpleOutput,
    ),
)

from pydantic import BaseModel, Field
from http_mcp.types import Arguments, Tool
from http_mcp.exceptions import ToolInvocationError

class RiskyToolInput(BaseModel):
    value: int = Field(description="An integer value")

class RiskyToolOutput(BaseModel):
    result: str = Field(description="The result of the operation")

def risky_tool(args: Arguments[RiskyToolInput]) -> RiskyToolOutput:
    """A tool that might fail."""
    if args.inputs.value < 0:
        raise ToolInvocationError("risky_tool", "Value must be positive")
    return RiskyToolOutput(result=f"Success: {args.inputs.value}")

TOOLS = (
    Tool(
        func=risky_tool,
        inputs=RiskyToolInput,
        output=RiskyToolOutput,
        return_error_message=True,  # Return ErrorMessage instead of raising
    ),
)

from http_mcp.exceptions import ToolInvocationError
from http_mcp.types import Arguments, NoArguments, Tool
from starlette.authentication import has_required_scope

class SecureOutput(BaseModel):
    message: str = Field(description="A secure message")

def private_tool(args: Arguments[NoArguments]) -> SecureOutput:
    """A tool that requires authentication."""
    if not has_required_scope(args.request, ("private",)):
        raise ToolInvocationError("private_tool", "Insufficient scope")
    return SecureOutput(message="This is private data")

def admin_tool(args: Arguments[NoArguments]) -> SecureOutput:
    """A tool that requires admin or superuser scope."""
    if not has_required_scope(args.request, ("admin", "superuser")):
        raise ToolInvocationError("admin_tool", "Insufficient scope")
    return SecureOutput(message="This is admin data")

TOOLS = (
    Tool(
        func=private_tool,
        inputs=NoArguments,
        output=SecureOutput,
        scopes=("private",),  # Only accessible with 'private' scope
    ),
    Tool(
        func=admin_tool,
        inputs=NoArguments,
        output=SecureOutput,
        scopes=("admin", "superuser"),  # Accessible with either scope
    ),
)

# app/context.py
from dataclasses import dataclass
import asyncpg

@dataclass
class AppContext:
    db: asyncpg.Pool

# app/main.py
import contextlib
import os
from collections.abc import AsyncIterator
from typing import TypedDict
import asyncpg
from starlette.applications import Starlette
from http_mcp.server import MCPServer
from app.context import AppContext

class State(TypedDict):
    ctx: AppContext

@contextlib.asynccontextmanager
async def lifespan(_app: Starlette) -> AsyncIterator[State]:
    pool = await asyncpg.create_pool(os.environ["DATABASE_URL"])
    yield {"ctx": AppContext(db=pool)}
    await pool.close()

mcp_server = MCPServer(tools=TOOLS, name="my-server", version="1.0.0")

app = Starlette(lifespan=lifespan)
app.mount("/mcp", mcp_server.app)

# app/tools.py
from pydantic import BaseModel, Field
from http_mcp.types import Arguments
from app.context import AppContext

class GetUserInput(BaseModel):
    user_id: int = Field(description="The user ID to look up")

class GetUserOutput(BaseModel):
    name: str = Field(description="The user's name")
    email: str = Field(description="The user's email")

async def get_user(args: Arguments[GetUserInput]) -> GetUserOutput:
    """Look up a user by ID."""
    ctx = args.get_state_key("ctx", AppContext)
    row = await ctx.db.fetchrow(
        "SELECT name, email FROM users WHERE id = $1",
        args.inputs.user_id,
    )
    return GetUserOutput(name=row["name"], email=row["email"])

# app/context.py
from dataclasses import dataclass
import httpx

@dataclass
class AppContext:
    http_client: httpx.AsyncClient

# app/main.py
import contextlib
from collections.abc import AsyncIterator
from typing import TypedDict
import httpx
from starlette.applications import Starlette
from http_mcp.server import MCPServer
from app.context import AppContext

class State(TypedDict):
    ctx: AppContext

@contextlib.asynccontextmanager
async def lifespan(_app: Starlette) -> AsyncIterator[State]:
    async with httpx.AsyncClient(
        base_url="https://api.example.com",
        headers={"Authorization": "Bearer <token>"},
    ) as client:
        yield {"ctx": AppContext(http_client=client)}

mcp_server = MCPServer(tools=TOOLS, name="my-server", version="1.0.0")

app = Starlette(lifespan=lifespan)
app.mount("/mcp", mcp_server.app)

# app/tools.py
from pydantic import BaseModel, Field
from http_mcp.types import Arguments
from app.context import AppContext

class SearchInput(BaseModel):
    query: str = Field(description="The search query")

class SearchOutput(BaseModel):
    results: list[str] = Field(description="Search result titles")

async def search(args: Arguments[SearchInput]) -> SearchOutput:
    """Search via an external API."""
    ctx = args.get_state_key("ctx", AppContext)
    resp = await ctx.http_client.get("/search", params={"q": args.inputs.query})
    resp.raise_for_status()
    return SearchOutput(results=[r["title"] for r in resp.json()["items"]])

# app/context.py
from dataclasses import dataclass, field

@dataclass
class AppContext:
    cache: dict[str, str] = field(default_factory=dict)
    request_count: int = 0

# app/tools.py
from pydantic import BaseModel, Field
from http_mcp.types import Arguments
from app.context import AppContext

class LookupInput(BaseModel):
    key: str = Field(description="The cache key to look up")

class LookupOutput(BaseModel):
    value: str | None = Field(description="The cached value, or null if not found")
    total_requests: int = Field(description="Total requests served")

async def lookup(args: Arguments[LookupInput]) -> LookupOutput:
    """Look up a value in the cache."""
    ctx = args.get_state_key("ctx", AppContext)
    ctx.request_count += 1
    return LookupOutput(
        value=ctx.cache.get(args.inputs.key),
        total_requests=ctx.request_count,
    )

from pydantic import BaseModel, Field
from http_mcp.types import Arguments

class MyToolArguments(BaseModel):
    question: str = Field(description="The question to answer")

class MyToolOutput(BaseModel):
    answer: str = Field(description="The answer to the question")


async def my_tool(args: Arguments[MyToolArguments]) -> MyToolOutput:
    # Access the request
    auth_header = args.request.headers.get("Authorization")
    ...

    return MyToolOutput(answer=f"Hello, {args.inputs.question}!")

# Use MCPServer:
from http_mcp.server import MCPServer

mcp_server = MCPServer(
    name="my-server",
    version="1.0.0",
    tools=(my_tool,),
)

from pydantic import BaseModel, Field

from http_mcp.types import Arguments, Prompt, PromptMessage, TextContent


class GetAdvice(BaseModel):
    topic: str = Field(description="The topic to get advice on")
    include_actionable_steps: bool = Field(
        description="Whether to include actionable steps in the advice", default=False
    )


def get_advice(args: Arguments[GetAdvice]) -> tuple[PromptMessage, ...]:
    """Get advice on a topic."""
    template = """
    You are a helpful assistant that can give advice on {topic}.
    """
    if args.inputs.include_actionable_steps:
        template += """
        The advice should include actionable steps.
        """
    return (
        PromptMessage(
            role="user",
            content=TextContent(
                text=template.format(topic=args.inputs.topic)
            ),
        ),
    )


PROMPTS = (
    Prompt(
        func=get_advice,
        arguments_type=GetAdvice,
    ),
)

from starlette.applications import Starlette

from app.prompts import PROMPTS
from http_mcp.server import MCPServer

app = Starlette()
mcp_server = MCPServer(tools=(), prompts=PROMPTS, name="test", version="1.0.0")

app.mount(
    "/mcp",
    mcp_server.app,
)

from http_mcp.types import Prompt, PromptMessage, TextContent

def help_prompt() -> tuple[PromptMessage, ...]:
    """Use this prompt to get general help."""
    return (
        PromptMessage(
            role="user",
            content=TextContent(
                text="You are a helpful assistant. Help the user with their task."
            ),
        ),
    )

PROMPTS = (
    Prompt(
        func=help_prompt,
        arguments_type=type(None),  # No arguments required
    ),
)

from http_mcp.types import Arguments, NoArguments, Prompt, PromptMessage, TextContent

def help_prompt_with_context(args: Arguments[NoArguments]) -> tuple[PromptMessage, ...]:
    """Use this prompt to get help with access to context."""
    # You can still access request and state
    context = args.get_state_key("context", Context)
    return (
        PromptMessage(
            role="user",
            content=TextContent(text="You are a helpful assistant."),
        ),
    )

PROMPTS = (
    Prompt(
        func=help_prompt_with_context,
        arguments_type=NoArguments,
    ),
)

from pydantic import BaseModel, Field
from http_mcp.types import Arguments, Prompt, PromptMessage, TextContent
from app.context import Context

class GetAdvice(BaseModel):
    topic: str = Field(description="The topic to get advice on")

def get_advice_with_context(args: Arguments[GetAdvice]) -> tuple[PromptMessage, ...]:
    """Get advice on a topic with context awareness."""
    # Access the context from lifespan state
    context = args.get_state_key("context", Context)
    called_tools = context.get_called_tools()
    template = """
    You are a helpful assistant that can give advice on {topic}.
    Previously called tools: {tools}
    """

    return (
        PromptMessage(
            role="user",
            content=TextContent(
                text=template.format(
                    topic=args.inputs.topic,
                    tools=", ".join(called_tools) if called_tools else "none"
                )
            )
        ),
    )

PROMPTS_WITH_CONTEXT = (
    Prompt(
        func=get_advice_with_context,
        arguments_type=GetAdvice,
    ),
)

from http_mcp.types import Arguments, NoArguments, Prompt, PromptMessage, TextContent

def private_prompt(args: Arguments[NoArguments]) -> tuple[PromptMessage, ...]:
    """Private prompt that is only accessible to authenticated users."""
    return (
        PromptMessage(
            role="user",
            content=TextContent(text="This is a private prompt."),
        ),
    )

def admin_prompt(args: Arguments[NoArguments]) -> tuple[PromptMessage, ...]:
    """Admin prompt accessible to users with admin or superuser scope."""
    return (
        PromptMessage(
            role="user",
            content=TextContent(text="This is an admin prompt."),
        ),
    )

PROMPTS = (
    Prompt(
        func=private_prompt,
        arguments_type=NoArguments,
        scopes=("private",),  # Only accessible with 'private' scope
    ),
    Prompt(
        func=admin_prompt,
        arguments_type=NoArguments,
        scopes=("admin", "superuser"),  # Accessible with either scope
    ),
)

import asyncio
import os
from http_mcp.server import MCPServer
from app.tools import TOOLS
from app.prompts import PROMPTS

mcp_server = MCPServer(
    tools=TOOLS,
    prompts=PROMPTS,
    name="test",
    version="1.0.0"
)

# Run the server with STDIO transport
async def main() -> None:
    request_headers = {
        "Authorization": f"Bearer {os.getenv('MCP_TOKEN', '')}",
        "X-Custom-Header": "value",
    }
    await mcp_server.serve_stdio(request_headers)

asyncio.run(main())

import contextlib
from collections.abc import AsyncIterator
from typing import TypedDict
from starlette.applications import Starlette
from starlette.authentication import (
    AuthCredentials,
    AuthenticationBackend,
    BaseUser,
    SimpleUser,
)
from starlette.middleware import Middleware
from starlette.middleware.authentication import AuthenticationMiddleware
from starlette.requests import HTTPConnection

from http_mcp.server import MCPServer
from app.context import Context
from app.tools import TOOLS
from app.prompts import PROMPTS


class BasicAuthBackend(AuthenticationBackend):
    def __init__(self, granted_scopes: tuple[str, ...] = ("authenticated",)) -> None:
        self.granted_scopes = granted_scopes
        super().__init__()

    async def authenticate(
        self, conn: HTTPConnection
    ) -> tuple[AuthCredentials, BaseUser] | None:
        # Implement your authentication logic here
        # For example, check Bearer token, API key, etc.
        auth_header = conn.headers.get("Authorization")
        if not auth_header:
            return None

        # Validate token and return credentials with scopes
        return AuthCredentials(self.granted_scopes), SimpleUser("username")


class State(TypedDict):
    context: Context


@contextlib.asynccontextmanager
async def lifespan(_app: Starlette) -> AsyncIterator[State]:
    yield {"context": Context()}


mcp_server = MCPServer(
    tools=TOOLS,
    prompts=PROMPTS,
    name="test",
    version="1.0.0"
)

app = Starlette(
    lifespan=lifespan,
    middleware=[
        Middleware(
            AuthenticationMiddleware,
            backend=BasicAuthBackend(granted_scopes=("private", "admin")),
        ),
    ],
)
app.mount("/mcp", mcp_server.app)

from http_mcp.types import NoArguments

# Use this instead of type(None)
Tool(func=my_func, inputs=NoArguments, output=MyOutput)

pip install http-mcp[auth]

from http_mcp.server import MCPServer
from auth_mcp.resource_server import (
    ProtectedMCPAppConfig,
    TokenInfo,
    TokenValidator,
    create_protected_mcp_app,
)
from auth_mcp.types import ProtectedResourceMetadata


class MyTokenValidator(TokenValidator):
    async def validate_token(
        self, token: str, resource: str | None = None
    ) -> TokenInfo | None:
        # Validate against your authorization server
        ...


mcp_server = MCPServer(name="my-server", version="1.0.0", tools=MY_TOOLS)

config = ProtectedMCPAppConfig(
    mcp_server=mcp_server,
    token_validator=MyTokenValidator(),
    resource_endpoint=ProtectedResourceMetadata(
        resource="https://mcp.example.com",
        authorization_servers=("https://auth.example.com",),
    ),
)

app = create_protected_mcp_app(config)

pip install http-mcp

pip install http-mcp[auth]

uv add http-mcp