Skip to content

[DOC] Fix example usage of get_context (plus a little more) #801

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 3 commits into
base: main
Choose a base branch
from
+5 −4
Open

[DOC] Fix example usage of get_context (plus a little more) #801

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
edd8ea1
docs: fix incorrect usage example re get_context()
May 24, 2025
759f276
fix: fix problem with get_context example
May 24, 2025
f9a08e8
lint: removed unused import
May 24, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 5 additions & 4 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ from dataclasses import dataclass

from fake_database import Database # Replace with your actual DB type

from mcp.server.fastmcp import Context, FastMCP
from mcp.server.fastmcp import FastMCP

# Create a named server
mcp = FastMCP("My App")
Expand Down Expand Up @@ -192,9 +192,10 @@ mcp = FastMCP("My App", lifespan=app_lifespan)

# Access type-safe lifespan context in tools
@mcp.tool()
def query_db(ctx: Context) -> str:
def query_db() -> str:
"""Tool that uses initialized resources"""
db = ctx.request_context.lifespan_context.db
ctx = mcp.get_context()
db = ctx.request_context.lifespan_context["db"]
return db.query()
```

Expand Down Expand Up @@ -631,7 +632,7 @@ server = Server("example-server", lifespan=server_lifespan)
# Access lifespan context in handlers
@server.call_tool()
async def query_db(name: str, arguments: dict) -> list:
ctx = server.get_context()
ctx = server.request_context
db = ctx.lifespan_context["db"]
return await db.query(arguments["query"])
```
Expand Down
Loading