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Resources are read-only data exposed by the server. A resource might be a file, a generated report, or any other content the server can provide without side effects.

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List resources

from dedalus_mcp.client import open_connection

async with open_connection("http://127.0.0.1:8000/mcp") as client:
    resources = await client.list_resources()

    for r in resources.resources:
        print(f"{r.uri}: {r.name}")

​
Resource schema

Each resource includes:
FieldTypeDescription
uristrResource identifier (e.g. resource://config/app)
namestrHuman-readable name
descriptionstr | NoneWhat the resource contains
mimeTypestr | NoneContent type (e.g. application/json)
for r in resources.resources:
    print(f"URI: {r.uri}")
    print(f"Name: {r.name}")
    print(f"Type: {r.mimeType}")

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Read resources

Read a specific resource by URI: 
result = await client.read_resource("resource://config/app")
result is a ReadResourceResult with a contents list. It can contain TextResourceContents (text) or BlobResourceContents (base64 blob).

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Response structure (text vs binary)

import base64
from dedalus_mcp import types

result = await client.read_resource("resource://data/report")

if not result.contents:
    print("No contents (resource missing or empty)")
else:
    item = result.contents[0]

    if isinstance(item, types.TextResourceContents):
        print(item.text)

    elif isinstance(item, types.BlobResourceContents):
        data = base64.b64decode(item.blob)  # blob is base64 text
        with open("output.bin", "wb") as f:
            f.write(data)

​
Example: Configuration reader

import json
from dedalus_mcp.client import open_connection
from dedalus_mcp import types

async with open_connection("http://127.0.0.1:8000/mcp") as client:
    resources = await client.list_resources()
    print("Available resources:")
    for r in resources.resources:
        print(f"  - {r.uri} ({r.mimeType})")

    result = await client.read_resource("resource://config/app")
    if not result.contents or not isinstance(result.contents[0], types.TextResourceContents):
        raise RuntimeError("Expected text config resource")

    data = json.loads(result.contents[0].text)
    print(f"App config: {data}")

​
Resource templates

Resource templates are just “patterns” a server can publish (like resource://users/) to show what kinds of resource URLs exist. They don’t automatically create resources—to read something, you still call read_resource(…) with a real URL (like resource://users/123), and it only works if the server actually serves that exact URI.

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Context manager

Again, open_connection(...) is an async context manager. It means you don’t have to remember to call await client.close(). When the async with block exits, it automatically closes the underlying connection for you. 
from dedalus_mcp.client import open_connection

async with open_connection("http://127.0.0.1:8000/mcp") as client:
    resources = await client.list_resources()
    result = await client.read_resource("resource://docs/readme")
Last modified on February 28, 2026