Azure Service Bus Server

An MCP (Model Context Protocol) server for Azure Service Bus. Compatible with any MCP client — Claude Code, Claude Desktop, Cursor, and others.

Exposes tools for sending messages, inspecting queue and subscription contents, and purging test data. The built-in Azure MCP server that ships with Claude Code only supports read operations (queue details, message counts, etc.) and cannot send messages — this project fills that gap.

Authentication uses DefaultAzureCredential, which picks up an active az login session automatically. Alternatively, a connection string can be provided via the AZURE_SERVICEBUS_CONNECTION_STRING environment variable. No secrets or connection strings are ever passed as tool arguments.

Requirements

• uv
• Azure CLI with an active az login session, or AZURE_SERVICEBUS_CONNECTION_STRING set in your environment
• Your identity must have the Azure Service Bus Data Owner or Azure Service Bus Data Receiver/Sender roles on the target namespace

Installation

Install uv if you don't have it:

macOS

brew install uv azure-cli

Linux

curl -LsSf https://astral.sh/uv/install.sh | sh
curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash   # Debian/Ubuntu

For other Linux distributions see the Azure CLI install docs.

Windows

winget install --id=astral-sh.uv
winget install --id=Microsoft.AzureCLI

Configuration

Claude Code users:

claude mcp add --scope user azure-service-bus -- uvx servicebus-mcp

For other MCP clients, add the following to your server configuration:

{
  "mcpServers": {
    "azure-service-bus": {
      "command": "uvx",
      "args": ["servicebus-mcp"]
    }
  }
}

Restart your MCP client after adding the server. No environment variables are required if you are authenticated with az login. Optional env vars:

• AZURE_SUBSCRIPTION_ID — used by servicebus_list_namespaces if set
• AZURE_SERVICEBUS_CONNECTION_STRING — use instead of az login for data plane operations (send, peek, purge)

Installing from source

If you prefer to run from a local clone:

git clone https://github.com/BrianDeacon/servicebus-mcp
cd servicebus-mcp
uv sync
az login

Then configure with the cloned path:

{
  "mcpServers": {
    "azure-service-bus": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/servicebus-mcp", "servicebus-mcp"]
    }
  }
}

Restart your MCP client after adding the server.

Tools

The namespace parameter accepts either a short name (my-namespace) or a fully qualified hostname (my-namespace.servicebus.windows.net). The .servicebus.windows.net suffix is appended automatically if absent.

servicebus_list_namespaces

List all Service Bus namespaces in the current Azure subscription. The subscription is resolved automatically — first from the AZURE_SUBSCRIPTION_ID environment variable, then from the active az login session.

servicebus_list_queues

List all queues in a Service Bus namespace.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace

Returns a sorted JSON array of queue names.

servicebus_list_topics

List all topics in a Service Bus namespace.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
include_subscriptions	boolean	no	If true, returns a map of topic name → sorted array of subscription names (default false)

servicebus_send_message

Send a single message to a queue or topic.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue or topic name
body	string	yes	Message body (typically JSON, sent as-is)
session_id	string	no	Required for session-enabled queues
correlation_id	string	no	Correlation ID to set on the message
application_properties	object	no	Key/value map of custom message properties
scheduled_enqueue_time	string	no	ISO 8601 datetime to enqueue the message (e.g. 2026-03-05T10:00:00Z). If omitted, the message is sent immediately.

Returns a success message confirming the message was sent or scheduled.

servicebus_send_batch

Send multiple messages in a single batch. Useful for seeding test data.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue or topic name
messages	array	yes	Array of message objects, each with body (required), session_id, correlation_id, application_properties, and scheduled_enqueue_time (all optional)

servicebus_peek_messages

Non-destructively peek at messages in a queue. Messages are not locked or consumed.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
max_count	integer	no	Max messages to return (default 10, max 100)
session_id	string	no	Peek within a specific session. If omitted on a session-enabled queue, the next available session is accepted, peeked, and immediately released. The session ID is included in each returned message, so you can use it for subsequent targeted calls.

Returns message bodies and metadata (sequence number, enqueue time, properties). Use servicebus_peek_messages_to_file instead if message bodies may be large.

servicebus_peek_messages_to_file

Same as servicebus_peek_messages but writes message bodies to a file. Only metadata is returned in context, avoiding large payloads filling the context window.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
output_file	string	yes	Path to write message bodies as JSON
max_count	integer	no	Max messages to return (default 10, max 100)
session_id	string	no	Peek within a specific session. If omitted on a session-enabled queue, the next available session is accepted, peeked, and immediately released.

servicebus_peek_dlq

Non-destructively peek at messages in a queue's dead letter queue.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
max_count	integer	no	Max messages to return (default 10, max 100)

Returns message bodies, dead letter reason, error description, and other metadata.

servicebus_peek_dlq_to_file

Same as servicebus_peek_dlq but writes message bodies to a file.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
output_file	string	yes	Path to write message bodies as JSON
max_count	integer	no	Max messages to return (default 10, max 100)

servicebus_purge_queue

Delete all messages from a queue. This is destructive and cannot be undone.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
max_messages	integer	no	Safety cap — stops and leaves remaining messages untouched if the running total exceeds this (default 1000)

servicebus_purge_dlq

Delete all messages from a queue's dead letter queue. This is destructive and cannot be undone.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
max_messages	integer	no	Safety cap — stops and leaves remaining messages untouched if the running total exceeds this (default 1000)

servicebus_requeue_dlq

Move messages from a queue's dead letter queue back to the main queue. Preserves body, session ID, correlation ID, and application properties.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
queue	string	yes	Queue name
max_messages	integer	no	Stops if the running total would exceed this (default 100)

servicebus_peek_subscription_messages

Non-destructively peek at messages in a topic subscription.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
max_count	integer	no	Max messages to return (default 10, max 100)
session_id	string	no	Peek within a specific session. If omitted on a session-enabled subscription, the next available session is accepted, peeked, and immediately released.

servicebus_peek_subscription_messages_to_file

Same as servicebus_peek_subscription_messages but writes message bodies to a file.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
output_file	string	yes	Path to write message bodies as JSON
max_count	integer	no	Max messages to return (default 10, max 100)
session_id	string	no	Peek within a specific session. If omitted on a session-enabled subscription, the next available session is accepted, peeked, and immediately released.

servicebus_peek_subscription_dlq

Non-destructively peek at messages in a topic subscription's dead letter queue.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
max_count	integer	no	Max messages to return (default 10, max 100)

servicebus_peek_subscription_dlq_to_file

Same as servicebus_peek_subscription_dlq but writes message bodies to a file.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
output_file	string	yes	Path to write message bodies as JSON
max_count	integer	no	Max messages to return (default 10, max 100)

servicebus_purge_subscription

Delete all messages from a topic subscription. This is destructive and cannot be undone.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
max_messages	integer	no	Safety cap — stops and leaves remaining messages untouched if the running total exceeds this (default 1000)

servicebus_purge_subscription_dlq

Delete all messages from a topic subscription's dead letter queue. This is destructive and cannot be undone.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
max_messages	integer	no	Safety cap — stops and leaves remaining messages untouched if the running total exceeds this (default 1000)

servicebus_requeue_subscription_dlq

Move messages from a topic subscription's dead letter queue back to the topic. Preserves body, session ID, correlation ID, and application properties.

Parameter	Type	Required	Description
namespace	string	yes	Service Bus namespace
topic	string	yes	Topic name
subscription	string	yes	Subscription name
max_messages	integer	no	Stops if the running total would exceed this (default 100)

Security

• This server only accepts DefaultAzureCredential — connection strings and SAS keys are never passed as arguments, ensuring secrets do not appear in conversation history.
• purge_* and requeue_* tools enforce a max_messages safety cap to prevent accidental bulk operations on large backlogs.