This release is a pre-release and may not be stable for production use.
node-wire-slack
Slack connector for Node Wire. Lets an agent or app post messages to channels, send direct messages to users, and upload files, using a Slack bot token.
Part of Node Wire. Every call runs through the Node Wire runtime, so it gets input validation, retries with a circuit breaker, scope policy, a shared error taxonomy, and OpenTelemetry tracing. A Node Wire host exposes each action over REST, gRPC and MCP.
Install
pip install node-wire-slack
This pulls in node-wire-runtime. Pre-releases
are published as X.Y.ZbN; install one with pip install --pre node-wire-slack. To install
every connector at once, use node-wire-connectors.
Wheels are compiled with Cython and contain no Python source. They are built for CPython 3.11, 3.12 and 3.13 on Linux x86_64 (manylinux and musllinux), macOS arm64 and Windows x64.
Actions
The connector registers as slack. MCP tool names are <connector_id>_<action>, with
dots replaced by underscores.
| Action | MCP tool | What it does |
|---|---|---|
post_message |
slack_post_message |
Posts a message, with optional Block Kit blocks, to a channel ID, #channel-name or user |
send_direct_message |
slack_send_direct_message |
Sends a private message to a user, opening the DM if needed |
upload_file |
slack_upload_file |
Uploads a file (base64 content, or a file from the attachments directory) and shares it to a channel or DM |
Configuration
Add the connector to config/connectors.yaml:
connectors:
slack:
enabled: true
exposed_via: ["rest", "grpc", "mcp"]
auth:
provider: static_token
secret_key: SLACK_BOT_TOKEN
Secrets are read through the configured secret provider (environment variables by default):
| Variable | Purpose |
|---|---|
SLACK_BOT_TOKEN |
Bot user OAuth token (xoxb-...). Needs the chat:write, files:write and im:write scopes |
NW_SLACK_ATTACHMENTS_DIR |
Optional. The only directory upload_file may read from disk (default /slack_attachments) |
NW_SLACK_UPLOAD_LIMIT_MB |
Optional. Largest file upload_file accepts, in MB (default 50, capped at 100) |
Usage
Set NW_ALLOWED_CONNECTORS=slack (comma-separate several). Node Wire loads only the
connectors listed there, and discovers them through the node_wire.connectors entry point.
A Node Wire host (the REST, gRPC or MCP server, or ConnectorFactory) then builds the connector
from the configuration above. See Use a connector.
Security notes
upload_file reads local files only from inside NW_SLACK_ATTACHMENTS_DIR. The path must be
absolute, and is refused if it resolves outside that directory, including through a symlink.
Documentation
- Node Wire on GitHub: source, issues and full documentation
- Slack setup guide: bot setup, channel resolution and error codes
- Connector reference
- Configuration
- Error codes
- Changelog
License
Apache-2.0. See LICENSE.
Metadata
Release files for node-wire-slack 1.0.0b1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Built distributions (wheels)
Total release size: 6.0 MB
Release files / node_wire_slack-1.0.0b1-cp313-cp313-win_amd64.whl
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| Size | 131.3 kB |
| Tags | CPython 3.13 Windows x86-64 |
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