MCP Tool Call Node
Overview
The Model Context Protocol (MCP) enables communication with MCP-compliant servers through either HTTP or Stdio transports.
The MCP Tool Call Node enables the ability to call a function on an MCP server. MCP Tools.
For all communication purposes the MCP Tool Call Node follows the precedent of the MCP Discovery Node.
Please refer to the MCP Discovery Node for all MCP communication configuration details.
This page is dedicated to MCP Tool Call Node specific details only.
- Inputs
- Outputs
- Editor Settings
Inputs
| Title | Data Type | Description | Default Value | Notes |
|---|---|---|---|---|
| Name | string | The name for the MCP Client instance | mcp-tool-call-client | Standard required parameter for an MCP Client |
| Version | string | The version for the MCP Client instance | 1.0.0 | Standard required parameter for an MCP Client |
| Server URL (HTTP) | string | The endpoint URL for the MCP server | None | Only available when using HTTP mode with Server URL Input enabled |
| Tool Name | string | The name for the tool to call | None | The string should match the tool name retrived from the server |
| Tool Arguments | object | The arguments to supply to the tool call | None | The arguments should be a JSON parsable and correct shape based on the MCP schema |
| Tool ID | string | The ID associated with the tool call | None | This is passthrough input to help with message history consistency |
Outputs
| Title | Data Type | Description |
|---|---|---|
| Response | object | Result response returned from the tool call |
| Tool ID | string | The ID associated with the tool call |
Editor Settings
| Setting | Description | Default Value | Use Input Toggle | Input Data Type |
|---|---|---|---|---|
| Name | The name to use for the MCP Client instance | mcp-tool-call-client | Yes | string |
| Version | The version to use for the MCP Client instance | 1.0.0 | Yes | string |
| Transport Type | The mode of communication with the MCP server (HTTP or STDIO) | STDIO | No | N/A |
| Server URL | The endpoint URL for the MCP server (Only HTTP) | http://localhost:8080/mcp | Yes | string |
| Server ID | The MCP server ID from configuration (Only STDIO) | (empty) | No | N/A |
| Tool Name | The name for the tool to call | None | Yes | string |
| Tool Arguments | The arguments to supply to the tool call | { "key": "value", } | Yes | object |
| Tool ID | The ID for the tool call | None | Yes | string |