MCP Invoke

The MCP Invoke Snap is a Snap to perform operations such as calling a tool, listing resources, and reading resources to get results on an MCP server.

Prerequisites

• A valid MCP SSE Account with required fields provided.

Snap views

View	Description	Examples of upstream and downstream snaps
Input	The Snap supports a maximum of one document input view.	Mapper
Output	This Snap supports exactly two document output views. The First view is a passthrough of the input document for further processing downstream The second output view is the actual agent visualizer log that is being visualized	OpenAI Function Result Generator Azure OpenAI Function Result Generator Google GenAI Function Result Generator Amazon Bedrock Function Result Generator
Error	Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter when running the pipeline by choosing on eof the following options from the When errors occur list under the Views tab. The available options are: Stop Pipeline Execution Stops the current pipeline execution when an error occurs. Discard Error Data and Continue Ignores the error, discards that record, and continues with the remaining records. Route Error Data to Error View Routes the error data to an error view without stopping the Snap execution. Learn more about Error handling in Pipelines.

Snap settings

Legend:

• Expression icon(): Allows using JavaScript syntax to access SnapLogic Expressions to set field values dynamicall (if enabled). If disabled, you can provide a static value. Learn more.
• SnapGPT (): Generates SnapLogic Expressions based on natural language using SnapGPT. Learn more.
• Suggestion icon (): Populates a list of values dynamically based on your Snap configuration. You can select only one attribute at a time using the icon. Type into the field if it supports a comma-separated list of values.
• Upload (): Uploads files. Learn more.

Field / Field set	Type	Description
Label	String	Required. Specify a unique name for the Snap. Modify this to be more appropriate, esepcially if more than one of the same Snaps is in the pipeline. Default value: MCP Invoke Example: Firecrawl MCP Server
Operation	String/Expression	Required. Specify the operation to perform for the current input. Operation can be one of tools/call, resources/read, or resources/list. The operation is provided within the sl_metadata if used with the MCP Function Generator Snap. Default value: tools/call
Tool Name	String/Expression	The name of the tool to be called. Enabled if the "Operation" is tools/call or is an expression. Example: $function.name
Parameters	String/Expression	The "tool call" or "read resource" parameters to be used for the operation. Enabled if the "Operation" is tools/call, resources/read, or is an expression. Example: $function.json_arguments