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Question

MCP lucid_create_diagram_from_specification tool hitting size issue

  • June 1, 2026
  • 1 reply
  • 36 views

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Error POSTing to endpoint (HTTP 400): Request body too large (max 53KB). JSON-RPC error code: -32602.

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  • Lucid support team
  • June 15, 2026

Hi ​@Umansh Sarabhai,

 

Thank you for posting in the Lucid Community! To get a better idea of the issue you are running into can you please provide the following information: 

  • Did this occur on a Lucidchart or Lucidspark board? 
  • Which MCP client (LLM) are you using?
  • Any screenshots of the flow when reproducing this error.

I appreciate your help looking into this further.