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Question

Codex with Lucid MCO

  • March 24, 2026
  • 4 replies
  • 34 views
P
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Tried to add the codex with Lucid MCP Url 

 

  • Login works with Codex 
  • It return sucess - Authentication complete. You may close this window.

  • Successfully logged in to MCP server 'lucid'.

But getting follow error 

MCP client for `lucid` failed to start: MCP startup failed: handshaking with MCP server failed: Send message error

  Transport

  [rmcp::transport::worker::WorkerTransport<rmcp::transport::streamable_http_client::StreamableHttpClientWorker<rmcp::tr

  ansport::auth::AuthClient<reqwest::async_impl::client::Client>>>] error: Transport channel closed, when send

  initialized notification

Comments

C
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  • Caden E
  • Lucid product team
  • March 24, 2026

Hi Priteshostwal,

It looks like there’s a bug in the Rust MCP client library. We’re working on a workaround.

Jake B
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  • Jake B
  • Lucid product team
  • March 25, 2026

Thanks for reporting this!  We believe we found and fixed the issue.  Could you try connecting the Lucid MCP server to Codex again, and let us know if it’s working for you now?  

P
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Looks like now its working, But got another problem 

 

What I cannot do cleanly through this MCP:

  • use Lucidchart’s native Azure shape library/stencil directly
  • drag/drop Microsoft Azure SVG icons into the Lucid canvas the way a human would in the UI

Why:

  • the lucid_create_diagram_from_specification tool supports Lucid standard shapes and layout primitives
  • it does not expose Lucid’s Azure library picker/stencil browser
Jake B
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  • Jake B
  • Lucid product team
  • March 27, 2026

Looks like now its working, But got another problem 

 

What I cannot do cleanly through this MCP:

  • use Lucidchart’s native Azure shape library/stencil directly
  • drag/drop Microsoft Azure SVG icons into the Lucid canvas the way a human would in the UI

Why:

  • the lucid_create_diagram_from_specification tool supports Lucid standard shapes and layout primitives
  • it does not expose Lucid’s Azure library picker/stencil browser

Thanks for the feedback.  That’s a known limitation right now, but we’re looking to add those shapes soon!

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