slack/web-api canvases.create - type error on channel_id

[carter293]

The method canvases.create is missing the property channel_id from the API Reference.

Packages:

Select all that apply:

• @slack/web-api
• @slack/rtm-api
• @slack/webhooks
• @slack/oauth
• @slack/socket-mode
• @slack/types
• I don't know

Reproducible in:

The Slack SDK version

"slack/web-api": "^7.13.0",

Node.js runtime version

v20.19.4

OS info

ProductName: macOS
ProductVersion: 26.2
BuildVersion: 25C56
Darwin Kernel Version 25.2.0: Tue Nov 18 21:09:56 PST 2025; root:xnu-12377.61.12~1/RELEASE_ARM64_T6041

Steps to reproduce:

1. Try to create a channel canvas using client.conversations.canvases.create with a channel_id

const canvasResponse = await slackClient.canvases.create({
      channel_id: channelId,
      title: 'My canvas title',
      document_content: {
        type: 'markdown',
        markdown: canvasMd,
      }
    });

2. Get a type error

Object literal may only specify known properties, and 'channel_id' does not exist in type 'TokenOverridable & { title?: string | undefined; document_content?: DocumentContent | undefined; }'.ts(2353)

Expected result:

Title should be an accepted param according to the API Reference

Actual result:

Object literal may only specify known properties, and 'channel_id' does not exist in type 'TokenOverridable & { title?: string | undefined; document_content?: DocumentContent | undefined; }'.ts(2353)

[zimeg]

Hey @carter293! 👋 Thanks for sharing this with us!

At glance it seems that the canvases.create method is being used instead of the conversations.cavases.create method 🔍

The latter might be useful for creating channel canvases while the canvases.create method is for standalone canvases 📚