upload_image

MCP tool from Substack MCP by conorbronsdon

Upload an image to Substack's CDN — returns a publicly-fetchable (unlisted) URL

How to use it

Project documentation lists upload_image for the Substack MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), then check which tools your installed version makes available. Tool availability can depend on configuration and credentials. A server handshake does not verify this tool’s behavior. See the full listing for setup details.

Install Substack MCP

$npx --package @conorbronsdon/substack-mcp substack-mcp-login https://yourblog.substack.com
FULL SUBSTACK MCP LISTING

Other tools in Substack MCP (13)

create_draft

Create a new draft from markdown (private)

create_note

Publish a Substack Note (short-form, publishes immediately)

create_note_with_link

Publish a Note with a link card attachment (publishes immediately)

get_draft

Get full content of a draft by ID

get_post

Get full content of a published post by ID

get_post_analytics

Get a published post's stats (views, opens, signups, subscribes, reactions) by ID

get_post_comments

Get comments on a published post

get_sections

List your publication's sections (categories) with their IDs

get_subscriber_count

Get your publication's current subscriber count

list_drafts

List draft posts

list_published_posts

List published posts with pagination

list_scheduled_posts

List posts scheduled for future publication (read-only; scheduling stays in Substack's editor)

update_draft

Update an existing draft (unpublished only; private)