Shared visual canvas (Excalidraw) for collaborative whiteboarding between AI agents and humans.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add napkin-sshwarts --env ANTHROPIC_API_KEY='<ANTHROPIC_API_KEY>' -- npx -y napkin-mcp~/.codex/config.toml
[mcp_servers.napkin-sshwarts]
command = "npx"
args = ["-y", "napkin-mcp"]
env = { ANTHROPIC_API_KEY = "<ANTHROPIC_API_KEY>" }
# codex mcp add napkin-sshwarts --env ANTHROPIC_API_KEY='<ANTHROPIC_API_KEY>' -- npx -y napkin-mcp~/.cursor/mcp.json
{
"mcpServers": {
"napkin-sshwarts": {
"command": "npx",
"args": [
"-y",
"napkin-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"napkin-sshwarts": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"napkin-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"napkin-sshwarts": {
"command": "npx",
"args": [
"-y",
"napkin-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"napkin-sshwarts": {
"command": "npx",
"args": [
"-y",
"napkin-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"napkin-sshwarts": {
"command": "npx",
"args": [
"-y",
"napkin-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>"
}
}
}
}Environment variables
ANTHROPIC_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.