Cadence
Send RCS messages from your agent and get typed replies. Automatic SMS fallback.
Install
registry version 0.3.1
npm
npx -y @cadencercs/mcpnpm
npx -y @cadencercs/mcp@0.3.1
Setup by client
Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.
claude_desktop_config.json
{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp@0.3.1"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}Format verified against the official Claude Desktop docs ↗.
terminal
claude mcp add --env CADENCE_API_KEY=<YOUR_CADENCE_API_KEY> cadence -- npx -y @cadencercs/mcp
claude mcp add --env CADENCE_API_KEY=<YOUR_CADENCE_API_KEY> cadence -- npx -y @cadencercs/mcp@0.3.1
Format verified against the official Claude Code docs ↗.
.cursor/mcp.json
{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp@0.3.1"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}Format verified against the official Cursor docs ↗.
.vscode/mcp.json
{
"servers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}{
"servers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp@0.3.1"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}Format verified against the official VS Code docs ↗.
mcp_config.json
{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}{
"mcpServers": {
"cadence": {
"command": "npx",
"args": [
"-y",
"@cadencercs/mcp@0.3.1"
],
"env": {
"CADENCE_API_KEY": "<YOUR_CADENCE_API_KEY>"
}
}
}
}Format verified against the official Windsurf docs ↗.
Environment variables
Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.
CADENCE_API_KEYrequired secret — Your Cadence API key. A sandbox key (sk_sandbox_…) simulates delivery end to end and reaches no handset; a live key sends real messages. Get one free at https://cadencercs.com/app.html — no card, no compliance wait.CADENCE_ALLOW_IRREVERSIBLE— Set to 1 to expose the three one-way-door tools: sync_google, request_verification and request_launch. They create an agent at Google that can never be deleted, and freeze the launch questionnaire. Left unset they are abCADENCE_API_URL— Override the API host. Defaults to https://api.cadencercs.com.
About this server
Distributed as npm, listed under Communication. Review our MCP security guide before granting access to real data.
Frequently asked questions
How do I install Cadence?
Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.
Is Cadence free to use?
The MCP server itself is free to install. The source is public on https://github.com/dwixom/rcs-agent-mvp. Any third-party service it calls may require its own API key and account.
Which clients support Cadence?
Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.
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