Install ONCE in Claude Code
claude mcp add --transport http gsterlingpress-once https://optimistic-compassion-production.up.railway.app/mcp{
"mcpServers": {
"gsterlingpress-once": {
"url": "https://optimistic-compassion-production.up.railway.app/mcp"
}
}
}Frequently asked questions
What does the ONCE MCP server do?
Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.
Is the ONCE MCP server free?
The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.
Does ONCE run locally or remotely?
Remote. Hosted by the provider. You connect with a URL, nothing to install.
How do I add ONCE to Claude Code?
Run: claude mcp add --transport http gsterlingpress-once https://optimistic-compassion-production.up.railway.app/mcp
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