Current, source-cited US tax constants & calculators for AI agents (2026). MCP server. Every response cites its IRS/SSA primary source.
Quick Install
Copy the config for your editor. Some servers may need additional setup — check the README.
Add to claude_desktop_config.json:
{
"mcpServers": {
"verified-numbers-mcp": {
"command": "npx",
"args": [
"-y",
"jfortier93/verified-numbers-mcp"
]
}
}
}
Run in terminal:
claude mcp add verified-numbers-mcp npx -y jfortier93/verified-numbers-mcp
Add to .cursor/mcp.json:
{
"mcpServers": {
"verified-numbers-mcp": {
"command": "npx",
"args": [
"-y",
"jfortier93/verified-numbers-mcp"
]
}
}
}