Synergic APIsSynergic APIs

MCP server

Your AI agent, wired to official US data.

The official Synergic APIs MCP server gives Claude, Cursor, and any Model Context Protocol client live access to US inflation (CPI since 1913), famous average prices and the national debt to the penny — with your API key, over one npx command.

Get a free API key Set it up in 2 minutes

500 req/mo · No credit card required

Setup

Set it up in 2 minutes

Add the server to your MCP client config and set your key. That's it — no clone, no build. Get a free API key at synergicapis.com/signup.html (no credit card).

Claude Desktop & Cursor

claude_desktop_config.json · ~/.cursor/mcp.json 
{
  "mcpServers": {
    "synergic-apis": {
      "command": "npx",
      "args": ["-y", "@synergic-apis/mcp"],
      "env": { "SYNERGIC_API_KEY": "YOUR_API_KEY" }
    }
  }
}

Claude Code

terminal 
claude mcp add synergic-apis --env SYNERGIC_API_KEY=YOUR_API_KEY -- npx -y @synergic-apis/mcp

Then ask your assistant things like “What is US inflation right now?”, “Plot egg prices since 2020” or “How much did the national debt grow this year?”.

Tools

The 8 tools

US inflation (CPI)

3 tools

TOOLget_us_inflation_latest

Latest CPI of all 11 categories with YoY/MoM rates, NSA or seasonally adjusted.

TOOLget_us_inflation_history

Monthly CPI history of one category — headline back to 1913.

TOOLget_us_inflation_annual

Official annual average CPI (the BLS M13 rows); the whole headline series in one call.

National debt & rates

3 tools

TOOLget_us_debt_latest

The US national debt today, to the penny (U.S. Treasury).

TOOLget_us_debt_history

Daily debt since 1993 or fiscal-year-end debt since 1790 — 235 years in one call.

TOOLget_us_interest_rates

Average interest rates the Treasury pays, by security class (bills, notes, bonds…), 2001+.

Famous average prices

1 tool

TOOLget_famous_prices

Eggs, gasoline, milk, bread, ground beef, coffee, electricity — latest basket or per-item history since 1976.

Key & quota

1 tool

TOOLget_my_usage

Plan, requests used and remaining quota of the configured key.

Under the hood

Why agents love it

Official numbers, never invented

BLS & Treasury

Everything comes from the BLS and the U.S. Treasury through the same gateway as the raw APIs. Months the government never published are served as null — your agent won't hallucinate them.

Built for tool use

Validated inputs

snake_case tools with validated inputs, compact JSON outputs and error messages an LLM can act on: invalid key, rate limit with retry timing, quota with an upgrade path.

One key, honest limits

Same quota

The MCP server uses your normal Synergic APIs key and counts against the same quota. get_my_usage tells the agent exactly what's left.

Works everywhere MCP does

Node 18.17+

Claude Desktop, Claude Code, Cursor, and any other MCP-compatible client. Stdio transport, Node 18.17+, nothing else to install.

Free tier

Get started

Get a free API key 500 req/mo · No credit card required · works with the MCP server out of the box