io.github.theluckystrike/i-bond-rate-mcp

up checked 2026-11-11T00:37:52.628Z

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Publisher-provided title

I Bond Rate MCP

Publisher-provided description

Current I bond rate, what your I bond earns by issue month, and value estimates from TreasuryDirect.

Summary by lookupd

Look up current and historical I bond rates and estimate bond values and composite earnings from TreasuryDirect data.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http i-bond-rate https://i-bond-rate-mcp.lipmichal.workers.dev/mcp

Codex, remote (streamable-http)

codex mcp add i-bond-rate --url https://i-bond-rate-mcp.lipmichal.workers.dev/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "i-bond-rate": {
      "url": "https://i-bond-rate-mcp.lipmichal.workers.dev/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (5 tools)

Publisher-provided text

• get_current_i_bond_rate Current Series I savings bond composite rate, fixed rate and semiannual inflation rate for new purchases, read at call time from the TreasuryDirect "I bonds int
• get_i_bond_rate_for_issue_date For an I bond bought in a given month: its fixed rate, the composite rate it earns in the current (or given) 6-month period, the months its rate changes, whethe
• estimate_i_bond_value Estimate what I bonds are worth for an issue month and purchase amount at the start of a month: value with all interest and the redemption value after the 3-mon
• calculate_i_bond_composite_rate Apply the Treasury formula fixed + 2 x semiannual inflation + fixed x semiannual inflation, rounded to 0.01 percent with a floor of zero. Use it for rate predic
• get_i_bond_rate_history Fixed rate for new bonds, semiannual inflation rate and composite rate for every May and November announcement since September 1998, newest first, from the Trea

Details

• Version: 1.0.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 719 ms
• First indexed: 2026-11-05T14:17:40.300Z
• Last seen in registry: 2026-11-05T14:17:40.300Z
• Repository: https://github.com/theluckystrike/i-bond-rate-mcp

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