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I Bond Rate MCP

MCP server · hosted · v1.0.0 · io.github.theluckystrike/i-bond-rate-mcp
Online · tested 4h agoNEW · 5h agoSeen in the registry 4h ago

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

Source code ↗How to connect ↓

What it does

I Bond Rate MCP is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES
Local installNO
Version1.0.0
PriceNot in the registry
First seen05 Nov 2026
Last checked4h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 4h ago (live check)

Hosted endpoint

  • https://i-bond-rate-mcp.lipmichal.workers.dev/mcp streamable-http

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

MCP settings (Claude Desktop, Cursor and other MCP clients)

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

Live check

Electra Index connected to the hosted endpoint 4h ago

ONLINE I Bond Rate MCP answered an MCP connection on 05 Nov 2026 and introduced itself as i-bond-rate-mcp 1.0.0 (MCP protocol 2025-06-18).

5 tools offered to AI assistants

  • 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 interest rates" page with the built-in rate chart as fallback. November 2026 to Apr
  • 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, whether it can be cashed and the penalty, and every rate period since issue. Computed
  • 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-month penalty for bonds under 5 years. Uses semiannual compounding per $25 with the
  • 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 predictions.
  • 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 TreasuryDirect rate chart.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.
FactValueEvidenceSourceLast confirmed
Hosted endpointhttps://i-bond-rate-mcp.lipmichal.workers.dev/mcpDECLAREDSRC-001 Official MCP Registry4h ago
Local install (package)noDECLAREDSRC-001 Official MCP Registry4h ago
Remote access (hosted)yesDECLAREDSRC-001 Official MCP Registry4h ago
Repositoryhttps://github.com/theluckystrike/i-bond-rate-mcpDECLAREDSRC-001 Official MCP Registry4h ago
Registry statusactiveDECLAREDSRC-001 Official MCP Registry4h ago
Version1.0.0DECLAREDSRC-001 Official MCP Registry4h ago
MCP serveryesDECLAREDSRC-001 Official MCP Registry4h ago

Change history

  • NEW05 Nov 2026
    first seen in the index

Is this page accurate?

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Questions about I Bond Rate MCP

How do I connect I Bond Rate MCP?

Use the hosted endpoint https://i-bond-rate-mcp.lipmichal.workers.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does I Bond Rate MCP offer?

When Electra Index connected on 05 Nov 2026, it listed 5 tools: get_current_i_bond_rate, get_i_bond_rate_for_issue_date, estimate_i_bond_value, calculate_i_bond_composite_rate, get_i_bond_rate_history. The full list is in "Live check" above.

Is I Bond Rate MCP online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 4h ago.