Mortgage Rates Today MCP
io.github.theluckystrike/mortgage-rates-today-mcptheluckystrikestreamable-httpv1.0.0Scanned
Mortgage rates today: Freddie Mac weekly 30 and 15 year fixed averages, history and payment math.
4 tools: 1 do something that can't be undone and 3 only read.
- Reads private data · 0
- Reads text others write · 4
- Can send data out · 0
- 1 finding
Anlyon alternative
1 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
4 tools
Can't be undone 1Claude Code: ask
calculate_mortgage_paymentMonthly principal and interest and total interest for a fixed-rate loan.Reads text others write1 finding
Why it is in this group
- The name "calculate_mortgage_payment" says "payment": a word that usually means money moves, which cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
The server marks "calculate_mortgage_payment" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "calculate_mortgage_payment" says "payment": a word that usually means money moves, which cannot be taken back.
Description, as the server wrote it Monthly principal and interest and total interest for a fixed-rate loan. Without a rate it uses this week's Freddie Mac average for 30-year or 15-year terms, and compares it with the average a year earlier. Taxes, insurance and PMI are not included.
Annotations the server declares
- title: Mortgage payment
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
Only reads 3Show 3 read-only tools
get_mortgage_rate_historyFreddie Mac PMMS 30-year or 15-year fixed averages between two dates as weekly rows or monthly or annual averages, with the high, low and change over the range.Reads text others writeNo findings
Why it is in this group
- The name "get_mortgage_rate_history" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Freddie Mac PMMS 30-year or 15-year fixed averages between two dates as weekly rows or monthly or annual averages, with the high, low and change over the range. Default is the last 52 weeks of the 30-year rate.
Annotations the server declares
- title: Mortgage rate history
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_mortgage_rate_on_dateThe Freddie Mac PMMS weekly average 30-year and 15-year fixed rates (plus 5/1 ARM and points where published) in force on a date, from 1971-04-02 to today.Reads text others writeNo findings
Why it is in this group
- The name "get_mortgage_rate_on_date" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it The Freddie Mac PMMS weekly average 30-year and 15-year fixed rates (plus 5/1 ARM and points where published) in force on a date, from 1971-04-02 to today.
Annotations the server declares
- title: Mortgage rate on a date
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
get_mortgage_rates_todayLatest Freddie Mac PMMS weekly average 30-year and 15-year fixed mortgage rates, read at call time from freddiemac.com: rate, week-over-week change, rate a year ago, 52-week high, …Reads text others writeNo findings
Why it is in this group
- The name "get_mortgage_rates_today" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Latest Freddie Mac PMMS weekly average 30-year and 15-year fixed mortgage rates, read at call time from freddiemac.com: rate, week-over-week change, rate a year ago, 52-week high, low and average, the week date and the next expected release. National averages for well-qualified conventional purchase borrowers.
Annotations the server declares
- title: Mortgage rates today
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write4
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
The server marks "calculate_mortgage_payment" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "calculate_mortgage_payment" says "payment": a word that usually means money moves, which cannot be taken back.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http mortgage-rates-today https://mortgage-rates-today-mcp.lipmichal.workers.dev/mcpclaude mcp add --transport http mortgage-rates-today https://mortgage-rates-today-mcp.lipmichal.workers.dev/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__mortgage-rates-today__get_mortgage_rates_today",
"mcp__mortgage-rates-today__get_mortgage_rate_on_date",
"mcp__mortgage-rates-today__get_mortgage_rate_history"
],
"ask": [
"mcp__mortgage-rates-today__calculate_mortgage_payment"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as mortgage-rates-today. Review it before you use it.
Capability tags behind 4 rules
- mcp__mortgage-rates-today__get_mortgage_rates_today untrusted-input
- mcp__mortgage-rates-today__get_mortgage_rate_on_date untrusted-input
- mcp__mortgage-rates-today__get_mortgage_rate_history untrusted-input
- mcp__mortgage-rates-today__calculate_mortgage_payment untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/io.github.theluckystrike/mortgage-rates-today-mcp/verify?hash=05ff75e7bec2a0b3d1323d706d1d77c9b0c50779ed5178131bf36ef0b4ae07ff" | jq -e '.changed == false'Pinned hash 05ff75e7bec2, from Nov 5, 2026, 14:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.github.theluckystrike/mortgage-rates-today-mcp/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.theluckystrike/mortgage-rates-today-mcp)Source: MCP Registry · repository. Synced Nov 5, 2026, 14:18 UTC.