Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add chrischall/redfin-mcp --skill redfingit clone --depth 1 https://github.com/chrischall/redfin-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/chrischall/redfin-mcp/redfin)<a href="https://agentmods.dev/skills/chrischall/redfin-mcp/redfin"><img src="https://agentmods.dev/badge/skills/chrischall/redfin-mcp/redfin/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/chrischall/redfin-mcp/redfin"><img src="https://agentmods.dev/badge/skills/chrischall/redfin-mcp/redfin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00115 | $0.02048 |
| Opus 5 | $0.00057 | $0.01024 |
| Sonnet 5 | $0.00023 | $0.00410 |
| Haiku 4.5 | $0.00012 | $0.00205 |
Grade A, and why
redfin scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
redfin-mcp
MCP server for Redfin — natural-language access to listings, property records, market reports, and your saved homes/searches. Routes through your signed-in redfin.com tab via the fetchproxy browser extension, so AWS WAF / DataDome see a real browser session instead of a Node process.
⚠️ Redfin does not publish a public consumer API. This server uses the same private
/stingray/...endpoints the redfin.com web app calls, dispatched through your own signed-in browser tab via the fetchproxy extension. Use at your own discretion.
Setup
1. Install redfin-mcp
.mcp.json (project) or ~/.claude/mcp.json (global):
{
"mcpServers": {
"redfin": {
"command": "npx",
"args": ["-y", "redfin-mcp"]
}
}
}
2. Install the fetchproxy extension (one-time, shared across all fetchproxy-based MCPs)
git clone https://github.com/chrischall/fetchproxy
cd fetchproxy
npm ci
npm --workspace=@fetchproxy/extension-chrome run build
Then in Chrome: chrome://extensions → Developer mode → Load unpacked → pick packages/extension-chrome/dist/.
3. Open redfin.com and sign in.
That's it. No API keys, no env vars.
Tools
Public data
redfin_search_properties— Search by location + filters (price, beds/baths min, home type). Resolves the location via Redfin's autocomplete then queries the/stingray/api/gisendpoint. Returns matching listings with price, beds/baths, sqft, year built, address, and the Redfin home URL.redfin_get_property(view?)— Full property record byurl(Redfin homedetails URL or path),property_idalone (resolved internally by following Redfin's/home/<id>redirect to the canonical slug, theninitialInfo), orproperty_id+listing_id(fastest — skips resolution). Two-round-trip API:initialInforesolves the URL to IDs, thenaboveTheFoldfetches the data. Returns address, beds/baths, sqft, year built, price, status, days on market, primary photo.redfin_get_market_report— Median sale/list prices, price per sqft, days on market, year-over-year change, homes sold/on market for a Redfin region. Provide eitherlocation(free-text) orregion_id+region_type. All metrics returned as formatted strings (e.g."$870K","+2.4%").redfin_calculate_mortgage— Local PITI calculator. No network call. Provide home price, interest rate, optional down payment / taxes / insurance / HOA / PMI; returns a full monthly breakdown.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago Changed · +57 lines 1093460e2f8e
- 10d ago First seen · 77 lines · 115 tokens per session scan A 0bc211274c9f
redfin is a skill published in the GitHub repository chrischall/redfin-mcp (3 stars, last pushed today), licensed MIT. It adds 115 tokens to every session and 2,048 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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