A guide for collecting property listings from Redfin, a real-estate search website. It uses Redfin's CSV download endpoint to retrieve structured listing data.

Use it to download regional listings with details such as price, bedrooms, bathrooms, size, location, MLS number, and property URL.

It avoids the 403 block on ordinary property-page requests and does not require a browser or login.

redfin — Skill for Claude Code and Codex by AgentComputerAI/torch

Install

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.

Any agent

npx skills add AgentComputerAI/torch --skill redfin

Clone the repo

git clone --depth 1 https://github.com/AgentComputerAI/torch

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/agentcomputerai/torch/redfin/github.svg)](https://agentmods.dev/skills/agentcomputerai/torch/redfin)

Your own site

<a href="https://agentmods.dev/skills/agentcomputerai/torch/redfin"><img src="https://agentmods.dev/badge/skills/agentcomputerai/torch/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/agentcomputerai/torch/redfin"><img src="https://agentmods.dev/badge/skills/agentcomputerai/torch/redfin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,097 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00095	$0.02097
Opus 5.5	$0.00038	$0.00839
Sonnet 5.5	$0.00019	$0.00419
Haiku 4.5	$0.00010	$0.00210

Measured 1mo ago against content hash b4f06357eb14, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

redfin scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

description: Proven scraping playbook for redfin.com listings. The HTML pages are CloudFront-blocked (403) on bare curl, but Redfin exposes a public undocumented endpoint at /stingray/api/gis-csv that returns the entire

skills/sites/redfin/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Redfin (redfin.com)

Redfin's HTML pages sit behind CloudFront and return 403 ERROR — Request blocked to plain curl, but their internal "Download All" CSV endpoint (/stingray/api/gis-csv) is wide open. One GET returns up to 350 listings with 27 columns of structured data — price, beds, baths, sqft, lat/lon, MLS#, URL, year built, HOA, etc. No browser, no captcha, no proxy.

Detection

Signal	Value
CDN	CloudFront (`x-amz-cf-id`, `via: 1.1 ...cloudfront.net`)
HTML on bare curl	HTTP 403 "Request blocked"
API on bare curl	HTTP 200 CSV
Auth	None
Anti-bot on API	None observed
robots.txt	Disallows crawling listing pages, but `/stingray/api/gis-csv` is the same endpoint the site's "Download All" button hits

Architecture

The page at https://www.redfin.com/city/<region_id>/<STATE>/<City-Name> is a React SPA. The "Download All" button on the search results page issues a single request to:

GET https://www.redfin.com/stingray/api/gis-csv
  ?al=1
  &market=<market_slug>
  &num_homes=350
  &ord=redfin-recommended-asc
  &page_number=1
  &region_id=<region_id>
  &region_type=6        # 6 = city. Other types: 2 = zip, 5 = county, 1 = neighborhood
  &sf=1,2,3,5,6,7
  &status=9             # 9 = active for sale
  &uipt=1,2,3,4,5,6,7,8 # property types
  &v=8

The response is a CSV file (Content-Type: text/csv) with 27 columns. Cap is 350 listings per call — num_homes=1000 returns {"errorMessage":"Invalid num_homes argument value","resultCode":101}. The endpoint does not honor page_number > 1 for additional pages on the same query (it returns the same first 350). To get more than 350, narrow the query (by zip, neighborhood, price band, or property type).

The region_id comes straight from the canonical URL. For https://www.redfin.com/city/17151/CA/San-Francisco, region_id = 17151, region_type = 6.

Strategy used

Phase 0 — curl: HTML → 403 CloudFront. Tried /stingray/api/gis-csv → 200 CSV. Done.
Phase 1: skipped.
Phase 2: skipped (no browser needed).
Phase 3: parse CSV, normalize columns, save JSON.

Read the full file on GitHub · 158 lines

Changes

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.

1mo ago First seen · 158 lines · 95 tokens per session scan A b4f06357eb14

Subscribe to this mod's changes

redfin is a skill published in the GitHub repository AgentComputerAI/torch (5 stars, last pushed 6mo ago), licensed MIT. It adds 95 tokens to every session and 2,097 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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