# Data Vault

> Sample-first data catalog by Matchbook Labs. Free CSV/JSON samples for every dataset, machine-readable index for agents, full packs sold via Getly.

Base URL: https://jayjex.github.io/data-vault
Catalog (start here): https://jayjex.github.io/data-vault/catalog.json
Agent docs: https://jayjex.github.io/data-vault/agents/
MCP server: npx --allow-git=all -y github:jayjex/dataset-mcp (v1.1.0; tools: list_datasets, get_dataset_info, get_sample, query_dataset, get_stats; --allow-git=all needed on npm 12+, plain form on npm 10/11)
MCP repo: https://github.com/jayjex/dataset-mcp
MCP registry name: io.github.jayjex/dataset-mcp
Free printables index (223 free printable pages from the Matchbook Labs funnel, one link per live page): https://jayjex.github.io/data-vault/free-printables-index.html
Free printables by use case (same 223 pages regrouped into budget, moving, study and worksheet use cases): https://jayjex.github.io/data-vault/printable-index-roundup.html
MCP full query: query_dataset(slug, {where, columns, limit, offset}) filters and paginates the FULL released files, 100 rows/call. Example: query_dataset("hud-fmr-2026", {where: [{column: "state", op: "=", value: "TX"}], limit: 5}) returns 3,247 matched Texas rent rows. Full data release: https://github.com/jayjex/dataset-mcp/releases/tag/data-v1
FMR calculator guide (the math behind FMRs + MCP lookup, no official HUD calculator exists): https://jayjex.github.io/data-vault/guides/hud-fair-market-rent-calculator.html
HUD payment standard guide (the 90%-110% PHA band around the FMR, FY2026 band table for six ZIPs): https://jayjex.github.io/data-vault/guides/hud-payment-standard.html
Rent affordability guide (the 30% rule vs the FMR, five metros against the US median household income, FY2026): https://jayjex.github.io/data-vault/guides/rent-affordability-calculator.html
What is llms.txt (plain-English definition of the format, how agents read the file, honest status): https://jayjex.github.io/data-vault/guides/what-is-llms-txt.html
Dataset DOIs: the NFL, HUD FMR, and Airbnb packs have permanent citable DOIs on Zenodo: https://doi.org/10.5281/zenodo.22643177 , https://doi.org/10.5281/zenodo.22643149 , https://doi.org/10.5281/zenodo.22643189

## Datasets

### NFL Games & Betting Lines 1999-2026 (nfl-games)
7,548 NFL games with scores, closing spreads, totals, moneylines, odds, rest days, QBs, coaches, and stadium weather. Niche: sports. Stats: {"rows": 7548, "tables": 3, "columns": 46, "updated": "2026-09-06"}.
- Sample JSON: https://jayjex.github.io/data-vault/data/nfl-games/sample.json
- Sample CSV: https://jayjex.github.io/data-vault/data/nfl-games/sample.csv
- Page: https://jayjex.github.io/data-vault/datasets/nfl-games.html
- Full data: [Get full data](https://www.getly.store/product/nfl-betting-game-data-pack-1999-2026-7-548-games-spreads-totals-moneylines-mtpl017h)

### HUD Fair Market Rents FY2026 (hud-fmr-2026)
FY2026 fair market rents for 51,895 ZIP codes, 3,229 counties, and 52 states. Five bedroom sizes per row. Niche: gov-data. Stats: {"rows": 51895, "tables": 3, "columns": 11, "updated": "FY2026"}.
- Sample JSON: https://jayjex.github.io/data-vault/data/hud-fmr-2026/sample.json
- Sample CSV: https://jayjex.github.io/data-vault/data/hud-fmr-2026/sample.csv
- Page: https://jayjex.github.io/data-vault/datasets/hud-fmr-2026.html
- Texas guide: https://jayjex.github.io/data-vault/guides/hud-fmr-texas.html (state=TX filter, 3,247 ZIP rows, metro table, free state-summary.csv)
- County guide: https://jayjex.github.io/data-vault/guides/hud-fmr-by-county.html (3,229 county rows, Harris County TX query example, median/max rollup explainer)
- Full data: [Get full data](https://www.getly.store/product/usa-rent-benchmark-fy2026-fair-market-rent-by-zip-code-county-mtqsf1xm)

### Airbnb Listings, 6 US Cities (airbnb-six-cities)
90,169 Airbnb listings across Austin, Nashville, Denver, New York City, Las Vegas, and San Diego in one normalized schema. Niche: real-estate. Stats: {"rows": 90169, "tables": 8, "columns": 12, "updated": "2026-08-10"}.
- Sample JSON: https://jayjex.github.io/data-vault/data/airbnb-six-cities/sample.json
- Sample CSV: https://jayjex.github.io/data-vault/data/airbnb-six-cities/sample.csv
- Page: https://jayjex.github.io/data-vault/datasets/airbnb-six-cities.html
- Guide (per-city view): https://jayjex.github.io/data-vault/guides/airbnb-data-by-city.html
- Full data: [Get full data](https://www.getly.store/product/airbnb-multi-city-investor-pack-6-cities-60k-listings-90-169-rows-2026-snapshots-mtpkvxdf)

### Superteam Earn Live Listings (earn-bounties)
28 open Superteam Earn listings with full description HTML, the raw cards dump, and 186+ reverse-engineered API routes. Niche: ai-agents. Stats: {"rows": 28, "tables": 3, "columns": 15, "updated": "2026-09-04"}.
- Sample JSON: https://jayjex.github.io/data-vault/data/earn-bounties/sample.json
- Sample CSV: https://jayjex.github.io/data-vault/data/earn-bounties/sample.csv
- Page: https://jayjex.github.io/data-vault/datasets/earn-bounties.html
- Full data: [Get full data](https://www.getly.store/product/superteam-earn-28-live-listings-dataset-186-reverse-engineered-api-routes-mtmy11ny)

### Web Scraping Script Pack (scraper-pack)
Ten self-contained Playwright scripts for pagination, infinite scroll, login sessions, price monitors, sitemap crawling, and retries. Niche: dev-tools. Stats: {"rows": 10, "tables": 1, "columns": 0, "updated": "2026-09-07", "unit": "scripts"}.
- Sample JSON: https://jayjex.github.io/data-vault/data/scraper-pack/sample.json
- Sample CSV: https://jayjex.github.io/data-vault/data/scraper-pack/sample.csv
- Page: https://jayjex.github.io/data-vault/datasets/scraper-pack.html
- Full data: [Get full data](https://www.getly.store/product/web-scraping-script-pack-10-production-ready-playwright-templates-mtn8em7k)

### Printable Engineering Bundle (printable-engineering-bundle)
Aggregated bundle of two existing packs: 120 printable kindergarten worksheets (A4 + US Letter PDFs with answer keys, mazes, dot-to-dots) and 5 Web3 KPI spreadsheet templates (portfolio, airdrop, DeFi yield, bounty income, trading journal) with live formulas. Niche: printables. Stats: {"worksheets_pages": 120, "spreadsheets": 5, "paper_sizes": 2, "updated": "2026-09-06"}.
- Page: https://jayjex.github.io/data-vault/datasets/printable-engineering-bundle.html
- Free printables index: https://jayjex.github.io/data-vault/free-printables-index.html
- Full bundle: [Get the bundle](https://www.getly.store/store/matchbook-labs-mtmw06l2)

## Guides

- [NFL Games Dataset CSV: 7,548 Games with Betting Lines (1999-2026)](https://jayjex.github.io/data-vault/guides/nfl-games-data-guide.html): column guide for the games table, betting-line glossary
- [NFL Stadium Weather: How Roof and Weather Show Up in Game Data](https://jayjex.github.io/data-vault/guides/nfl-stadium-weather.html): roof/temp/wind columns, dome vs outdoor scoring on the 22-row sample, hottest kickoffs
- [NFL Data by Conference: AFC vs NFC From Real Game Rows](https://jayjex.github.io/data-vault/guides/nfl-data-by-conference.html): 1999 AFC/NFC map, 7 inter-conference games, points and win counts, pandas script
- [NFL Spread History CSV: ATS Cover Data for Every Game Since 1999](https://jayjex.github.io/data-vault/guides/nfl-spreads-history.html): spread_line sign convention, cover ATS arithmetic, 27-season cover table from season-summaries.csv
- [Free Sports Data CSV: Verified Sources, Licenses, and a 7,548-Game NFL Dataset](https://jayjex.github.io/data-vault/guides/free-sports-data-csv.html): licensed sources for sports CSVs
- [NFL Data in Excel or Google Sheets: Import the CSV, Step by Step](https://jayjex.github.io/data-vault/guides/nfl-dataset-excel.html): spreadsheet import walkthrough
- [NFL Data in Python: Load the Games CSV with pandas](https://jayjex.github.io/data-vault/guides/nfl-dataset-python.html): pandas quickstart on the 22-row sample
- [NFL Data API in Python: requests Examples with Live Endpoints](https://jayjex.github.io/data-vault/guides/nfl-data-api-python.html): live ESPN + nflverse endpoint examples
- [ESPN API in Python: requests Examples for the Free Site Endpoints](https://jayjex.github.io/data-vault/guides/espn-api-python.html): undocumented ESPN endpoints, scoreboard and teams
- [Free NFL Historical Data: nflverse Raw vs a Preprocessed CSV Pack](https://jayjex.github.io/data-vault/guides/nfl-data-alternative.html): raw releases vs preprocessed trade-offs
- [Open Data API: Free Sample Endpoints and an MCP Query Layer](https://jayjex.github.io/data-vault/guides/open-data-api-alternative.html): no-key endpoints plus query_dataset
- [HUD Fair Market Rent Data by ZIP Code, Explained (FY2026 CSV)](https://jayjex.github.io/data-vault/guides/hud-rent-data-explained.html): schema walkthrough of the HUD pack
- [HUD FMR by ZIP Code: Fair Market Rent by ZIP, FY2026](https://jayjex.github.io/data-vault/guides/hud-fmr-by-zip.html): single-ZIP lookup methods
- [HUD FMR by County: Fair Market Rent by County, FY2026](https://jayjex.github.io/data-vault/guides/hud-fmr-by-county.html): 3,229 county rows, rollup explainer
- [HUD Metro Area List: Every FY2026 Metro FMR Area](https://jayjex.github.io/data-vault/guides/hud-metro-list.html): metro area names and codes
- [Fair Market Rent Calculator: How FMR Math Works, FY2026 Examples](https://jayjex.github.io/data-vault/guides/hud-fair-market-rent-calculator.html): the math behind FMRs + MCP lookup
- [HUD Payment Standard: The 90%-110% Band Around the FMR, FY2026](https://jayjex.github.io/data-vault/guides/hud-payment-standard.html): PHA payment standard vs FMR, six-ZIP band table
- [HUD Fair Market Rent Lookup: FMR by ZIP Code, One at a Time or in Bulk](https://jayjex.github.io/data-vault/guides/fmr-lookup-alternatives.html): manual vs bulk lookup compared
- [FMR vs Actual Rent: What Each Number Measures and Why They Differ](https://jayjex.github.io/data-vault/guides/fmr-vs-rent-actuals.html): benchmark vs market rent
- [HUD FMR vs Census Rent: FMR vs ACS Median Gross Rent](https://jayjex.github.io/data-vault/guides/hud-fmr-vs-census-rent.html): 40th vs 50th percentile, five-state table
- [SAFMR vs FMR: Small Area Fair Market Rent vs Metro FMR](https://jayjex.github.io/data-vault/guides/safmr-vs-fmr.html): ZIP-level vs metro-level rents
- [HUD FMR Texas: Fair Market Rent Data for Texas, FY2026](https://jayjex.github.io/data-vault/guides/hud-fmr-texas.html): state=TX filter, 3,247 ZIP rows, metro split
- [Airbnb Data Download: 6-City Listings CSV (90,169 Rows)](https://jayjex.github.io/data-vault/guides/airbnb-data-guide.html): schema and cities in the Airbnb pack
- [Airbnb Price Data: Mean and Median Nightly Price in 6 US Cities](https://jayjex.github.io/data-vault/guides/airbnb-price-data.html): per-city means and medians, snapshot vs live
- [Airbnb Data by City: 6 US Markets, Rows and Median Prices](https://jayjex.github.io/data-vault/guides/airbnb-data-by-city.html): per-city row counts and medians
- [Airbnb Occupancy Data: What a Listings Snapshot Can and Cannot Tell You](https://jayjex.github.io/data-vault/guides/airbnb-occupancy-data.html): availability fields, proxies, and honest limits
- [Airbnb Dataset Sample: Free CSV Data Download (20 Rows, 12 Columns)](https://jayjex.github.io/data-vault/guides/airbnb-data-sample.html): free sample rows
- [Airbnb Rental Analysis: Screen 6 US Markets With One Dataset](https://jayjex.github.io/data-vault/guides/airbnb-investment-analysis.html): screening workflow with real queries
- [Inside Airbnb Alternative: 6 Cities, One Schema, 90,169 Rows](https://jayjex.github.io/data-vault/guides/inside-airbnb-alternative.html): normalized schema vs per-city dumps
- [Superteam Earn Data: the Solana Bounties Dataset and Its API Map](https://jayjex.github.io/data-vault/guides/solana-bounties-data-guide.html): bounty schema and 186+ API routes
- [Solana Grants List: Mapping the Ecosystem's Funding Programs from Public Data](https://jayjex.github.io/data-vault/guides/solana-grants-data.html): research method, 51-row snapshot splits, 6 AGENT_ALLOWED rows, grants-vs-bounty framing
- [Solana Bounty Tracker Data: Web3 Bounty Listings Without an Official API](https://jayjex.github.io/data-vault/guides/web3-bounty-data.html): harvesting bounty listings
- [Superteam Earn Alternative: Solana Bounty Tracker vs Dataset Approach](https://jayjex.github.io/data-vault/guides/bounty-tracker-alternative.html): dashboards vs raw rows
- [What Is a Data Dictionary? Structure and Real CSV Examples](https://jayjex.github.io/data-vault/guides/data-dictionary-explained.html): column-code documentation format
- [CSV vs API for Data: Which One You Need, With a Decision Table](https://jayjex.github.io/data-vault/guides/csv-vs-api.html): worked decision example
- [Scrape Without Coding: 10 Editable Template Scripts](https://jayjex.github.io/data-vault/guides/scrape-without-coding.html): edit-one-config workflow
- [Python Scraping Template: 10 Ready-to-Edit Patterns](https://jayjex.github.io/data-vault/guides/scraping-python-templates.html): patterns mapped to Python, self-host angle
- [How to Sell Datasets: Our Public-Data Pipeline, End to End](https://jayjex.github.io/data-vault/guides/how-we-sell-public-data.html): pipeline documentation, license to checkout
- [Public Domain Datasets: Licenses, Commercial Use, Credit Lines](https://jayjex.github.io/data-vault/guides/public-domain-datasets.html): license table for public data
- [MCP Server for Claude Desktop: Install dataset-mcp, Config JSON, Real Outputs](https://jayjex.github.io/data-vault/guides/mcp-claude-desktop.html): Claude Desktop config walkthrough

## Tools

- [Sample Data Downloads: Free CSV and JSON Test Files](https://jayjex.github.io/data-vault/tools/sample-data-downloads.html): every free sample with columns and row counts
- [Web Scraping Tools Comparison: Cloud Platforms vs Self-Hosted Scripts](https://jayjex.github.io/data-vault/tools/scraping-tools-alternative.html): Apify-class platforms vs scripts
- [Web Scraping Scripts Pack: 10 Ready-to-Run Playwright Templates](https://jayjex.github.io/data-vault/tools/scraping-scripts.html): the script pack landing
- [How to Create an llms.txt File (No Generator Needed)](https://jayjex.github.io/data-vault/tools/llms-txt-howto.html): build one by hand, live example
- [Free API Datasets for AI Agents, 5 packs with JSON samples](https://jayjex.github.io/data-vault/free-datasets-for-ai-agents.html): agent-oriented dataset index
- [MCP Server Directory: Official Registry, Community Indexes, 3 Free Servers](https://jayjex.github.io/data-vault/tools/mcp-server-directory.html): registry + PulseMCP/mcp.so/Glama/mcpservers.org, our servers with README configs

## Agents

- [Agent access: catalog.json & sample endpoints](https://jayjex.github.io/data-vault/agents/): start here for machine access
- [MCP server for datasets: query full packs from Claude Desktop or pi](https://jayjex.github.io/data-vault/agents/mcp-dataset-server.html): v1.1.0, five tools
- [llms.txt for AI Agents: Structure and a Live Example](https://jayjex.github.io/data-vault/agents/llms-txt-guide.html): the format, explained
- [Free Tools for AI Agents: catalog, MCP server, sample endpoints](https://jayjex.github.io/data-vault/agents/free-agent-tools.html): full free toolkit
- [MCP Tools for Claude: 3 Free Servers, Config JSON, Registry](https://jayjex.github.io/data-vault/agents/mcp-tools-for-claude.html): server comparison with configs
- [MCP vs API: What the Difference Actually Is, With a Dataset Example](https://jayjex.github.io/data-vault/agents/mcp-vs-api.html): layer difference, curl vs query_dataset on real NFL rows, when each wins, config snippets

## Printables

- [Free Printables Index: 223 printable trackers, planners and worksheets](https://jayjex.github.io/data-vault/free-printables-index.html)
- [Free Printable Packs by Use Case: budget, moving, study and worksheets](https://jayjex.github.io/data-vault/printable-index-roundup.html)
- [Free Printables vs Paid Packs: When Free Is Enough and When a Bundle Wins](https://jayjex.github.io/data-vault/printables/free-printables-vs-paid.html): one-print rule for choosing
- [Free Printable PDF Templates: 223 Tracker Sheets, Planners and Worksheets by Category](https://jayjex.github.io/data-vault/printables/free-printable-templates.html)

## Access rules
- Fetch catalog.json and every sample endpoint freely. No API keys, no auth.
- sample.json returns {slug, name, columns[], row_count, records[]}.
- Samples are CC BY 4.0 (nflverse, Inside Airbnb, HUD per dataset). Credit "Data Vault (jayjex.github.io/data-vault), CC BY 4.0" when republishing.
- Full packs are licensed per purchase through the Getly links above.