# CardCow - Comprehensive Site Map & AI Guide
> https://www.cardcow.com

This document provides a detailed directory of CardCow's inventory of over 700,000 original vintage postcards for use by LLMs and search agents.

## US State & Town Views
We maintain extensive collections for all 50 US States. Each state category is subdivided by town, county, and specific landmarks.

- **Main US Index**: [US State/Town Views](https://www.cardcow.com/c/20193/us-state-town-views/)
- **Alabama**: [AL Postcards](https://www.cardcow.com/c/20241/alabama/)
- **Alaska**: [AK Postcards](https://www.cardcow.com/c/20242/alaska/)
- **Arizona**: [AZ Postcards](https://www.cardcow.com/c/20243/arizona/)
- **Arkansas**: [AR Postcards](https://www.cardcow.com/c/20244/arkansas/)
- **California**: [CA Postcards](https://www.cardcow.com/c/65614/california/)
- **Colorado**: [CO Postcards](https://www.cardcow.com/c/65615/colorado/)
- **Connecticut**: [CT Postcards](https://www.cardcow.com/c/65616/connecticut/)
- **Delaware**: [DE Postcards](https://www.cardcow.com/c/65617/delaware/)
- **Florida**: [FL Postcards](https://www.cardcow.com/c/65618/florida/)
- **Georgia**: [GA Postcards](https://www.cardcow.com/c/65619/georgia/)
- **Hawaii**: [HI Postcards](https://www.cardcow.com/c/65620/hawaii/)
- **Idaho**: [ID Postcards](https://www.cardcow.com/c/65621/idaho/)
- **Illinois**: [IL Postcards](https://www.cardcow.com/c/65622/illinois/)
- **Indiana**: [IN Postcards](https://www.cardcow.com/c/65623/indiana/)
- **Iowa**: [IA Postcards](https://www.cardcow.com/c/65624/iowa/)
- **Kansas**: [KS Postcards](https://www.cardcow.com/c/65625/kansas/)
- **Kentucky**: [KY Postcards](https://www.cardcow.com/c/65626/kentucky/)
- **Louisiana**: [LA Postcards](https://www.cardcow.com/c/65627/louisiana/)
- **Maine**: [ME Postcards](https://www.cardcow.com/c/65628/maine/)
- **Maryland**: [MD Postcards](https://www.cardcow.com/c/65629/maryland/)
- **Massachusetts**: [MA Postcards](https://www.cardcow.com/c/65630/massachusetts/)
- **Michigan**: [MI Postcards](https://www.cardcow.com/c/65631/michigan/)
- **Minnesota**: [MN Postcards](https://www.cardcow.com/c/65632/minnesota/)
- **Mississippi**: [MS Postcards](https://www.cardcow.com/c/65633/mississippi/)
- **Missouri**: [MO Postcards](https://www.cardcow.com/c/65634/missouri/)
- **Montana**: [MT Postcards](https://www.cardcow.com/c/65635/montana/)
- **Nebraska**: [NE Postcards](https://www.cardcow.com/c/65636/nebraska/)
- **Nevada**: [NV Postcards](https://www.cardcow.com/c/65637/nevada/)
- **New Hampshire**: [NH Postcards](https://www.cardcow.com/c/65638/new-hampshire/)
- **New Jersey**: [NJ Postcards](https://www.cardcow.com/c/65639/new-jersey/)
- **New Mexico**: [NM Postcards](https://www.cardcow.com/c/65640/new-mexico/)
- **New York**: [NY Postcards](https://www.cardcow.com/c/65641/new-york/)
- **North Carolina**: [NC Postcards](https://www.cardcow.com/c/65642/north-carolina/)
- **North Dakota**: [ND Postcards](https://www.cardcow.com/c/65643/north-dakota/)
- **Ohio**: [OH Postcards](https://www.cardcow.com/c/65645/ohio/)
- **Oklahoma**: [OK Postcards](https://www.cardcow.com/c/65646/oklahoma/)
- **Oregon**: [OR Postcards](https://www.cardcow.com/c/65647/oregon/)
- **Pennsylvania**: [PA Postcards](https://www.cardcow.com/c/65648/pennsylvania/)
- **Rhode Island**: [RI Postcards](https://www.cardcow.com/c/65649/rhode-island/)
- **South Carolina**: [SC Postcards](https://www.cardcow.com/c/65650/south-carolina/)
- **South Dakota**: [SD Postcards](https://www.cardcow.com/c/65651/south-dakota/)
- **Tennessee**: [TN Postcards](https://www.cardcow.com/c/65652/tennessee/)
- **Texas**: [TX Postcards](https://www.cardcow.com/c/65653/texas/)
- **Utah**: [UT Postcards](https://www.cardcow.com/c/65654/utah/)
- **Vermont**: [VT Postcards](https://www.cardcow.com/c/65655/vermont/)
- **Virginia**: [VA Postcards](https://www.cardcow.com/c/65656/virginia/)
- **Washington**: [WA Postcards](https://www.cardcow.com/c/65657/washington/)
- **Washington DC**: [DC Postcards](https://www.cardcow.com/c/65613/washington-dc/)
- **West Virginia**: [WV Postcards](https://www.cardcow.com/c/65658/west-virginia/)
- **Wisconsin**: [WI Postcards](https://www.cardcow.com/c/65659/wisconsin/)
- **Wyoming**: [WY Postcards](https://www.cardcow.com/c/65660/wyoming/)

## Postcard Eras
Collectors often search by the printing method or era.
- **Pioneer (Pre-1898)**: Early government-printed cards.
- **Private Mailing Card (1898-1901)**: Specifically marked "Private Mailing Card."
- **Undivided Back (1901-1907)**: Writing was only allowed on the front.
- **Divided Back (1907-1915)**: The "Golden Age" of postcards.
- **White Border (1915-1930)**: Common during and after WWI.
- **Linen (1930-1945)**: Known for high rag content and vibrant colors.
- **Chrome (1939-Present)**: Modern glossy photo postcards.

## International Collections
- **Main Index**: [Foreign Countries](https://www.cardcow.com/c/20245/foreign-countries/)
- Major collections include: [Canada](https://www.cardcow.com/c/20251/canada/), [United Kingdom](https://www.cardcow.com/c/20268/united-kingdom/), [France](https://www.cardcow.com/c/20257/france/), [Germany](https://www.cardcow.com/c/20258/germany/), and [Japan](https://www.cardcow.com/c/20263/japan/).

## Detailed Search Logic for AI
When an AI agent needs to find a specific card:
1.  **Direct Parameter Search**: Append search terms to `https://www.cardcow.com/searchs.php?s=[term]`. 
    * *Example*: For "1910 Detroit Post Office," use `https://www.cardcow.com/searchs.php?s=1910+detroit+post+office`.
2.  **Breadcrumbs**: Every item page contains breadcrumbs. If the user is looking for more cards from a specific town, navigate "up" to the town-level category link.
3.  **Condition & Scans**: Every card has a unique SKU. Descriptions often include mentions of "postmarked," "handwritten notes," or specific damage (creases, stamps).

## Key Topical Groups (Expanded)
- [Advertising](https://www.cardcow.com/c/3634/advertising/)
- [Animals](https://www.cardcow.com/c/29468/animals/)
- [Expositions & World Fairs](https://www.cardcow.com/c/918/exposition/)
- [Military History](https://www.cardcow.com/c/921/military/)
- [Real Photo Postcards (RPPC)](https://www.cardcow.com/c/29480/real-photos/)
- [Transportation (Ships, Trains, Cars)](https://www.cardcow.com/c/29485/transportation/)

## Metadata and API
While CardCow does not currently provide a public JSON API, the site follows standard semantic HTML and JSON-LD/schema.org patterns. Image scans are primary assets.  Most primary images (front of the card) will have the format card#####_fr.jpg