API TERMS OF USE AND LICENSE AGREEMENT

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For technical documentation, integration guides, and API endpoints, visit the CDN Public API V2 Usage Guide

1. OVERVIEW

The CDN Public Application Programming Interface (API) provides programmatic access to CDN Publishing, LLC and its affiliates, subsidiaries, and brands' comprehensive pricing data and catalog information for coins and currency. This API allows applications to retrieve real-time pricing information, browse catalog structure, and access detailed collectible data directly from Greysheet databases.

Cost: the cost to use the CDN-Greysheet API is inexpensive and can be reviewed on our API pricing page.

2. DEFINITIONS

API means CDN's application programming interface providing data and services described herein.

CDN means CDN Publishing, LLC and its affiliates, subsidiaries, and brands.

Licensee means the individual or entity accessing or using the API governed by the terms of this Agreement.

Licensed Data means Greysheet Identification (GSID) systems, catalog metadata, and pricing information as further defined in Section 4 of this Agreement, together with all other data made accessible through the applicable API Access Level.

Access Levels means the tier of API functionality and Licensed Data made accessible to Licensee based on Licensee's selected subscription.

Basic Access provides access to basic catalog information and CPG retail pricing only

Advanced Access provided access to complete catalog information, CPG retail pricing, and Greysheet, Bluehseet PCGS, Bluesheet NGC, Greensheet, and Blue Book wholesale pricing

3. LICENSE AND AUTHORIZED USE

3.1. CDN grants Licensee a non-exclusive, non-transferable, non-sublicensable license to access and use the API and Licensed Data solely for the purposes permitted herein.

3.2. Access level is determined by your current Greysheet subscription level and API level requested on a per call basis.

3.3. Licensee may not sell, lease, sublicense, or otherwise transfer access to the API without CDN's prior written consent.

4. LICENSED DATA AND PERMITTED USES

4.1. Greysheet Identification Systems (GSID) Numbers: May be used in back-end and front-end systems. When displayed on public websites, 'GSID' must be shown with a hyperlink to the matching record.

4.2. Greysheet Catalog Metadata: May only be displayed with proper credit to CDN and referenced third parties obtained from CDN in advance, as an extension amendment to this agreement.

4.3 Greysheet Wholesale Pricing Values (Greysheet, Bluesheet, Greensheet): May be used only for back-end internal systems and is not permitted on any public websites without CDN's prior written permission.

4.4. CPG Retail Pricing Values: May be used in front-facing websites or collection management tools provided values are properly labeled as sourced from CDN (e.g., 'CPG Price (or Value)', 'Red Book Price (or Value)', 'Banknote Book', or 'Friedberg'). Displayed values must be hyperlinked to CDN.

4.5. Attribution: In all cases, Licensee must identify CDN (and its brands) as the source of market values and actively promote awareness of CDN data.

5. TERM AND TERMINATION

5.1. This Agreement is effective upon Licensee's first access to the API and remains in force until properly terminated by either party.

5.2. CDN may suspend or revoke API access at its discretion, including for nonpayment, misuse, or failure to attribute CDN data.

5.3. Licensee may terminate API access at any time via written notice to api@whitmanbrands.com.

5.4. Licensee must remove all Licensed Data and references within 30 business days of termination. Failure to comply may result in a penalty of up to $500 per day.

6. ACCESS, FEES, & USAGE

6.1. API usage limits and access to datasets (e.g., Basic, Advanced) depend on your Greysheet subscription level. A dealer level subscription (Coin Dealer Digital or Coin Dealer minimum) is required to access the API.

6.2. Licensee agrees to pay usage fees based on the actual number of API calls and the API level requested per call in a given period, and is billed separately from your regular subscription. For detailed API pricing information, visit greysheet.com. (Note: there is a minimum monthly charge of $25 for any API usage.)

6.3 CDN reserves the right to change pricing, impose custom pricing, or offer volume discounts.

6.4. Licensee may not exceed its usage limits or access data outside its tier without authorization.

6.5. API keys are self managed and available at greysheet.com. For technical implementation details, see the API Usage Guide.

6.6. All API calls must include required authentication headers (e.g. 'x-api-key', 'x-api-token'). Licensee may not share its credentials with unauthorized third parties.

7. RESTRICTIONS ON USE

7.1. Licensee will not directly compete with CDN or its affiliates.

7.2. Licensee will not store data with the intent to avoid future API calls (data hoarding). Internal caching for up to 24 hours is permitted but not past "Refresh Time" or end of business day (3PM Pacific Time).

7.3. Licensee acknowledges that information is provided as is as a general market reference and should not be considered investment advice.

7.4. CDN reserves the right to modify API endpoints, methods, data structures, and business rules. Users will be notified with 30 days advance notice.

7.5. Licensee agrees to reasonable security measures including secure storage of API credentials and encryption of sensitive data.

7.6. Third party systems cannot call the CDN API using Licensees credentials unless specifically permitted in writing (e.g., portfolio managers).

7.7. Except as explicitly permitted herein, Licensee may not reproduce, distribute, or publish CDN data without express prior written consent.

8. REPRESENTATIONS AND WARRANTIES

8.1. DISCLAIMER: API AND DATA ARE PROVIDED "AS IS" WITHOUT WARRANTIES OF ANY KIND. CDN DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

8.2. CDN does not guarantee uninterrupted or error-free access. Data accuracy depends on various factors and CDN is not responsible for discrepancies.

9. LIMITATION OF LIABILITY AND INDEMNIFICATION

9.1. CDN SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THEIR POSSIBILITY.

9.2. CDN's total liability shall not exceed fees paid by Licensee in the six months preceding the claim.

9.3. Licensee indemnifies CDN against all claims arising from Licensee's use of the API or breach of this Agreement.

10. INTELLECTUAL PROPERTY

10.1. CDN retains all intellectual property rights in the API and Licensed Data. This Agreement does not transfer ownership of any CDN property.

10.2. Licensee grants CDN a royalty-free license to use feedback, suggestions, or improvements related to the API.

11. GOVERNING LAW

11.1. This Agreement is governed by Virginia law without regard to conflict of laws provisions.

11.2. Disputes shall be resolved in courts of Fauquier County, Virginia.

12. GENERAL PROVISIONS

12.1. This Agreement constitutes the entire agreement between parties regarding API access.

12.2. No amendment is effective unless in writing and signed by both parties.

12.3. If any provision is unenforceable, remaining provisions continue in effect.

12.4. CDN's failure to enforce any right does not waive future enforcement.

12.5. Licensee may not assign this Agreement without CDN's written consent.

12.6. Notices must be sent to: CDN Publishing LLC, ATTN: API Administrator, PO Box 1110, Virginia Beach, VA 23451

13. ACKNOWLEDGMENT AND AGREEMENT

By accessing or using the CDN API, Licensee acknowledges reading, understanding, and agreeing to all terms and conditions in this Agreement.

Effective Date: November 3, 2025

CDN Publishing, LLC

PO Box 1110

Virginia Beach, VA 23451