# Capital One Data Protection and Client Authentication Public Key Sharing API

**Canonical:** https://apis.io/apis/capital-one/data-protection-and-client-authentication-public-key-sharing-api/  
**Provider:** Capital One — https://apis.io/providers/capital-one/  
**Base URL:** https://api-sandbox.capitalone.com  
**Documentation:** https://developer.capitalone.com/products/data-protection-and-client-authentication-public-key-sharing?id=9721-1

Capital One Data Protection and Client Authentication Public Key Sharing API is one of 14 APIs that [Capital One](https://apis.io/providers/capital-one/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Security, Authentication, and United States. The published artifact set on APIs.io includes API documentation.

The Capital One Data Protection and Client Authentication Public Key Sharing API lets integrating clients securely exchange public keys with Capital One to establish encrypted, authenticated communication for sensitive data in transit. It is a supporting security primitive for the broader DevExchange API catalog rather than a business-data endpoint. Access is OAuth 2.0 secured with sandbox testing and partner approval for production. Documentation is HTML-only on the DevExchange portal and no downloadable OpenAPI definition is published.

## Machine-readable artifacts (1)

- **Documentation** — https://developer.capitalone.com/products/data-protection-and-client-authentication-public-key-sharing?id=9721-1

## Other Capital One APIs (12)

- [Capital One Account Lookup API](https://apis.io/apis/capital-one/account-lookup-api/)
- [Capital One Authorizations API](https://apis.io/apis/capital-one/authorizations-api/)
- [Capital One Credit Offers API](https://apis.io/apis/capital-one/credit-offers-api/)
- [Capital One Customer Transactions](https://apis.io/apis/capital-one/customer-transactions/)
- [Capital One Digital Auto Financing Credit Application API](https://apis.io/apis/capital-one/digital-auto-financing-credit-application-api/)
- [Capital One Enhanced Decisioning Data API](https://apis.io/apis/capital-one/enhanced-decisioning-data-api/)
- [Capital One In-Store Credit Card Payments API](https://apis.io/apis/capital-one/in-store-credit-card-payments-api/)
- [Capital One POS Credit Card Application API](https://apis.io/apis/capital-one/pos-credit-card-application-api/)
- [Capital One Partner Account Summary API](https://apis.io/apis/capital-one/partner-account-summary-api/)
- [Capital One Pre-Application Orchestrator API](https://apis.io/apis/capital-one/pre-application-orchestrator-api/)
- [Capital One Real-Time Proactive Prescreen API](https://apis.io/apis/capital-one/real-time-proactive-prescreen-api/)
- [Capital One Retrieve Consumer Bank Products API](https://apis.io/apis/capital-one/retrieve-consumer-bank-products-api/)

## Tags

Security, Authentication, United States

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/capital-one/data-protection-and-client-authentication-public-key-sharing-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/capital-one/.