Introduction
Learn how to quickly and easily embed Carta data into your app.
Discover APIs, integration guides and other documentation to embed Carta data into your systems and workflows.
Carta’s developer platform is part of our mission to empower partner organizations to provide a better service to our joint customers through connected and accurate data. Our APIs are built to enable robust integrations to better serve our network of equity owners, stakeholders, investors and partners and support your team’s unique use cases.
Explore our APIs
Launch
Allows incorporation partners and law firms to programmatically send new customers to Carta
Investor
Allows fund operators to retrieve summary cap table insights for their portfolio holdings
Issuer
Allows law firms and technology partners to fetch cap table information on behalf of the company
Portfolio
Allows personal finance management partners to aggregate holdings inclusive of equity data
CRM
Allows funds to manage their deal and fundraising relationships across the investment process
Try our mocking service
We invite you to experiment with our mocking service before you're ready to go live. It doesn't require genuine credentials and always returns static but valid responses to your requests. Go to our API Reference, select the https://mock-api.carta.com option for the Base URL, and specify any string for OAuth2 authentication. Click Try It! and you will see an example response to that request.

Start building
Ready to start building? Here’s how a typical integration looks like:
Kick-off
- Follow our quickstart guide to register for Carta’s developer portal and create your Playgrounds app
- Schedule a progress check-in call with Carta
- Share an estimate for your target launch timeframe
Development
- Leverage our Guides and API Reference documentation as you build your integration
- Check out our FAQ & Support page if you need help
- Once you're ready to migrate to production, submit a production access request form
- Confirm your announcement, enablement plans, and launch date with us