Design, test and explain.
A free sandbox with simulated cardholders and purchases, explained controls, program-brief export and a free 30-minute design session. No signup to test; an account saves your work across devices.
Card programs for the people your product serves Cards for your customers.
Cards for your customers.
Your rules on every purchase.
Design business-funded virtual cards for customers, teams or authorized AI agents. Add your brand, set the controls and test purchases before an issuing program is approved.
Program sandbox available now. No real cards or money move. Real issuing requires signed partner terms and program review.
Virtual card design preview. Artwork and issuer/network marks require partner approval.
$4.00 at Corner Bakery
Sandbox approvalCorporate-funded · within a $5/day modeled cap
Start with the program and funding relationship
Who receives the card?
The first issuing proposal is corporate funded. Other funding relationships remain useful sandbox models and need separate product review.
One complete program loop
Subscriber perk card
A bakery purchase opens a 15-minute window. The company funds the card balance and APPEN evaluates the whole purchase.
- Cardholder
- Maya · subscriber
- Funded by
- Corporate sponsor
- Boundary
- Initial corporate-funded proposal; Operations approval pending.
Run a program scenario Sandbox
Ready to test
Run a scenario to see funding, category, amount and approval checks.
The whole program, in viewA card is one piece.
Explore program anatomy A card is one piece.
The relationships matter.
Useful examples, ready to changeStart with a program.
All program templates Start with a program.
Make it yours.
What you can inspect today
Read the versioned rule spec Proof in the work.
| What you need | Corporate spend tools | Issuing API alone | Appen today |
|---|---|---|---|
| Starting point | Your team’s expenses | Card infrastructure | Recipients, funding and program rules |
| Runnable program model | Product-dependent | You build it | Eight runnable models with scope labels |
| Explain every decision | Product-dependent | You compose the trace | Inspectable rule-by-rule artifacts |
| Partner-review brief | Product-dependent | You assemble it | Export the model and tested scenarios |
| Real cards today | Provider and eligibility dependent | Partner approval required | Not yet available |
Category comparison, not a claim about every provider. These examples are not customers or partner-approved programs.
Free program designLeave with a program.
Leave with a program.
And the questions to resolve.
In 30 minutes, shape a working model of your cardholder and funding flow. Test three purchases, including a failure or approval, and export a one-page brief for your cofounder or a potential issuing partner.
Private sharing requires an Appen account. Production issuing, custody, onboarding and commercial terms remain open questions.
Book a free 30-minute session How the session worksCurrent stageDesign now.
Design now.
Plan the next step.
- Program models and scenario tests
- Explained decisions and program briefs
- Real cards and money movement: not live
Built by Dalton Redden at Blind Billing LLC, St. Louis.
dalton.redden@getappen.comProduct status · October 2026Build the model today.
Available now Confirmed · not contracted Not available yet Read the full product status
Build the model today.
Know what comes next.
External authorization decisions.
A program manager has confirmed External Auth: Appen must answer every authorization within one second. No response means decline; no transaction filtering on the manager’s side is assumed. The agreement is not signed and production performance has not been measured.
Real cards and final pricing.
The initial proposal is corporate-funded USD virtual cards for individuals and authorized software delegates. Client/sub-client structure, artwork, permitted rule variation and product setup still need written Operations approval. No signed issuing agreement, production issuer credentials, live cards or committed launch date. Pricing will follow confirmed partner costs. No payment is required to use this sandbox.