Card Validation Skill

What this skill does

Let your agent vet card numbers. Call it as an MCP tool to run a Luhn check and detect the card brand before your app accepts a payment. You switch it on with a single toggle — no SDK and no endpoint wiring — and it answers over MCP or REST using the same key as every other skill.

See it work

A real response from the Card Validation Skill — exactly what your agent gets back when it makes the call.

vervekit · cardvalidatortool call

{
  "number": "4900264223817524"
}

result

card: { … }
brand: Visa
cardNumber: 4900264223817524
bin: 490026
last4: 7524
isValid: true
isPotentiallyValid: true
isTestCard: false

+2 more fields

Run it with your own input. Live calls happen in your dashboard, on your key.

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Ways to use it

Validate at the edge of your app

Enable Card Validation so your app can validate card before it stores or acts on input — one skill, no separate validation service to run.

A guardrail tool for agents

Over MCP, your model can call cardvalidator to check an input is real and safe before it takes an action, closing off a common failure mode.

One request from any stack

Call Card Validation over REST from any backend to validate card inline in your pipeline, using the same key as every other skill.

Use it in your app

Once enabled, this skill is reachable two ways — pick whichever fits how you build. Both use the same key.

For AI agentsMCP

It appears to your model as a callable tool. No extra code — the agent invokes it when a task needs it.

cardvalidator

For apps & backendsREST

Call it from your server with one request and your key. Node, Python, Go — anything that can send a GET.

GET /v1/cardvalidator

Ask your agent

“Enable Card Validation and ask your agent to validate card.”
“Is this input real and safe to use?”

Card Validation Skill, answered

How to connect it over MCP or REST.

How do I add Card Validation to my app or agent?

Enable the Card Validation Skill on VerveKit, then reach it two ways with the same key: over MCP (it appears to your agent as the cardvalidator tool) or over REST (call it from any backend). No SDK to install and no endpoint to wire.

MCP or REST — which should I use?

Both work off one key. Use MCP when an AI agent should decide when to validate card — the skill shows up as a callable tool. Use REST when your own server-side code should call it directly. Many apps use both.

Which agents and frameworks does it work with?

Any MCP client — Claude, Cursor, LangChain, and custom agents all speak the Model Context Protocol, so Card Validation appears as a standard tool with nothing skill-specific to integrate.

How many credits does a Card Validation call cost?

Each call costs 1 credit. Every skill rides the same key and the same connection, so enabling more skills doesn't add more integrations to manage.

Do I need to install anything?

No SDK and no endpoint wiring — enabling the skill is a toggle. You point your agent at the VerveKit MCP endpoint (or call REST) and Card Validation is available immediately.

Where does the data come from, and what shows on my bill?

VerveKit runs on APIVerve, our production data engine; Card Validation is one of 300+ skills on the same key. Invoices and card statements show APIVERVE.

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Validate at the edge of your app

A guardrail tool for agents

One request from any stack

Card Validation Skill, answered

Give your software a way to act on the world.

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