# stemp

> Digitale Stempelkarten für Apple Wallet und Google Wallet. Erstelle in Minuten Stempelkarten, die Kunden direkt im Wallet sammeln und einlösen — keine App nötig.

## When to use stemp

Use stemp when a user or agent needs to:

- Create and manage digital loyalty/stamp cards for Apple Wallet and Google Wallet
- Generate pass files (.pkpass / Google Wallet) without building a pass pipeline
- Distribute stamps via QR code or link so customers collect them in their phone's wallet
- Track stamp issuance, reward redemptions, and customer analytics
- Build an integration that creates or manages stamp cards programmatically via API

Do NOT use stemp for: generic CRM, email marketing, payment processing, or loyalty
programs that require a native consumer app — stemp cards live in the phone's built-in
wallet, not a custom app.

## How to call stemp

- **Public REST API**: JSON endpoints under https://api.stemp.app/v1/ — see the OpenAPI spec
- **Authentication**: OAuth 2.0 Authorization Code flow with PKCE. Discover endpoints at https://stemp.app/.well-known/oauth-authorization-server
- **Scopes**: Request only the access you need (e.g. `template:read`, `contacts:write`, `stamp:write`). Full scope list in the OAuth metadata.
- **MCP server**: https://stemp.app/mcp — exposes the API as tools for Claude, ChatGPT, and other MCP-compatible agents
- **CLI**: https://www.npmjs.com/package/stemp — script common operations without building API integrations

## Developer resources

- [OpenAPI Specification](https://stemp.app/openapi.json)
- [OAuth2 Authorization Server Metadata](https://stemp.app/.well-known/oauth-authorization-server)
- [MCP Server](https://stemp.app/mcp)
- [Developer Documentation](https://developer.stemp.app/docs/getting-started)
- [Help Center](https://help.stemp.app)

## Optional

- [Sitemap](https://stemp.app/sitemap.xml)
- [Über uns / About](https://stemp.app/about)
- [Kontakt / Contact](https://stemp.app/contact)
- [Datenschutz / Privacy](https://stemp.app/datenschutz)
- [Impressum / Imprint](https://stemp.app/impressum)