# Stampcard — digital stamp cards for small shops, no app for the customer

> Create a shop program, hand customers a browser stamp card by QR poster, stamp it from a phone.

- name: app.rowb.stampcard/cards
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 82/100 flags: no-repository
- quality: 79/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/app.rowb.stampcard%2Fcards
- tools: https://api.protogrid.dev/v1/servers/app.rowb.stampcard%2Fcards/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "cards": {
      "type": "http",
      "url": "https://stampcard.rowb.app/mcp",
      "headers": {
        "Authorization": "Bearer ${CARDS_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${CARDS_TOKEN}`.

## Trust

- hygiene: 80
- liveness: 98
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-96% +updated-27d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 79/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: get_card (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); program_stats (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); redeem (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 299 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 299 tokens to load them all
- tool set hash: 97631a075f2cc4fad76bf9cffb9df3ca
- badge: [![protogrid quality](https://protogrid.dev/badge/app.rowb.stampcard/cards.svg)](https://protogrid.dev/servers/app.rowb.stampcard/cards)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://stampcard.rowb.app/mcp (streamable-http, auth none, reachable true, uptime30d 0.9611651)

## Packages

_none_

## Tools (5)

- `create_program`: Create or update the shop program: shop name, reward text, stamps required before a reward. Returns the program and its join URL (the poster target).
- `get_card`: Read one customer card: how many stamps, what the reward is, whether it is ready to redeem.
- `program_stats`: Program plus this month stamp usage and quota, so a shop can tell how close it is to the free limit.
- `redeem`: Redeem the reward on a card that has reached its required stamps. Resets the stamp count and increments the rewards-earned counter.
- `stamp`: Add one stamp to a customer card. Identify the card by its 8-character code (from the customer page) or by its token. One stamp per card per day unless allow_multiple is true.