# `dev.cz-agents/payqr` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/dev.cz-agents/payqr
- JSON: https://anlyon.dev/api/v1/servers/dev.cz-agents/payqr
- Version: 0.1.11 (active)
- Publisher: dev.cz-agents (domain proven to the MCP Registry)
- Runs: remote (streamable-http), local (npm)
- Sign-in to list tools: none
- Repository: https://github.com/martinhavel/cz-agents-mcp
- Metadata from the official MCP Registry, synced 2026-10-21T18:11:46.759Z

Title and description, as the publisher wrote them:

```untrusted-server-text
European payment QR — SPAYD (CZ/SK) & EPC/GiroCode (SEPA), plus text/WiFi/vCard. Local, free.
```

Scanned 2026-10-21T19:11:55.506Z over streamable-http.

**6 tools: 2 do something that can't be undone, 3 change things and 1 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 2 | ask |
| Changes things | write | 3 | ask |
| Only reads | read | 1 | allow |

## Findings

- **warn** Annotations that disagree with the tool in `qr_payment` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "qr_payment" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "qr_payment" says "payment": a word that usually means money moves, which cannot be taken back.
```

- **warn** Annotations that disagree with the tool in `qr_text` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "qr_text" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "create": a word for a change.
```

- **warn** Annotations that disagree with the tool in `qr_wifi` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "qr_wifi" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "create": a word for a change.
```

- **warn** Annotations that disagree with the tool in `qr_vcard` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "qr_vcard" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The description's first verb is "create": a word for a change.
```

- **warn** Annotations that disagree with the tool in `qr_payment_batch` ([annotation-conflict](https://anlyon.dev/methodology#annotation-conflict))

```untrusted-server-text
The server marks "qr_payment_batch" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "qr_payment_batch" says "payment": a word that usually means money moves, which cannot be taken back.
```


## Can't be undone (2)

Sends, pays, publishes or merges: once done, it cannot be taken back. Claude Code: ask.

### `qr_payment`

- The name "qr_payment" says "payment": a word that usually means money moves, which cannot be taken back.
- The input carries an amount (input.amount) and a currency, so it moves money.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Create a European payment QR code. Auto-selects SPAYD for CZ/SK IBANs and EPC/GiroCode for other SEPA IBANs.
```

### `qr_payment_batch`

- The name "qr_payment_batch" says "payment": a word that usually means money moves, which cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
PAID. Create payment QR codes for a whole batch of payments in one call — e.g. an invoice run. The free qr_payment tool handles one payment per call; this one returns the whole set. Requires payment via x402; call without payment first to receive the terms.
```

## Changes things (3)

Creates or changes something that can be changed back. Claude Code: ask.

### `qr_text`

- The description's first verb is "create": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Create a QR code containing plain text.
```

### `qr_vcard`

- The description's first verb is "create": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Create a QR code containing a vCard 3.0 contact.
```

### `qr_wifi`

- The description's first verb is "create": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
- Findings: warn annotation-conflict

Description, as the server wrote it:

```untrusted-server-text
Create a Wi-Fi network QR code.
```

## Only reads (1)

Looks things up and changes nothing. Claude Code: allow.

### `qr_read`

- The name "qr_read" says "read": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
Decode a QR code from a base64 PNG/JPEG image or image data URI and classify its content.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `payqr`:

```json
{
  "permissions": {
    "allow": [
      "mcp__payqr__qr_read"
    ],
    "ask": [
      "mcp__payqr__qr_payment",
      "mcp__payqr__qr_text",
      "mcp__payqr__qr_wifi",
      "mcp__payqr__qr_vcard",
      "mcp__payqr__qr_payment_batch"
    ],
    "deny": []
  }
}
```