Generate a styled QR code image with custom colors, logos, dot styles, and corner shapes. Supports PNG and SVG output. Returns base64-encoded image data. When the content is a URL, a tracked short link is created automatically — the QR encodes the short URL for click analytics.
Risk signalsAccepts raw HTML/template content (content)
Part of the Qr Maker server.
Free to start. No card required.
AI agents use generate_qr to create or modify resources in Qr Maker. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call generate_qr repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Qr Maker.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"generate_qr": {
"limits": [
{
"counter": "generate_qr_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Qr Maker policy for all 19 tools.
These attack patterns abuse exactly the kind of access generate_qr gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Generate a styled QR code image with custom colors, logos, dot styles, and corner shapes. Supports PNG and SVG output. Returns base64-encoded image data. When the content is a URL, a tracked short link is created automatically — the QR encodes the short URL for click analytics.. It is categorised as a Write tool in the Qr Maker MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Qr Maker MCP server in PolicyLayer and add a rule for generate_qr: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Qr Maker. Nothing to install.
generate_qr is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the generate_qr rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for generate_qr. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
generate_qr is provided by the Qr Maker MCP server (@qr-maker/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Qr Maker tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.