generate_qr_code

SERVERX402 Middleware SOURCE@gadgethumans/x402

Medium RISK CLASS

Category Write

Parameters 71 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-gadgethumans-swarm-x402-middleware/generate-qr-code.md

WHAT IT DOES

What generate_qr_code does on X402 Middleware

AI agents use generate_qr_code to create or update resources in X402 Middleware, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your X402 Middleware environment.

Parameter	Type	Required
`ecc`	string	—
`size`	integer	—
`text`	string	Yes
`color`	string	—
`format`	string	—
`margin`	integer	—
`bgcolor`	string	—

Parameters from the server's own tool schema.

RISK

Why generate_qr_code is rated Medium

An AI agent can call generate_qr_code faster than any human can review: one bad instruction and it creates or modifies resources in X402 Middleware by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs generate_qr_code safely

PolicyLayer is an MCP gateway: it sits between your AI agents and X402 Middleware, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For generate_qr_code, this is the rule to start with:

generate_qr_code Rate-limited

generate_qr_code stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_qr_code": {
      "limits": [
        {
          "counter": "generate_qr_code_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect X402 Middleware, apply this rule, and every generate_qr_code call is checked against it from then on.

FAQ

Questions about generate_qr_code

What does the generate_qr_code tool do? +

Generate a QR code image and return it as Base64-encoded data. Use this when you need to encode a URL, text, or other data into a QR code image that can be displayed or embedded in documents/web pages. Parameters: text — The text or URL to encode in the QR code (required). format — Output image format: "png", "svg", or "gif" (default: "png"). size — Image size in pixels (100-1000, default: 300). color — Foreground hex color (without #, default: "000000"). bgcolor — Background hex color (without #, default: "FFFFFF"). ecc — Error correction level: "L", "M", "Q", or "H" (default: "M"). Higher levels allow more damage before the code becomes unreadable. margin — Margin in modules (0-20, default: 4). It is categorised as a Write tool in the X402 Middleware MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does generate_qr_code accept? +

generate_qr_code accepts 7 parameters: ecc, size, text, color, format, margin, bgcolor. Required: text. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on generate_qr_code? +

Register the X402 Middleware MCP server in PolicyLayer and add a rule for generate_qr_code: 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 X402 Middleware. Nothing to install.

What risk level is generate_qr_code? +

generate_qr_code is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generate_qr_code? +

Yes. Add a rate_limit block to the generate_qr_code 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.

How do I block generate_qr_code completely? +

Set action: deny in the PolicyLayer policy for generate_qr_code. 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.

What MCP server provides generate_qr_code? +

generate_qr_code is provided by the X402 Middleware MCP server (@gadgethumans/x402). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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