QRtracer

by danieldedaniel · remote · no sign-in to list tools · v2.0.0 · published by GitHub user danieldedaniel

Create and manage dynamic QR codes, export QR images, compare scan analytics and check QR links.

Deletes · 3Changes · 2

Compare Registry entry

11 tools: 3 can delete or cancel things, 2 change things and 6 only read.

Scanned Oct 21, 2026

Deletes or cancels3Claude Code: deny: see these tools
Can't be undone0Claude Code: ask
Changes things2Claude Code: ask: see these tools
Only reads6Claude Code: allow: see these tools

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http qrtracer https://qrtracer.io/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warncheck_qr_link
The server marks "check_qr_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_qr_link" says "link": a word for a change.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

11 tools

Deletes or cancels 3Removes, cancels or revokes something.Claude Code: deny

create_qrCreate a dynamic QR code for a public HTTP(S) destination.No findings
Why it is in this group
- The name "create_qr" says "create": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Create a dynamic QR code for a public HTTP(S) destination. Supply a UUID request_key to safely retry authenticated creation. Anonymous creation is limited; ALWAYS show its returned claim_url to the user. Account creation uses existing plan limits.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: false
- openWorldHint: true
set_routingLegacy Programmable tool: compile a plain-language routing prompt or save a valid supplied routing program on an owned code.No findings
Why it is in this group
- The name "set_routing" says "set": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Legacy Programmable tool: compile a plain-language routing prompt or save a valid supplied routing program on an owned code. Version conflicts require reading again.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: false
- openWorldHint: true
update_destinationChange an owned QR destination without changing its printed redirect URL.No findings
Why it is in this group
- The name "update_destination" says "update": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Change an owned QR destination without changing its printed redirect URL. Confirm the intended destination with the user. Supply expected_revision from get_qr_code; conflict means read again before retrying.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: true
- openWorldHint: true

Changes things 2Creates or changes something that can be changed back.Claude Code: ask

check_qr_linkCheck a public QR destination's current HTTP reachability, redirect chain and known general provider policies.1 finding
Why it is in this group
- The name "check_qr_link" says "link": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "check_qr_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_qr_link" says "link": a word for a change.
  What this check looks for
Description, as the server wrote it
Check a public QR destination's current HTTP reachability, redirect chain and known general provider policies. Cannot determine exact expiry, account state or destination safety.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
simulate_scanDry-run a routing program against a sample scan context.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Dry-run a routing program against a sample scan context. Does not create a scan or change a code.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Only reads 6Looks things up and changes nothing.Claude Code: allow

compare_qr_codesCompare aggregate human scan counts for 2 to 10 owned QR codes over the same period.No findings
Why it is in this group
- The name "compare_qr_codes" says "compare": a word for reading.
Description, as the server wrote it
Compare aggregate human scan counts for 2 to 10 owned QR codes over the same period. Do not infer conversion rates without separate conversion data.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_accountRead the connected account's plan and available capabilities.No findings
Why it is in this group
- The name "get_account" says "get": a word for reading.
Description, as the server wrote it
Read the connected account's plan and available capabilities. Does not include email or billing details.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_analyticsRead aggregate recorded human scans for one owned code.No findings
Why it is in this group
- The name "get_analytics" says "get": a word for reading.
Description, as the server wrote it
Read aggregate recorded human scans for one owned code. Default period is 28 days; history follows the current plan. Scans are not conversions or unique people.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_qr_codeInspect an owned QR code, destination, design, latest stored link health and revision.No findings
Why it is in this group
- The name "get_qr_code" says "get": a word for reading.
Description, as the server wrote it
Inspect an owned QR code, destination, design, latest stored link health and revision. Read before updating.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
list_qr_codesFind only your owned QR codes, with label search and stable cursor pagination.No findings
Why it is in this group
- The name "list_qr_codes" says "list": a word for reading.
Description, as the server wrote it
Find only your owned QR codes, with label search and stable cursor pagination.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
render_qrPreview and download an owned QR as PNG, or eligible SVG.No findings
Why it is in this group
- The description's first verb is "preview": a word for reading.
Description, as the server wrote it
Preview and download an owned QR as PNG, or eligible SVG. Returns a short-lived download URL; do not expose private connection tokens. Existing anonymous PNG URLs remain supported.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 2.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http qrtracer https://qrtracer.io/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__qrtracer__get_account",
      "mcp__qrtracer__list_qr_codes",
      "mcp__qrtracer__get_qr_code",
      "mcp__qrtracer__get_analytics",
      "mcp__qrtracer__compare_qr_codes",
      "mcp__qrtracer__render_qr"
    ],
    "ask": [
      "mcp__qrtracer__check_qr_link",
      "mcp__qrtracer__simulate_scan"
    ],
    "deny": [
      "mcp__qrtracer__create_qr",
      "mcp__qrtracer__update_destination",
      "mcp__qrtracer__set_routing"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as qrtracer. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.danieldedaniel/qrtracer/changes.xml

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5 of these tools change something. Run those as governed actions.

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Source: MCP Registry. Synced Oct 21, 2026, 18:29 UTC.

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