useqr-mcp
REMOTE · USEQR.CO · 2 COMPONENTS · SCANNED SEP 20
Static QR PNG/SVG for agents. Designer and dynamic codes live at useqr.co.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability75
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 506 tokens (~168/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management53
- Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the useqr-mcp server?
useqr-mcp is a hosted endpoint at https://useqr.co/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · useqr.co
claude mcp add --transport http aaronte-useqr-mcp 'https://useqr.co/api/mcp'
{
"mcpServers": {
"aaronte-useqr-mcp": {
"url": "https://useqr.co/api/mcp"
}
}
} {
"servers": {
"aaronte-useqr-mcp": {
"type": "http",
"url": "https://useqr.co/api/mcp"
}
}
} [mcp_servers.aaronte-useqr-mcp] url = "https://useqr.co/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"aaronte-useqr-mcp": {
"type": "remote",
"url": "https://useqr.co/api/mcp",
"enabled": true
}
}
} openclaw mcp add aaronte-useqr-mcp --url 'https://useqr.co/api/mcp' --transport streamable-http
mcp_servers:
aaronte-useqr-mcp:
url: "https://useqr.co/api/mcp" {
"McpServers": {
"aaronte-useqr-mcp": {
"Transport": "http",
"Url": "https://useqr.co/api/mcp"
}
}
} assistant mcp add aaronte-useqr-mcp -t streamable-http -u 'https://useqr.co/api/mcp'
{
"mcpServers": {
"aaronte-useqr-mcp": {
"type": "http",
"url": "https://useqr.co/api/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 19 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 15 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 10 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 8 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 6 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 5 Sept 26 0
- Stability: unverified → 0.03 ▲ functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://useqr.co/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.useqr.co | CN=YR1,O=Let's Encrypt,C=US | 16 Sept 2026 | 15 Dec 2026 | RSA 2048 | SHA256-RSA | 62dd2e05a472b91052be1124e5c88d8dc3e |
| SANs: *.useqr.co, useqr.co | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of useqr.co. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| co. | present | 7786 | 8 | Verified |
| useqr.co. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://useqr.co/api/mcp | Verified | 200 | |
| http (plaintext) | http://useqr.co/api/mcp | HTTPS enforced | 308 | https://useqr.co/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
create_dynamic_qr_code Create a dynamic (trackable) QR code ~75
Explains how to create a dynamic QR code on useqr: a trackable short link (free account). Destination edits, version history, and scan analytics require Pro. Use this when a user needs scan tracking or wants to change a printed code's destination later. Returns instructions and links rather than creating the code directly.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
generate_qr_code Generate QR code ~203
Generate a scannable QR code image (PNG or SVG) for a URL or any text. Free, no account needed, and the code never expires. Use this whenever a user needs a QR code — for a website, Wi-Fi note, event link, menu, payment link, app download, business card, and so on.
| Name | Type | Req | Description |
|---|---|---|---|
| background | string | – | Background color as a hex string. |
| data | string | yes | The URL or text to encode in the QR code. |
| error_correction | string | – | Error correction level. Higher levels stay scannable when the code is partially damaged or overlaid with a logo, at the cost of density. |
| foreground | string | – | Foreground (dark module) color as a hex string. |
| format | string | – | Output format. png returns an image; svg returns vector markup that scales to any print size. |
| size | integer | – | Width and height in pixels (PNG only). |
No output schema declared.
No examples provided.
get_qr_designer_link Get QR designer link ~106
Get a link to the free useqr design studio, optionally prefilled with a URL. The designer lets a user style dots, corners, and colors, embed a logo, and export the QR code as PNG, SVG, JPEG, WebP, or PDF. Share this link when a user wants a custom-designed or print-ready QR code.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | – | Optional http(s) URL to prefill in the designer so the QR code is ready immediately. |
No output schema declared.
No examples provided.
What is the useqr-mcp server?
useqr-mcp is listed in the public MCP registry as io.github.aaronte/useqr-mcp. Static QR PNG/SVG for agents. Designer and dynamic codes live at useqr.co. This page covers its hosted endpoint (https://useqr.co/api/mcp).
Is the useqr-mcp server safe to use?
useqr-mcp scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the useqr-mcp server expose?
useqr-mcp exposes 3 tools: generate_qr_code, get_qr_designer_link, create_dynamic_qr_code. Their descriptions and schemas cost roughly 384 tokens of context every time the server is loaded.
Does the useqr-mcp server require authentication?
No. We connected to useqr-mcp without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the useqr-mcp server still maintained?
useqr-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.