Flyn
REMOTE · WWW.FLYN.TO
Create, edit and analyse short links and QR codes. OAuth sign-in works on the free plan.
Available components
Last scanned (52 minutes ago)
Scores higher than 97% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Marketing and SEO
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 Security94
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token. View diagnostics → Pass
- 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
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability63
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2871 tokens (~358/item across 8 items; 8 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 Management100
- No destabilizing schema changes in the last 30 days.Pass
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
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.
- 5 Nov 26 0
- Stability: 0.97 → pass security
- 4 Nov 26 0
- Stability: pass → 0.97 functional
- 30 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “create_qr_code” rewrote its description, which is the text the model reads security
- Tool “create_short_link” rewrote its description, which is the text the model reads security
- Tool “update_link” rewrote its description, which is the text the model reads security
- “create_qr_code” reworded the description of “type” cosmetic
- “list_links” reworded the description of “status” cosmetic
- “create_qr_code” dropped the optional parameter “wifiEnc” cosmetic
- “create_qr_code” dropped the optional parameter “wifiHidden” cosmetic
- “create_qr_code” dropped the optional parameter “wifiPass” cosmetic
- “create_qr_code” dropped the optional parameter “wifiSsid” cosmetic
- “create_short_link” dropped the optional parameter “password” cosmetic
- “update_link” dropped the optional parameter “password” cosmetic
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 19 Sept 26 0
- Stability: 0.97 → pass security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 21 Aug 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 5 Nov 2026 · Probed https://www.flyn.to/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=flyn.to | CN=YE1,O=Let's Encrypt,C=US | 20 Sept 2026 | 19 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 6f995334420654e2ca9f4d4b79d044fa967 |
| SANs: *.flyn.to, flyn.to | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.flyn.to. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| to. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer resource_metadata="https://www.flyn.to/.well-known/oauth-protected-resource/mcp"
Bearer resource_metadata="https://www.flyn.to/.well-known/oauth-protected-resource/mcp"| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains; preload |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' https://accounts.google.com https://apis.google.com https://www.googletagmanager.com https://www.google-analytics.com https://static.cloudflareinsights.com; style-src 'self' 'unsafe-inline' https://accounts.google.com; img-src 'self' data: blob: https:; font-src 'self'; connect-src 'self' https://*.supabase.co https://accounts.google.com https://api.resend.com https://www.google-analytics.com https://analytics.google.com https://*.analytics.google.com https://www.google.com https://stats.g.doubleclick.net https://cloudflareinsights.com; frame-src https://accounts.google.com https://www.youtube.com https://www.youtube-nocookie.com; frame-ancestors 'none'; base-uri 'self'; form-action 'self' https://accounts.google.com; object-src 'none'; upgrade-insecure-requests |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Protected resource metadata
| Document | https://www.flyn.to/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://www.flyn.to/mcp |
| Authorisation server | https://www.flyn.to |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.flyn.to/mcp | Verified | 200 | |
| http (plaintext) | http://www.flyn.to/mcp | HTTPS enforced | 308 | https://www.flyn.to/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_qr_code Create QR code ~718
Render a QR code for any of six content types: a link, plain text, a v-card contact, a pre-filled email, a phone number, or a pre-filled SMS. The image is returned as a PNG you can look at. Nothing is stored, so this code is STATIC: it encodes the content directly and cannot be changed after it is printed. If the user wants a code they can repoint later, or wants to count scans, create a short link with create_short_link first and then call get_link_qr_code instead. Link and Text work on every plan; V-card, E-mail, Call and SMS require Flyn Pro, as do custom colours and SVG output. WiFi codes contain the network password, so they are made in the Flyn dashboard's QR builder, not through this tool: never ask the user for a WiFi password.
| Name | Type | Req | Description |
|---|---|---|---|
| bg | string | – | Background colour as 6-digit hex, default #FFFFFF. Requires Flyn Pro. |
| string | – | For type 'email': the recipient address. | |
| emailBody | string | – | For type 'email': pre-filled message body. |
| emailSubject | string | – | For type 'email': pre-filled subject line. |
| fg | string | – | Foreground colour as 6-digit hex, default Flyn green #14532D. Requires Flyn Pro. |
| format | string | – | Output format: 'png' (default) or 'svg'. SVG requires Flyn Pro. |
| level | string | – | Error correction level: 'L', 'M' (default), 'Q' or 'H'. Higher levels survive more damage but make the symbol denser. |
| margin | integer | – | Quiet zone in modules. Minimum and default is 4, as required by ISO/IEC 18004; smaller values are raised to 4 because a short quiet zone is the most common cause of a printed code failing to scan. |
| phone | string | – | For type 'phone': the number to dial. Include the country code, for example +15551234567, or the code only works for people dialling from the same country. |
| size | integer | – | Maximum width in pixels, 64 to 2048, default 512. The image is the largest whole-module square that fits, so the real width is usually slightly smaller and is reported back. |
| smsBody | string | – | For type 'sms': the pre-filled message. The sender still has to press send. |
| smsPhone | string | – | For type 'sms': the number to text. Include the country code. |
| text | string | – | For type 'text': the plain text to show when scanned. |
| type | string | yes | What to encode. 'url' and 'text' work on any plan. 'vcard', 'email', 'phone' and 'sms' require Flyn Pro. |
| url | string | – | For type 'url': the URL to encode. |
| vcEmail | string | – | For type 'vcard': email address. |
| vcName | string | – | For type 'vcard': the person's full name. Required for a v-card. |
| vcOrg | string | – | For type 'vcard': organisation or company. |
| vcPhone | string | – | For type 'vcard': phone number. Include the country code, for example +15551234567. |
| vcUrl | string | – | For type 'vcard': website URL. |
No output schema declared.
No examples provided.
create_short_link Create short link ~651
Create a new Flyn short link that redirects to a destination URL. Returns the link id, slug, and full short URL. The destination is scanned with Google Safe Browsing before creation. Free accounts can create 25 links per calendar month; click limits, fallback URLs, weighted rotation, and conversion tracking require Flyn Pro. Password protection is set in the Flyn dashboard, not through this tool, so never ask the user for a link password.
| Name | Type | Req | Description |
|---|---|---|---|
| clickLimit | integer | – | Optional maximum number of human clicks before the link stops redirecting (Pro plan only). |
| conversionTracking | boolean | – | Enable per-link conversion tracking (Pro plan only). The redirect then appends an unguessable click id to the destination URL, and the link reports conversions and total conversion value next to its… |
| domain | string | – | Optional custom domain to mint the link on (must be a verified domain you own; Pro plan only). Omit to use your account default domain. |
| expiresAt | string | – | Optional ISO 8601 datetime after which the link stops redirecting. |
| fallbackUrl | string | – | Optional URL visitors are sent to after the click limit is reached (Pro plan only). |
| forwardParams | boolean | – | Whether query parameters appended to the short link are forwarded to the destination. Defaults to true. |
| rotation | array | – | Optional weighted rotation of destinations, one short link splitting traffic between several URLs (Pro plan only). Up to 12 destinations; sending more is rejected rather than truncated, so nothing is… |
| slug | string | – | Optional custom slug (letters, numbers, hyphens, underscores; max 100 chars). A random slug is generated when omitted. |
| tags | array | – | Optional tags for organizing links (Pro plan only). |
| title | string | – | Optional human-readable title for the link. |
| url | string | yes | The destination URL to shorten (https:// is assumed if no protocol is given). |
No output schema declared.
No examples provided.
delete_link Delete link ~40
Permanently delete a short link. The short URL immediately stops redirecting and this cannot be undone.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The link id to delete. |
No output schema declared.
No examples provided.
get_link Get link details ~58
Fetch one short link by its id, including destination, settings, total click count, and its conversion counters (conversionTracking, conversions, conversionValueCents).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The link id (from create_short_link or list_links). |
No output schema declared.
No examples provided.
get_link_analytics Get link analytics ~133
Fetch click events for a short link, newest first. Every plan sees timestamps and total counts; country, city, device, OS, browser, and referrer detail requires Flyn Pro (fields are null on the free plan). Free plans see the last 30 days of history. Click events carry no conversion data: for conversions and total conversion value, read the link itself with get_link or list_links.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The link id. |
| limit | integer | – | Click events per page (max 200 via MCP). |
| page | integer | – | Page number, starting at 1. |
No output schema declared.
No examples provided.
get_link_qr_code Get QR code for a link ~315
Render a scannable QR code for an existing Flyn short link. Because the code encodes the short link rather than the destination, you can repoint the link later and every printed code follows, and each scan is counted as a click. The image is returned as a PNG you can look at. Custom colours and SVG output require Flyn Pro.
| Name | Type | Req | Description |
|---|---|---|---|
| bg | string | – | Background colour as 6-digit hex, default #FFFFFF. Requires Flyn Pro. |
| fg | string | – | Foreground colour as 6-digit hex, default Flyn green #14532D. Requires Flyn Pro. |
| format | string | – | Output format: 'png' (default) or 'svg'. SVG requires Flyn Pro. |
| id | string | yes | The id of the link to render a QR code for. |
| level | string | – | Error correction level: 'L', 'M' (default), 'Q' or 'H'. Higher levels survive more damage but make the symbol denser. |
| margin | integer | – | Quiet zone in modules. Minimum and default is 4, as required by ISO/IEC 18004; smaller values are raised to 4 because a short quiet zone is the most common cause of a printed code failing to scan. |
| size | integer | – | Maximum width in pixels, 64 to 2048, default 512. The image is the largest whole-module square that fits, so the real width is usually slightly smaller and is reported back. |
No output schema declared.
No examples provided.
list_links List links ~203
List the account's short links with pagination, search, and filtering. Returns each link's id, slug, short URL, destination, click count, and settings, plus its conversion counters: conversionTracking (whether the link carries a click id), conversions, and conversionValueCents (total value reported for those conversions, in cents, not currency converted).
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results per page (max 100). |
| order | string | – | Sort direction. |
| page | integer | – | Page number, starting at 1. |
| search | string | – | Optional text search across slug, destination URL, and title. |
| sort | string | – | Sort column. |
| status | string | – | Optional filter: 'active' (not expired, archived or disabled by Flyn), 'expired' (past its expiry date or set to expired, and not archived), or 'archived'. |
| tag | string | – | Optional: only return links carrying this tag. |
No output schema declared.
No examples provided.
update_link Update link ~535
Update an existing short link. Can re-point the destination URL without changing the printed/shared short link, plus edit title, slug, tags, expiration, rotation destinations, and Pro settings. Only the provided fields are changed. Link passwords are managed in the Flyn dashboard, not through this tool.
| Name | Type | Req | Description |
|---|---|---|---|
| clickLimit | integer | – | Maximum human clicks before the link stops (Pro plan only). |
| conversionTracking | boolean | – | Enable or disable per-link conversion tracking (Pro plan only). Enabling only makes the redirect append a click id; conversions arrive from the Flyn tag or the server postback on the destination site. |
| expiresAt | string|null | – | New ISO 8601 expiration, or null to remove. |
| fallbackUrl | string | – | URL served after the click limit is reached (Pro plan only). |
| forwardParams | boolean | – | Forward appended query params to the destination. |
| id | string | yes | The link id to update. |
| rotation | array | – | Replacement list of weighted rotation destinations (Pro plan only). This REPLACES the whole list, so read the link first and send back every destination you are keeping, each with the id it already h… |
| slug | string | – | New slug (changes the short URL; the old slug stops working). |
| status | string | – | Link status. |
| tags | array | – | Replacement tag list. |
| title | string | – | New title. |
| url | string | – | New destination URL. |
No output schema declared.
No examples provided.
How do I install the Flyn MCP server?
Flyn is a hosted endpoint at https://www.flyn.to/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 · www.flyn.to
claude mcp add --transport http to-flyn-mcp 'https://www.flyn.to/mcp'
What is the Flyn MCP server?
Flyn is an MCP server listed in the public MCP registry as to.flyn/mcp. Create, edit and analyse short links and QR codes. OAuth sign-in works on the free plan. This page covers its hosted endpoint (https://www.flyn.to/mcp).
Is the Flyn MCP server safe to use?
Flyn scores 89 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 Flyn MCP server expose?
Flyn exposes 8 tools: create_short_link, list_links, get_link, update_link, delete_link, and 3 more. Their descriptions and schemas cost roughly 2,653 tokens of context every time the server is loaded.
Does the Flyn MCP server require authentication?
Yes. Flyn asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the Flyn MCP server still maintained?
Flyn is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.