PREFLIGHT — URL Routing for AI Agents
REMOTE · PREFLIGHT-API-PRODUCTION-01A2.UP.RAILWAY.APP · SCANNED AUG 17
Choose HTTP, browser, machine endpoint, or avoid before an agent visits an unfamiliar URL.
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 →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- 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 Usability80
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 256 tokens (~128/item across 2 items; 2 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage73
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 20% of tool parameters carry a description.Partial
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · preflight-api-production-01a2.up.railway.app
claude mcp add --transport http gsterlingpress-preflight https://preflight-api-production-01a2.up.railway.app/mcp
[mcp_servers.gsterlingpress-preflight] url = "https://preflight-api-production-01a2.up.railway.app/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"gsterlingpress-preflight": {
"type": "remote",
"url": "https://preflight-api-production-01a2.up.railway.app/mcp",
"enabled": true
}
}
} openclaw mcp add gsterlingpress-preflight --url https://preflight-api-production-01a2.up.railway.app/mcp --transport streamable-http
mcp_servers:
gsterlingpress-preflight:
url: "https://preflight-api-production-01a2.up.railway.app/mcp" {
"mcpServers": {
"gsterlingpress-preflight": {
"type": "http",
"url": "https://preflight-api-production-01a2.up.railway.app/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.
- 17 Aug 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.
- 15 Aug 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.
- 14 Aug 26 0
- Server version: 0.7.4 → 0.7.5 functional
- 13 Aug 26 +7
- Authorization: unverified → partial ▲ security
- The server rewrote its instructions, which are the text every model session reads security
- Tool “preflight_check” rewrote its description, which is the text the model reads security
- “preflight_check” reworded the description of “url” cosmetic
- Tool “preflight_check” changed its title: Check URL Before Fetching cosmetic
- Tool “preflight_feedback” changed its title: Report PREFLIGHT Outcome cosmetic
- 12 Aug 26 +3
- The server rewrote its instructions, which are the text every model session reads security
- Tool “preflight_check” rewrote its description, which is the text the model reads security
- Tool “preflight_feedback” rewrote its description, which is the text the model reads security
- Schema quality: 65 → 132 ▼ functional
- Stability: unverified → 0.03 ▲ functional
- Schema quality: good → excellent functional
- Server version: 0.6.0 → 0.7.4 functional
- “preflight_check” reworded the description of “url” cosmetic
- 11 Aug 26 59
First indexed and scored.
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 17 Aug 2026 · Probed https://preflight-api-production-01a2.up.railway.app/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.up.railway.app | CN=YE1,O=Let's Encrypt,C=US | 29 Jul 2026 | 27 Oct 2026 | ECDSA 256 | ECDSA-SHA384 | 6da79bb561da3efeb0e751ca21abd3999fe |
| SANs: *.up.railway.app, up.railway.app | ||||||
| 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 |
DNSSEC insecure
Validation of preflight-api-production-01a2.up.railway.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| app. | present | 23684 | 8 | Verified |
| railway.app. | 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 |
|---|---|
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | no-referrer |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://preflight-api-production-01a2.up.railway.app/mcp | Verified | 200 | |
| http (plaintext) | http://preflight-api-production-01a2.up.railway.app/mcp | HTTPS enforced | 301 | https://preflight-api-production-01a2.up.railway.app/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.
preflight_check Check URL Before Fetching ~106
Before fetching, crawling, scraping, opening, or browser-rendering an unfamiliar http/https URL, call this with the ACTUAL destination URL. Returns the best first route: HTTP, BROWSER, MACHINE_ENDPOINT, or AVOID, plus access/JS/size/cost hints. Do not substitute example.com when a real task URL is available.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Actual absolute http/https destination URL from the current task. Use before the first fetch or browser request. |
No output schema declared.
No examples provided.
preflight_feedback Report PREFLIGHT Outcome ~59
After following a PREFLIGHT recommendation, report whether the chosen route worked so PREFLIGHT can improve future recommendations.
| Name | Type | Req | Description |
|---|---|---|---|
| latencyMs | number | – | – |
| outcome | string | yes | – |
| route | string | yes | – |
| url | string | yes | – |
No output schema declared.
No examples provided.