# PREFLIGHT — URL Routing for AI Agents (remote · preflight-api-production-01a2.up.railway.app)

Choose HTTP, browser, machine endpoint, or avoid before an agent visits an unfamiliar URL.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-17

## Components

- remote · `preflight-api-production-01a2.up.railway.app`: 71/100 (this document), [markdown](https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2.md), [page](https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2)

## Channel facts

- Endpoint: `https://preflight-api-production-01a2.up.railway.app/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.7.5`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-17.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 80/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 256 tokens (~128/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 73/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 20% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http gsterlingpress-preflight https://preflight-api-production-01a2.up.railway.app/mcp
```

### Codex

```toml
[mcp_servers.gsterlingpress-preflight]
url = "https://preflight-api-production-01a2.up.railway.app/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "gsterlingpress-preflight": {
      "type": "remote",
      "url": "https://preflight-api-production-01a2.up.railway.app/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add gsterlingpress-preflight --url https://preflight-api-production-01a2.up.railway.app/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  gsterlingpress-preflight:
    url: "https://preflight-api-production-01a2.up.railway.app/mcp"
```

### Other

```json
{
  "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.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-17 (score 71, +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.

### 2026-08-15 (score 70, +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.

### 2026-08-14 (score 69, 0)

- [functional] Server version: 0.7.4 → 0.7.5

### 2026-08-13 (score 69, +7)

- [security improvement] 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
- [cosmetic] “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

### 2026-08-12 (score 62, +3)

- [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] Tool “preflight_feedback” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 65 → 132
- [functional improvement] Stability: unverified → 0.03
- [functional] Schema quality: good → excellent
- [functional] Server version: 0.6.0 → 0.7.4
- [cosmetic] “preflight_check” reworded the description of “url”

### 2026-08-11 (score 59)

First indexed and scored.

## MCP tools (2)

### `preflight_check` (~106 tokens)

Check URL Before Fetching

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.

Input parameters:

- `url` (string, required): Actual absolute http/https destination URL from the current task. Use before the first fetch or browser request.

### `preflight_feedback` (~59 tokens)

Report PREFLIGHT Outcome

After following a PREFLIGHT recommendation, report whether the chosen route worked so PREFLIGHT can improve future recommendations.

Input parameters:

- `latencyMs` (number)
- `outcome` (string, required)
- `route` (string, required)
- `url` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2#diagnostics

## Score history

- 2026-08-17: 71
- 2026-08-16: 70
- 2026-08-15: 70
- 2026-08-14: 69
- 2026-08-13: 69
- 2026-08-12: 62
- 2026-08-11: 59

## Links

- Remote endpoint: https://preflight-api-production-01a2.up.railway.app/mcp
- Repository: https://github.com/GSterlingPress/preflight-api
- Changelog RSS feed: https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2.xml
- Changelog JSON feed: https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2.json
- HTML version of this page: https://verifymcp.io/servers/gsterlingpress-preflight/preflight-api-production-01a2