# LaunchCheck x402 (remote · launchcheck-x402.fly.dev)

Paid x402 MCP tool for stress-testing launch and marketing copy before publication.

- Trust score: 67/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-20

## Components

- remote · `launchcheck-x402.fly.dev`: 67/100 (this document), [markdown](https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402.md), [page](https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402)

## Channel facts

- Endpoint: `https://launchcheck-x402.fly.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-08-20.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 1 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 71/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 286 tokens (~286/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 17/100
  - Stability observed for 5 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 apolito53-launchcheck-x402 https://launchcheck-x402.fly.dev/mcp
```

### Codex

```toml
[mcp_servers.apolito53-launchcheck-x402]
url = "https://launchcheck-x402.fly.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "apolito53-launchcheck-x402": {
      "type": "remote",
      "url": "https://launchcheck-x402.fly.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add apolito53-launchcheck-x402 --url https://launchcheck-x402.fly.dev/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  apolito53-launchcheck-x402:
    url: "https://launchcheck-x402.fly.dev/mcp"
```

### Other

```json
{
  "mcpServers": {
    "apolito53-launchcheck-x402": {
      "type": "http",
      "url": "https://launchcheck-x402.fly.dev/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.

### 2026-08-20 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-18 (score 66, +1)

- [security] The server changed its declared name: LaunchCheck x402 → ReactionCheck x402
- [security] Tool “reaction_check” rewrote its description, which is the text the model reads

### 2026-08-16 (score 65, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-08-15 (score 64)

First indexed and scored.

## MCP tools (1)

### `reaction_check` (~286 tokens)

Review and stress-test launch messaging, landing pages, product announcements, pricing pages, changelogs, app-store listings, and marketing emails before publication. LaunchCheck evaluates copy through eight audience lenses, surfaces positioning and conversion friction, flags claims needing evidence, predicts likely reader questions, recommends concrete changes, and returns a fact-preserving rewrite. Requires $0.50 via x402 on Base.

Input parameters:

- `constraints` (array): Optional factual, legal, brand, or wording constraints that the review and rewrite must preserve.
- `content` (string, required): Launch or marketing copy to review before publication, such as a landing page, product announcement, changelog, pricing page, app-store listing, or email.
- `contentType` (string): Kind of copy being reviewed; use other when none of the listed categories fit.
- `desiredAction` (string): Optional action the copy should persuade the reader to take, such as sign up, start a trial, buy, upgrade, or learn more.
- `idempotencyKey` (string, required): Stable key for this logical ReactionCheck request. Reuse it only when retrying the exact same input.
- `productContext` (string): Optional context about the product, feature, offer, or company needed to judge positioning, clarity, and factual fit.
- `targetAudience` (string): Optional intended audience or buyer segment whose likely reaction should inform the review.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402#diagnostics

## Score history

- 2026-08-20: 67
- 2026-08-19: 66
- 2026-08-18: 66
- 2026-08-17: 65
- 2026-08-16: 65
- 2026-08-15: 64

## Links

- Remote endpoint: https://launchcheck-x402.fly.dev/mcp
- Website: https://launchcheck-x402.fly.dev/docs
- Changelog RSS feed: https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402.xml
- Changelog JSON feed: https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402.json
- HTML version of this page: https://verifymcp.io/servers/apolito53-launchcheck-x402/launchcheck-x402