# Preflight SafeSwap (remote · preflight-agent.netlify.app)

Safe Solana swaps for AI agents with risk checks, unsigned transactions, x402, and 3-bp fees.

- Trust score: 65/100 (medium)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- remote · `preflight-agent.netlify.app`: 65/100 (this document), [markdown](https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent.md), [page](https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent)

## Channel facts

- Endpoint: `https://preflight-agent.netlify.app/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 2026-09-20.

- **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**: 74/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 115 tokens (~115/item across 1 items; 1 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability check failed: schema churn in the 19 days we've observed: 2 tool removals, 0 breaking changes, 0 auth/transport breaks, 1 additions.
- **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.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 1 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Preflight SafeSwap MCP server?

Preflight SafeSwap is a hosted endpoint at https://preflight-agent.netlify.app/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.

### Claude

```bash
claude mcp add --transport http mr8-gif-preflight-safe-swap 'https://preflight-agent.netlify.app/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "mr8-gif-preflight-safe-swap": {
      "url": "https://preflight-agent.netlify.app/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "mr8-gif-preflight-safe-swap": {
      "type": "http",
      "url": "https://preflight-agent.netlify.app/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.mr8-gif-preflight-safe-swap]
url = "https://preflight-agent.netlify.app/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mr8-gif-preflight-safe-swap": {
      "type": "remote",
      "url": "https://preflight-agent.netlify.app/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add mr8-gif-preflight-safe-swap --url 'https://preflight-agent.netlify.app/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  mr8-gif-preflight-safe-swap:
    url: "https://preflight-agent.netlify.app/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "mr8-gif-preflight-safe-swap": {
      "Transport": "http",
      "Url": "https://preflight-agent.netlify.app/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add mr8-gif-preflight-safe-swap -t streamable-http -u 'https://preflight-agent.netlify.app/mcp'
```

### Other

```json
{
  "mcpServers": {
    "mr8-gif-preflight-safe-swap": {
      "type": "http",
      "url": "https://preflight-agent.netlify.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.

### 2026-09-12 (score 65, −5)

- [security regression] Stability: 0.33 → fail
- [security regression] Tool “preflight_capabilities” was removed
- [security regression] Tool “preflight_safe_swap” was removed
- [security] The server changed its declared name: Preflight SafeSwap → preflight-financial-action-firewall
- [functional regression] Schema quality: 95 → 115
- [functional regression] MCP protocol: pass → fail
- [functional improvement] Tool coverage: 83% → 100%
- [functional] MCP protocol version: 2026-07-28 → 2025-06-18
- [functional] Server version: 1.0.0 → 3.0.0
- [functional] New tool “preflight_transaction”

### 2026-09-11 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-06 (score 68, +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.

### 2026-09-04 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-02 (score 66, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-01 (score 65)

First indexed and scored.

## MCP tools (1)

### `preflight_transaction` (~115 tokens)

Read-only Solana financial-action firewall. Compare an unsigned transaction's simulated effects with declared intent and principal policy. Returns PASS, FAIL, or REVIEW plus a signed verification receipt.

Input parameters:

- `intent` (object, required): Declared action, assets, amountAtomic, recipient, and protocol intent.
- `policy` (object, required): Principal policy: allowedPrograms, allowedAccounts, maxSpendAtomic, maxFeeAtomic, and strictness.
- `unsignedTransaction` (string, required): Base64 legacy or v0 Solana transaction. Preflight never signs it.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent#diagnostics

## Score history

- 2026-09-20: 65
- 2026-09-19: 65
- 2026-09-18: 65
- 2026-09-17: 65
- 2026-09-16: 65
- 2026-09-15: 65
- 2026-09-14: 65
- 2026-09-13: 65
- 2026-09-12: 65
- 2026-09-11: 70
- 2026-09-10: 69
- 2026-09-09: 69
- 2026-09-08: 68
- 2026-09-07: 68
- 2026-09-06: 68
- 2026-09-05: 67
- 2026-09-04: 67
- 2026-09-03: 66
- 2026-09-02: 66
- 2026-09-01: 65

## Common questions

### What is the Preflight SafeSwap MCP server?

Preflight SafeSwap is an MCP server listed in the public MCP registry as io.github.mr8-gif/preflight-safe-swap. Safe Solana swaps for AI agents with risk checks, unsigned transactions, x402, and 3-bp fees. This page covers its hosted endpoint (https://preflight-agent.netlify.app/mcp).

### Is the Preflight SafeSwap MCP server safe to use?

Preflight SafeSwap scores 65 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 Preflight SafeSwap MCP server expose?

Preflight SafeSwap exposes 1 tool: preflight_transaction. Their descriptions and schemas cost roughly 115 tokens of context every time the server is loaded.

### Does the Preflight SafeSwap MCP server require authentication?

No. We connected to Preflight SafeSwap without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Preflight SafeSwap MCP server still maintained?

Preflight SafeSwap 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.

## Links

- Remote endpoint: https://preflight-agent.netlify.app/mcp
- Website: https://preflight-agent.netlify.app/
- Changelog RSS feed: https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent.xml
- Changelog JSON feed: https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent.json
- HTML version of this page: https://verifymcp.io/servers/mr8-gif-preflight-safe-swap/preflight-agent