# `io.github.foxxx009/x402-tools-mcp` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/io.github.foxxx009/x402-tools-mcp
- JSON: https://anlyon.dev/api/v1/servers/io.github.foxxx009/x402-tools-mcp
- Version: 1.1.0 (active)
- Publisher: io.github.foxxx009 (GitHub account)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Repository: https://github.com/foxxx009/x402-tools-mcp
- Metadata from the official MCP Registry, synced 2026-10-21T18:34:13.446Z

Title and description, as the publisher wrote them:

```untrusted-server-text
x402 Tools
Pay-per-call research tools for AI agents, paid via x402 USDC. Remote MCP, one free tool.
```

Scanned 2026-10-21T19:22:48.266Z over streamable-http.

**13 tools: 1 do something that can't be undone, 10 change things and 2 only read.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 1 | ask |
| Changes things | write | 10 | ask |
| Only reads | read | 2 | allow |

## Exfil surface

No private-data -> untrusted-input -> outbound path in this server alone: no tool is tagged private-data.

| Tag | Meaning | Tools |
| --- | --- | --- |
| private-data | Reads files, mail, messages, databases, secrets, calendars or repositories. | none |
| untrusted-input | Brings in text someone else can write: web pages, inbound email, messages, issues and comments. | `mcp__x402-tools__web_fetch` |
| outbound | Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL. | `mcp__x402-tools__exchange_rates` `mcp__x402-tools__free_url_check` `mcp__x402-tools__web_brief` `mcp__x402-tools__web_fetch` |

## Findings

No check matched anything in these tool definitions.


## Can't be undone (1)

Sends, pays, publishes or merges: once done, it cannot be taken back. Claude Code: ask.

### `exchange_rates`

- The input addresses people (input.to): what it sends cannot be taken back.
- Tag outbound: The input takes a destination (input.to): what the tool writes goes there.

Description, as the server wrote it:

```untrusted-server-text
$0.002 per call — Live fiat exchange rates (open.er-api.com, no key, ~200 currencies). Params: base = ISO code (default USD); to = comma list or single code (default EUR,GBP,JPY,CNY). Returns rates and the last-update timestamp.
```

## Changes things (10)

Creates or changes something that can be changed back. Claude Code: ask.

### `domain_intel`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.005 per call — Domain due-diligence bundle: RDAP registrar + creation/expiry dates + status, DNS records (A/MX/NS/TXT), and Certificate Transparency history via crt.sh. Use to vet a domain before trusting or linking to it.
```

### `fda_recalls`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.02 per call — FDA recall enforcement reports from open.fda.gov (no key, rate-limited). Params: type = food|drug|device (default food); reason = free-text filter; limit = max records (default 10). Returns recall reason, status, date and product description for each match.
```

### `free_url_check`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag outbound: The input takes a URL (input.url): a request to a URL can carry data to whoever runs it.

Description, as the server wrote it:

```untrusted-server-text
FREE — FREE: check whether a public URL is reachable and what it is. Returns HTTP status, final URL after redirects, content type and page title. Use web_fetch (paid) for full text and links.
```

### `github_repo`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.005 per call — GitHub repo snapshot: stars, forks, open-issue count, watchers, primary language, SPDX license, created/pushed dates and latest release tag. Use to triage a repo before contributing or depending on it.
```

### `open_meteo_weather`

- The name "open_meteo_weather" says "open": a word for a change.

Description, as the server wrote it:

```untrusted-server-text
$0.002 per call — Current weather from Open-Meteo (no API key, no signup). Given lat/lon returns temperature (C), apparent temperature, humidity, wind speed, precipitation and a WMO weather code. Params: lat, lon (required).
```

### `repo_diligence`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.03 per call — Deep GitHub repo due-diligence: base snapshot + last 5 commits (author/date/message), contributor count, archived flag, security-policy presence, latest release cadence and open/closed issue ratio. Use to decide whether to depend on or contribute to a repo before trusting it.
```

### `stock_quote`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.01 per call — Real-time stock quotes: price, change, change percent, open, high, low, volume, turnover, currency and exchange timestamp. Covers A-shares (sh600000, sz000001), Hong Kong (hk00700) and US (usAAPL or plain AAPL). Accepts several symbols at once separated by commas. No API key needed, sourced from Tencent qt.gtimg.cn with a Nasdaq fallback for US tickers.
```

### `token_intel`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.005 per call — Base ERC-20 due-diligence: on-chain name, symbol, decimals and total supply via eth_call. Use to sanity-check a Base token address before interacting with it.
```

### `usgs_earthquakes`

- Nothing in its name or description says what it does, so it is counted as a write.

Description, as the server wrote it:

```untrusted-server-text
$0.002 per call — Recent earthquakes from the USGS GeoJSON feed (no API key). Returns magnitude, place, time, depth and coordinates for each event. Params: period = hour|day|week (default day); minmag = minimum magnitude (default 0); limit = max events (default 20).
```

### `web_brief`

- Nothing in its name or description says what it does, so it is counted as a write.
- Tag outbound: The input takes a URL (input.urls): a request to a URL can carry data to whoever runs it.

Description, as the server wrote it:

```untrusted-server-text
$0.02 per call — Multi-source research brief from 1–3 URLs. For each source extract title, meta description, key sentences (numbered/quoted/date-or-figure-bearing) and outbound links. Returns a structured, citable brief other agents can consume without their own web access.
```

## Only reads (2)

Looks things up and changes nothing. Claude Code: allow.

### `sec_edgar_search`

- The name "sec_edgar_search" says "search": a word for reading.

Description, as the server wrote it:

```untrusted-server-text
$0.02 per call — SEC EDGAR full-text search (efts.sec.gov, no key). Find filings by term. Params: q = search term (required); forms = comma list e.g. 10-K,8-K; limit = max hits (default 10). Returns filing date, company, CIK and accession number for each hit.
```

### `web_fetch`

- The name "web_fetch" says "fetch": a word for reading.
- Tag untrusted-input: The name "web_fetch" says "fetch" and "web": it reads web pages, which anyone can write. The description's first sentence says "url": it reads web pages, which anyone can write. The input takes a URL (input.url), and the tool reads it: it reads web pages, which anyone can write.
- Tag outbound: The input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
- Claude Code: ask, because it is tagged outbound.

Description, as the server wrote it:

```untrusted-server-text
$0.005 per call — Fetch a public URL and return status, final URL, title, cleaned text (scripts/styles stripped, truncated) and the top 20 absolute links. Useful when an agent itself cannot reach the open web.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `x402-tools`:

```json
{
  "permissions": {
    "allow": [
      "mcp__x402-tools__sec_edgar_search"
    ],
    "ask": [
      "mcp__x402-tools__web_fetch",
      "mcp__x402-tools__domain_intel",
      "mcp__x402-tools__github_repo",
      "mcp__x402-tools__token_intel",
      "mcp__x402-tools__repo_diligence",
      "mcp__x402-tools__web_brief",
      "mcp__x402-tools__stock_quote",
      "mcp__x402-tools__free_url_check",
      "mcp__x402-tools__usgs_earthquakes",
      "mcp__x402-tools__open_meteo_weather",
      "mcp__x402-tools__exchange_rates",
      "mcp__x402-tools__fda_recalls"
    ],
    "deny": []
  }
}
```

Capability tags behind the rules (a read tagged outbound is asked about):

- `mcp__x402-tools__web_fetch`: untrusted-input, outbound
- `mcp__x402-tools__web_brief`: outbound
- `mcp__x402-tools__free_url_check`: outbound
- `mcp__x402-tools__exchange_rates`: outbound