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Altscan explorers

by altscan.io · remote · no sign-in to list tools · v0.1.0 · published by io.altscan

Keyless, read-only BNB Chain and Ethereum data: transactions by hash, tokens with a lookalike check

Read only
CompareRegistry entry

2 tools: 2 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http explorers https://altscan.io/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Only reads 2Claude Code: allow
  • get_tokenA BNB Chain or Ethereum token contract: name, symbol, decimals, total supply, indexed holder count, and `lookalike`: the well-known token (e.g.Reads text others writeNo findings

    Why it is in this group

    • The name "get_token" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    A BNB Chain or Ethereum token contract: name, symbol, decimals, total supply, indexed holder count, and `lookalike`: the well-known token (e.g. USDT) whose name or symbol it imitates, with that token's real contract. `lookalike: null` only means no match against a short list of well-known tokens; it is not a safety verdict.

    Annotations the server declares

    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true
  • get_transactionOne BNB Chain or Ethereum transaction by hash: from, to, value (wei), gas, status.Reads text others writeNo findings

    Why it is in this group

    • The name "get_transaction" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    One BNB Chain or Ethereum transaction by hash: from, to, value (wei), gas, status. Recent transactions come from the explorer index; older ones are read from the chain (`source` says which). `pending: true` means no receipt yet, and fields the node did not report are null. Logs and decoded calls are not included.

    Annotations the server declares

    • readOnlyHint: true
    • idempotentHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

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

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write2
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http explorers https://altscan.io/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__explorers__get_transaction",
      "mcp__explorers__get_token"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as explorers. Review it before you use it.

Capability tags behind 2 rules
  • mcp__explorers__get_transaction untrusted-input
  • mcp__explorers__get_token untrusted-input