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Cryptominium

by cryptominium.com · remote · no sign-in to list tools · v1.0.1 · published by com.cryptominium

What a crypto position would really sell for: measured exit costs, address and transaction lookups.

Changes · 6
CompareRegistry entry

8 tools: 6 change things and 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 cryptominium https://cryptominium.com/mcp

Tools

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

8 tools

Changes things 6Claude Code: ask
  • coin_profileThe Cryptominium Profile (CM Profile) of a tracked coin, in four fixed groups: what Cryptominium has established (contracts matched, chains), what it has measured (the cost of sell…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The Cryptominium Profile (CM Profile) of a tracked coin, in four fixed groups: what Cryptominium has established (contracts matched, chains), what it has measured (the cost of selling on-chain and on exchange order books, with dates; price history), what it has written with sources (what the coin can do and through which company), and what it has not established. Use this when someone asks what is known about a coin, how well documented it is, or whether it depends on a company. Each line links to its evidence. Also returns this week's changes as short tags and the 7-day high, low and latest price, as the coin page chart marks them. A record, not a rating: it is not a view on whether to hold the coin.

    Annotations the server declares

    • title: CM Profile
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • exit_costCryptominium measures, every day, what a fixed-size sell of each tracked token actually returns versus its quoted price, by querying live DEX routing on Base, Ethereum and BNB Chai…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Cryptominium measures, every day, what a fixed-size sell of each tracked token actually returns versus its quoted price, by querying live DEX routing on Base, Ethereum and BNB Chain. Use this when someone asks whether a token can really be sold, how liquid it is, or what they would get for a position. Returns the latest measured exit friction (% lost to price impact), the dollars received, the date measured, and a citation — plus, where the token trades on Kraken or Coinbase, what the same sell loses against those order books, and this week's changes as short tags with the 7-day high, low and latest price. Not a price feed and not advice.

    Annotations the server declares

    • title: Exit cost
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • exit_indexThe Cryptominium Exit-Friction Index: each month, the median share of value lost when selling a fixed $100,000 position across every token with a live on-chain market, with quartil…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    The Cryptominium Exit-Friction Index: each month, the median share of value lost when selling a fixed $100,000 position across every token with a live on-chain market, with quartiles and the share of tokens losing more than half. Use for questions about overall crypto market liquidity or how hard it is to exit altcoins. Optional month as YYYY-MM; defaults to the latest.

    Annotations the server declares

    • title: Exit-Friction Index
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • identify_addressIdentifies a public address or ENS name without being told what it is: wallet or contract, which of seven EVM chains it has been active on (read: Base, Ethereum, BNB Chain; identif…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Identifies a public address or ENS name without being told what it is: wallet or contract, which of seven EVM chains it has been active on (read: Base, Ethereum, BNB Chain; identified: Arbitrum, Polygon, Optimism, Avalanche), EIP-7702 delegation, the token if it is one Cryptominium tracks. Bitcoin addresses are checksum-verified and read; Solana accounts are identified (wallet, mint, token account, program). The address is not stored. A recovery phrase or private key is refused without being looked up.

    Annotations the server declares

    • title: Identify address
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • powermapCryptominium's PowerMap: which company or group holds which of nine powers over a coin (freeze, pause, mint, redeem, custody, govern, validate, pay out, bridge), each repeating tha…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Cryptominium's PowerMap: which company or group holds which of nine powers over a coin (freeze, pause, mint, redeem, custody, govern, validate, pay out, bridge), each repeating that party's own terms with a link and a date, plus on-chain readings of mint and freeze authority. Answers questions about a coin ("USDC"), a company ("Circle"), or a class of coins ("which stablecoins can be frozen"), and says what is not established. It records who can use a power, not whether they will.

    Annotations the server declares

    • title: PowerMap
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • what_isCryptominium's hand-written crypto library: what a crypto, blockchain, trading or crypto-technology term means in plain English, what it means in practice for someone holding or se…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Cryptominium's hand-written crypto library: what a crypto, blockchain, trading or crypto-technology term means in plain English, what it means in practice for someone holding or sending crypto, how it works, a common misconception, and the primary source it was checked against with the date. For ideas such as "code is law" or "sound money", the strongest case for and against, each sourced. Accepts a term ("impermanent loss"), a question ("what is an NFT"), two terms to contrast ("proof of work vs proof of stake") or a topic ("defi terms"). Written ahead of time, not generated.

    Annotations the server declares

    • title: What is
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Only reads 2Claude Code: allow
  • explain_transactionReads an EVM transaction hash on Base, Ethereum or BNB Chain from its receipt logs: whether it succeeded, what moved to and from whom (with token symbols and decimals), what it cos…No findings

    Why it is in this group

    • The name "explain_transaction" says "explain": a word for reading.
    Description, as the server wrote it
    Reads an EVM transaction hash on Base, Ethereum or BNB Chain from its receipt logs: whether it succeeded, what moved to and from whom (with token symbols and decimals), what it cost in fees, and any token approvals it granted or revoked, including unlimited ones. The hash is not stored.

    Annotations the server declares

    • title: Explain transaction
    • readOnlyHint: true
    • destructiveHint: false
    • 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.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http cryptominium https://cryptominium.com/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cryptominium__explain_transaction",
      "mcp__cryptominium__search"
    ],
    "ask": [
      "mcp__cryptominium__exit_cost",
      "mcp__cryptominium__coin_profile",
      "mcp__cryptominium__powermap",
      "mcp__cryptominium__exit_index",
      "mcp__cryptominium__identify_address",
      "mcp__cryptominium__what_is"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cryptominium. Review it before you use it.