CryptoToolBox Agent Toolkit

What's inside (34 tools)

• Web3 / crypto (8) — web3_balance, web3_token_info, web3_tx_decode, web3_ens_resolve, web3_ens_reverse, web3_chain_status, web3_price, web3_verify_payment. Live on-chain reads via free public RPCs — no API key.
• Crypto address validation (3) — BTC / ETH / SOL format + checksum checks.
• Encoding & hashing, dates, strings, CSV/JSON, randomness — base64, hex, url, sha256/sha1/md5, json format/minify/validate/diff, epoch, case, slug, reverse, word count, csv↔json, random string/int/uuid.
• Premium (1) — ai_text_analyze, pay-per-call.

The Web3 tools are the reason this server exists: those calls aren't one-liners, and agents building payments / x402 / wallet features need them. The commerce layer — web3_price (Chainlink spot price) and web3_verify_payment (confirm an inbound payment landed) — is the close-loop an agent needs to actually get paid and verify it.

Connect it (stdio)

One-line install — no publish, no API key:

npx -y github:irun2themoney/crypto-toolbox-mcp

Or pin it in your client config:

{
  "mcpServers": {
    "cryptotoolbox": {
      "command": "npx",
      "args": ["-y", "github:irun2themoney/crypto-toolbox-mcp"]
    }
  }
}

ElizaOS agents: install the plugin @elizaos/plugin-crypto-toolbox — github.com/irun2themoney/crypto-toolbox-eliza.

Tools it exposes

• base64 encode/decode
• hex encode/decode
• url encode/decode
• sha256 / sha1 / md5
• json format / minify / validate / diff
• epoch ↔ date
• case convert
• slugify
• reverse
• word count
• csv ↔ json
• random string / int / uuid
• btc / eth / sol address validation
• tip_info

Free vs Premium

All 33 free tools and the Web3 suite are free. One premium tool, ai_text_analyze, performs deep writing-quality analysis (Flesch reading ease, reading grade, passive-voice hits, long-word ratio) and is gated by on-chain payment proof — verified directly against the chain via free public RPCs, no backend, no accounts.

Call the premium tool with payment_chain + payment_txhash. The server checks the transaction on-chain (recipient + amount) before running. No API key, no signup — pay, paste txhash, get result.

Gratis vs Pro

This toolkit earns only when agents or their builders find it worth paying for. Tips are always optional; the premium is optional. Both route to the same self-custody wallets below.