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Tokenbooks - crypto and fiat accounting and payments
io.tokenbooks/tokenbooks in the official MCP registry.
Endpoint https://api.tokenbooks.io/mcp.
The registry describes it as: Crypto and fiat on one double-entry ledger: sync wallets, reconcile, cost basis, audit-ready close.
We read its 36 tools on 2026-10-22. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
get_server_info get_accounting_reference list_workspaces list_portfolios get_portfolio get_portfolio_balances list_accounting_rules edit_accounting_rules apply_accounting_rules list_wallets list_journal_line_assignment_options edit_transaction import_adjustment_journals get_sync_status incremental_sync full_resync list_portfolio_transactions list_raw_transactions get_filter_options get_portfolio_issue_summary confirm_transaction reprocess_transaction preview_transaction_classification merge_transactions split_transactions mark_token_spam simulate_fiat_quote get_journal_entry get_lot_ledger request_report_export get_request_status add_wallet create_portfolio get_asset_position list_chains get_help
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-tokenbooks-tokenbooks)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.