Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add lidonation/Cardano-mcp --skill tx-safetygit clone --depth 1 https://github.com/lidonation/Cardano-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lidonation/cardano-mcp/tx-safety)<a href="https://agentmods.dev/skills/lidonation/cardano-mcp/tx-safety"><img src="https://agentmods.dev/badge/skills/lidonation/cardano-mcp/tx-safety/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/lidonation/cardano-mcp/tx-safety"><img src="https://agentmods.dev/badge/skills/lidonation/cardano-mcp/tx-safety.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00050 | $0.00657 |
| Opus 5 | $0.00025 | $0.00329 |
| Sonnet 5 | $0.00010 | $0.00131 |
| Haiku 4.5 | $0.00005 | $0.00066 |
Grade A, and why
tx-safety scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Transaction safety guardrail
submit_transaction broadcasts a signed transaction to the real network.
Nothing about the tool itself stops it from running against mainnet with the
wrong amount, the wrong recipient, or while the user believed they were on a
testnet. Once a transaction lands on-chain it cannot be undone. Treat every
call to submit_transaction — and the build_* calls that precede it — as
irreversible until proven otherwise.
Workflow
- Before building any transaction, call
get_network_info. Do not assume the network from context, prior conversation, or what the user "probably" meant. - State the active network out loud to the user before proceeding, plainly —
not buried in a JSON blob. If
is_mainnetis true, say so explicitly: this transaction will move real ADA/assets. - After building a transaction (
build_payment_txorbuild_smart_contract_tx), before callingsubmit_transaction, restate to the user in plain language: the network, the sender, the recipient, the exact amount (in ADA, not just lovelace), and any native assets. This restatement must happen even if the user already stated these values earlier in the conversation — confirm what the built transaction actually contains, not what was requested. - Get an explicit go-ahead from the user in the current turn before calling
submit_transaction— a prior "yes, build it" is not the same as confirmation to submit. If the user has not responded to the restatement yet, stop and wait; do not callsubmit_transactionspeculatively. - If
get_network_inforeports mainnet and the user has not clearly indicated they intend to use mainnet (e.g. they only ever mentioned "testnet" or "preprod"), flag the mismatch and ask before continuing rather than proceeding on the assumption they meant mainnet.
Why this exists
The eUTxO model has no reversible "undo" — a submitted transaction is final
once confirmed, and a testnet/mainnet mix-up or a mistyped amount has real
financial consequences. A model's confidence that it has the right sender,
recipient, and network is not the same as verifying it — this skill forces
that verification through get_network_info and an explicit human
confirmation step, the same way aiken-verify forces compiler verification
before showing Aiken code as correct.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- today First seen · 48 lines · 50 tokens per session scan A 4fe042e621b8
tx-safety is a skill published in the GitHub repository lidonation/Cardano-mcp (2 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session and 657 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-21.
Other skills, from other repositories
bridge
Cross-chain token transfers using Wormhole and CCTP.
hyperliquid
Hyperliquid L1 perps DEX (69% market share).
marginfi
MarginFi — Solana lending and borrowing.
mpp-agent
Pay HTTP 402 APIs via Machine Payments Protocol (MPP).
token-pick
One token recommendation and one prediction market pick - scored, quantified, with a skip branch when signals are weak.
crypto-market-rank
Crypto market rankings and leaderboards. Query trending tokens, top searched tokens, Binance Alpha tokens, tokenized stocks, social hype sentiment ranks, smart money inflow token rankings, top meme token rankings from Pulse launchpad, and top trader PnL leaderboards. Use this skill when users ask about token rankings…