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 paritytech/polkadot-apps --skill polkadot-transactionsgit clone --depth 1 https://github.com/paritytech/polkadot-appsWrote 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/paritytech/polkadot-apps/polkadot-transactions)<a href="https://agentmods.dev/skills/paritytech/polkadot-apps/polkadot-transactions"><img src="https://agentmods.dev/badge/skills/paritytech/polkadot-apps/polkadot-transactions/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/paritytech/polkadot-apps/polkadot-transactions"><img src="https://agentmods.dev/badge/skills/paritytech/polkadot-apps/polkadot-transactions.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 | $0.00128 | $0.03984 |
| Opus 5.5 | $0.00051 | $0.01594 |
| Sonnet 5.5 | $0.00026 | $0.00797 |
| Haiku 4.5 | $0.00013 | $0.00398 |
Grade A, and why
polkadot-transactions 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 2mo ago.
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 — 403 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Polkadot Transactions, Signing, and Key Management
This skill covers three packages that work together for submitting on-chain transactions:
| Package | Import | Purpose |
|---|---|---|
| tx | @polkadot-apps/tx |
Submit, watch, retry transactions |
| signer | @polkadot-apps/signer |
Manage signing accounts across providers |
| keys | @polkadot-apps/keys |
Derive keys, accounts, and session keys |
Quick Start: Submit a Transaction in 10 Lines
import { createDevSigner, submitAndWatch } from "@polkadot-apps/tx";
import type { TxStatus, TxResult } from "@polkadot-apps/tx";
// 1. Get a signer (dev signer for testnet)
const alice = createDevSigner("Alice");
// 2. Build a transaction (from PAPI typed API)
// Note: `dest` is a MultiAddress enum — pass as { type: "Id", value: ss58Address }
const tx = api.tx.Balances.transfer_keep_alive({
dest: { type: "Id", value: recipientAddress },
value: 1_000_000_000_000n,
});
// 3. Submit and watch
const result = await submitAndWatch(tx, alice);
// result: { txHash, ok, block: { hash, number, index }, events, dispatchError? }
console.log(result.ok ? "Success" : "Failed", result.block.hash);
WARNING: Dev signers (
createDevSigner) use well-known private keys. They are for local development and testnets ONLY. Never use in production.
Three Distinct Signer Types
WARNING: Three different signer-related types exist in this codebase. Do not confuse them.
| Type | Package | What It Is |
|---|---|---|
PolkadotSigner |
polkadot-api |
Low-level signer passed to submitAndWatch(). Signs extrinsics. |
SignerAccount |
@polkadot-apps/signer |
Account wrapper with address, publicKey, source, and getSigner() that returns a PolkadotSigner. |
SignerManager |
@polkadot-apps/signer |
Orchestrator that discovers accounts from multiple providers and manages selection state. |
How they connect:
SignerManager.connect() -> SignerAccount[] -> account.getSigner() -> PolkadotSigner -> submitAndWatch(tx, signer)
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2mo ago First seen · 403 lines · 128 tokens per session scan A 7e43444f938f
polkadot-transactions is a skill published in the GitHub repository paritytech/polkadot-apps (2 stars, last pushed 3d ago), licensed Apache-2.0. It adds 128 tokens to every session and 3,984 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-08-31.
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