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 BankrBot/claude-plugins --skill sdk-transaction-buildergit clone --depth 1 https://github.com/BankrBot/claude-pluginsWrote 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/bankrbot/claude-plugins/sdk-transaction-builder)<a href="https://agentmods.dev/skills/bankrbot/claude-plugins/sdk-transaction-builder"><img src="https://agentmods.dev/badge/skills/bankrbot/claude-plugins/sdk-transaction-builder.svg" alt="Measured on agentmods" 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 | $0.00106 | $0.00840 |
| Opus 5 | $0.00053 | $0.00420 |
| Sonnet 5 | $0.00021 | $0.00168 |
| Haiku 4.5 | $0.00011 | $0.00084 |
Grade A, and why
Bankr x402 SDK - Transaction Builder 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 8d 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 — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SDK Transaction Builder
Build blockchain transactions for transfers, NFTs, bridges, and DeFi operations.
Transaction Types
| Type | Description | Example Prompt |
|---|---|---|
transfer_erc20 |
Send ERC20 tokens | "Send 100 USDC to 0x..." |
transfer_eth |
Send native ETH | "Send 0.1 ETH to 0x..." |
convert_eth_to_weth |
Wrap ETH | "Wrap 0.5 ETH" |
convert_weth_to_eth |
Unwrap WETH | "Unwrap 1 WETH" |
transfer_nft |
Send NFT | "Transfer my NFT #123 to 0x..." |
buy_nft |
Purchase NFT | "Buy the cheapest Pudgy Penguin" |
mint_manifold_nft |
Mint from Manifold | "Mint from Manifold at 0x..." |
mint_seadrop_nft |
Mint from SeaDrop | "Mint from SeaDrop at 0x..." |
swapCrossChain |
Bridge tokens | "Bridge 100 USDC from Ethereum to Base" |
Prompt Patterns
# Transfers
"Send 100 USDC to 0x742d35..."
"Transfer 0.5 ETH to vitalik.eth"
"Send 50 USDC to 0x123... on Base"
# ETH/WETH
"Wrap 0.5 ETH to WETH"
"Unwrap 1 WETH to ETH"
# NFTs
"Transfer my Pudgy Penguin #1234 to 0x..."
"Buy the cheapest Pudgy Penguin on OpenSea"
"Mint NFT from Manifold contract 0x..."
# Cross-Chain
"Bridge 100 USDC from Ethereum to Base"
"Move 0.5 ETH from Base to Ethereum"
Usage
import { BankrClient } from "@bankr/sdk";
const client = new BankrClient({
privateKey: process.env.BANKR_PRIVATE_KEY as `0x${string}`,
});
// Transfer tokens
const result = await client.promptAndWait({
prompt: "Send 100 USDC to 0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
});
if (result.status === "completed" && result.transactions) {
const tx = result.transactions[0].metadata.transaction;
await wallet.sendTransaction(tx);
}
Transaction Metadata
All transactions include metadata for verification:
const tx = result.transactions[0];
const meta = tx.metadata.__ORIGINAL_TX_DATA__;
console.log(`Chain: ${meta.chain}`);
console.log(`Amount: ${meta.inputTokenAmount} ${meta.inputTokenTicker}`);
console.log(`To: ${meta.receiver}`);
console.log(`Message: ${meta.humanReadableMessage}`);
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.
- 8d ago First seen · 96 lines · 106 tokens per session scan A f45f4d88b1b0
Bankr x402 SDK - Transaction Builder is a skill published in the GitHub repository BankrBot/claude-plugins (85 stars, last pushed 5mo ago), licensed MIT. It adds 106 tokens to every session and 840 once invoked, about $0.0005 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 2026-08-30.
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