sign-swap

sign-swap is a skill for Claude Code from agenticvault/agentic-vault. It costs 0 tokens per session (205 once invoked), scanned A, original, MIT.

A procedure for signing a token-swap transaction through the Agentic Vault MCP server. A token swap exchanges one blockchain asset for another through a decentralised exchange, or DEX.

In plain words
What is it for?
Signing approved swap transactions on supported EVM-compatible blockchain networks using a DEX router address and encoded transaction data.
Why use it?
It keeps signing inside the vault and applies checks for the blockchain, contract, function, and transaction value before signing.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the agentic-vault plugin — 5 skills, 1 MCP server shipped together

Good fit Signing approved swap transactions on supported EVM-compatible blockchain networks using a DEX router address and encoded transaction data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/agenticvault/agentic-vault/sign-swap
Install

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.

Any agent
npx skills add agenticvault/agentic-vault --skill sign-swap
Clone the repo
git clone --depth 1 https://github.com/agenticvault/agentic-vault

Made for: Claude Code.

Or install agentic-vault, the plugin that ships this one along with the rest of its 5 skills, 1 MCP server.

Wrote 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.

agentmods badge for sign-swap

README.md
[![agentmods](https://agentmods.dev/badge/skills/agenticvault/agentic-vault/sign-swap/github.svg)](https://agentmods.dev/skills/agenticvault/agentic-vault/sign-swap)
Your own site
<a href="https://agentmods.dev/skills/agenticvault/agentic-vault/sign-swap"><img src="https://agentmods.dev/badge/skills/agenticvault/agentic-vault/sign-swap/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.

agentmods 80×15 button for sign-swap

Your own site · 80×15
<a href="https://agentmods.dev/skills/agenticvault/agentic-vault/sign-swap"><img src="https://agentmods.dev/badge/skills/agenticvault/agentic-vault/sign-swap.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 205 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00205
Opus 5 $0.00000 $0.00102
Sonnet 5 $0.00000 $0.00041
Haiku 4.5 $0.00000 $0.00020

Measured 9d ago against content hash 101e1b3bdc7c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

sign-swap 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 9d 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.

skills/sign-swap/SKILL.md · 30 lines

What it actually says

Sign Swap

Sign a swap transaction through the Agentic Vault MCP server.

When to use

Use this skill when the user wants to sign a token swap transaction on a supported chain.

Instructions

  1. Use the sign_swap MCP tool with the following parameters:

    • chainId: The target chain ID (e.g., 1 for Ethereum mainnet)
    • to: The DEX router contract address
    • data: The encoded swap calldata
    • value: (Optional) ETH value in wei
  2. The tool enforces policy constraints:

    • Chain ID must be whitelisted
    • Contract must be whitelisted
    • Function selector must be whitelisted
    • Transaction value must be within limits
  3. Never import or access signing keys directly. Always use the MCP tool.

Example

Use the sign_swap tool to sign a swap on chain 1 to router 0x... with calldata 0x...
Changes

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.

  1. 9d ago First seen · 30 lines · 0 tokens per session scan A 101e1b3bdc7c

Subscribe to this mod's changes

sign-swap is a skill published in the GitHub repository agenticvault/agentic-vault (4 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 205 tokens. 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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