What is moonpay-swap-tokens?

A command-line setup for exchanging one token for another on the same blockchain, or moving tokens between different blockchains. It prepares the transaction, signs it locally, sends it, and tracks it.

Use it to swap tokens such as SOL for USDC on Solana, bridge tokens between chains, or request an exact amount of the token you want to receive.

It brings token swaps and cross-blockchain transfers into two command-line workflows instead of requiring separate manual steps.

moonpay-swap-tokens — Skill for Claude Code by moonpay

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 moonpay/skills --skill moonpay-swap-tokens

Clone the repo

git clone --depth 1 https://github.com/moonpay/skills

Made for: Claude Code.

Or install moonpay-skills, the plugin that ships this one along with the rest of its 23 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/moonpay/skills/moonpay-swap-tokens/github.svg)](https://agentmods.dev/skills/moonpay/skills/moonpay-swap-tokens)

Your own site

<a href="https://agentmods.dev/skills/moonpay/skills/moonpay-swap-tokens"><img src="https://agentmods.dev/badge/skills/moonpay/skills/moonpay-swap-tokens/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/moonpay/skills/moonpay-swap-tokens"><img src="https://agentmods.dev/badge/skills/moonpay/skills/moonpay-swap-tokens.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 858 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.

Model	Per session	Once invoked
Fable 5.1	$0.00033	$0.00858
Opus 5	$0.00016	$0.00429
Sonnet 5	$0.00007	$0.00172
Haiku 4.5	$0.00003	$0.00086

Measured 11d ago against content hash 38b1ce5aff85, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

moonpay-swap-tokens 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 11d 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/moonpay-swap-tokens/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Swap or bridge tokens

Goal

Swap tokens on the same chain, or bridge tokens across chains. Two commands:

mp token swap — same chain, different tokens
mp token bridge — cross chain

Both build via swaps.xyz, sign locally, broadcast, and register for tracking.

Commands

Swap (same chain)

mp token swap \
  --wallet <wallet-name> \
  --chain <chain> \
  --from-token <token-address> \
  --from-amount <amount> \
  --to-token <token-address>

Supports exact-out: use --to-amount instead of --from-amount.

Bridge (cross chain)

mp token bridge \
  --from-wallet <wallet-name> \
  --from-chain <chain> \
  --from-token <token-address> \
  --from-amount <amount> \
  --to-chain <chain> \
  --to-token <token-address> \
  --to-wallet <wallet-name>  # optional, defaults to from-wallet

Supports exact-out: use --to-amount instead of --from-amount.

Examples

Same-chain swap (SOL → USDC on Solana)

mp token swap \
  --wallet main --chain solana \
  --from-token So11111111111111111111111111111111111111111 \
  --from-amount 0.1 \
  --to-token EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v

Cross-chain bridge (ETH → USDC.e on Polygon)

mp token bridge \
  --from-wallet funded --from-chain ethereum \
  --from-token 0x0000000000000000000000000000000000000000 \
  --from-amount 0.003 \
  --to-chain polygon \
  --to-token 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174

ERC20 swap (auto-approves if needed)

mp token swap \
  --wallet funded --chain polygon \
  --from-token 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 \
  --from-amount 5 \
  --to-token 0x0000000000000000000000000000000000000000

Supported chains

solana, ethereum, base, polygon, arbitrum, optimism, bnb, avalanche, bitcoin (bridges only)

How it works

Resolves wallet name → address
Builds unsigned transaction via swaps.xyz (handles decimal conversion)
If ERC20 token needs approval, sends an approve transaction first, then re-builds
Signs locally — private key never leaves the machine
Broadcasts to the network
Registers for tracking

Read the full file on GitHub · 107 lines

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.

11d ago First seen · 107 lines · 33 tokens per session scan A 38b1ce5aff85

Subscribe to this mod's changes

moonpay-swap-tokens is a skill published in the GitHub repository moonpay/skills (111 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 858 once invoked, about $0.0002 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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moonpay-swap-tokens