Agent skill

Weth Base Sepolia

Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia.

Install Weth Base Sepolia

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .claude/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .claude/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .agents/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .agents/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .cursor/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .cursor/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/keypo-us/keypo-cli.git --path skills/contracts/weth-base-sepolia

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .gemini/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .gemini/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .github/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .github/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install keypo-us/keypo-cli weth-base-sepolia --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/keypo-us/keypo-cli.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/contracts/weth-base-sepolia .opencode/skills/weth-base-sepolia && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "weth-base-sepolia" agent skill from https://github.com/keypo-us/keypo-cli/tree/main/skills/contracts/weth-base-sepolia into .opencode/skills/weth-base-sepolia/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "weth-base-sepolia", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: weth-base-sepolia
GitHub stars: 182
Token cost: ~1.5k tokens
SKILL.md length: 207 words
Files: 1
Skills in repo: 7
Repo updated: Apr 2, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia.

Backend & APIs work in your project
SKILL.md covers Read Functions, Write Functions, Common Patterns and Amount Encoding
Reaches sepolia.base.org

What it does

Weth Base Sepolia is an agent skill from keypo-us/keypo-cli. Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia. Wrap and unwrap ETH, check balances, and manage ERC-20 WETH allowances. Use with keypo-wallet for transaction execution — use cast calldata to encode function calls and pipe to keypo-wallet send or keypo-wallet batch.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs. It works with Ethereum. The repository describes itself as: Local-first, hardware-bound key management and encrypted secrets for AI agents. The licence is MIT.

When your agent uses it

Backend & APIs work in your project

Example prompts

“/weth-base-sepolia”

What it can do on your machine

Read from SKILL.md and the folder at commit 7331b6f. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- sepolia.base.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Weth Base Sepolia loads about 1.5k tokens when it runs. Until then it costs about 85 tokens; SKILL.md has 207 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~85
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from keypo-us/keypo-cli at commit 7331b6f, republished under its MIT licence (© keypo-us). 207 words, ~1,532 tokens.

Download SKILL.mdSave it as .claude/skills/weth-base-sepolia/SKILL.md (or your agent's skills folder).

name: weth-base-sepolia
description: Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia. Wrap and unwrap ETH, check balances, and manage ERC-20 WETH allowances. Use with keypo-wallet for transaction execution — use `cast calldata` to encode function calls and pipe to `keypo-wallet send` or `keypo-wallet batch`.
license: MIT
metadata.author: auto-generated by contract-learner
metadata.version: 1.0.0
metadata.source-contract: 0x4200000000000000000000000000000000000006
metadata.chain: Base Sepolia
metadata.chain-id: 84532
metadata.generated: 2026-03-06

Wrapped Ether — WETH (Base Sepolia)

Field	Value
Address	`0x4200000000000000000000000000000000000006`
Chain	Base Sepolia (Chain ID: 84532)
Type	Token (ERC-20 wrapper for native ETH)
Decimals	18
Symbol	WETH
RPC	`https://sepolia.base.org`

Auto-generated from verified ABI. Do not modify the address or function signatures.

Read Functions

Use cast call — no wallet needed, no gas cost.

name

bash

cast call 0x4200000000000000000000000000000000000006 "name()(string)" --rpc-url https://sepolia.base.org

symbol

bash

cast call 0x4200000000000000000000000000000000000006 "symbol()(string)" --rpc-url https://sepolia.base.org

decimals

bash

cast call 0x4200000000000000000000000000000000000006 "decimals()(uint8)" --rpc-url https://sepolia.base.org

totalSupply

bash

cast call 0x4200000000000000000000000000000000000006 "totalSupply()(uint256)" --rpc-url https://sepolia.base.org

balanceOf

bash

cast call 0x4200000000000000000000000000000000000006 "balanceOf(address)(uint256)" <account> --rpc-url https://sepolia.base.org

allowance

bash

cast call 0x4200000000000000000000000000000000000006 "allowance(address,address)(uint256)" <owner> <spender> --rpc-url https://sepolia.base.org

Write Functions

Encode calldata with cast calldata, then execute via keypo-wallet.

deposit

Wrap ETH into WETH. Send ETH with the transaction and receive an equal amount of WETH.

bash

# This function is payable — specify the ETH amount to wrap in --value (wei)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --value <wei-amount>

No calldata needed — calling the contract with ETH triggers the fallback/deposit. To use the explicit deposit() function:

bash

CALLDATA=$(cast calldata "deposit()")
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA --value <wei-amount>

Verify: Check your WETH balance after wrapping:

bash

cast call 0x4200000000000000000000000000000000000006 "balanceOf(address)(uint256)" <your-address> --rpc-url https://sepolia.base.org

withdraw

Unwrap WETH back into native ETH. Burns WETH and returns ETH to your wallet.

bash

CALLDATA=$(cast calldata "withdraw(uint256)" <wad>)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Verify: Check your WETH balance decreased:

bash

cast call 0x4200000000000000000000000000000000000006 "balanceOf(address)(uint256)" <your-address> --rpc-url https://sepolia.base.org

approve

Approve a spender to transfer WETH on your behalf.

bash

CALLDATA=$(cast calldata "approve(address,uint256)" <spender> <wad>)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Verify:

bash

cast call 0x4200000000000000000000000000000000000006 "allowance(address,address)(uint256)" <your-address> <spender> --rpc-url https://sepolia.base.org

transfer

Transfer WETH to another address.

bash

CALLDATA=$(cast calldata "transfer(address,uint256)" <recipient> <wad>)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Verify:

bash

cast call 0x4200000000000000000000000000000000000006 "balanceOf(address)(uint256)" <recipient> --rpc-url https://sepolia.base.org

transferFrom

Transfer WETH from one address to another (requires prior approval).

bash

CALLDATA=$(cast calldata "transferFrom(address,address,uint256)" <src> <dst> <wad>)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Verify:

bash

cast call 0x4200000000000000000000000000000000000006 "balanceOf(address)(uint256)" <dst> --rpc-url https://sepolia.base.org

Common Patterns

Wrap ETH (deposit)

bash

# Wrap 0.01 ETH into WETH
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --value 10000000000000000

Unwrap WETH (withdraw)

bash

# Unwrap 0.01 WETH back to ETH
CALLDATA=$(cast calldata "withdraw(uint256)" 10000000000000000)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Approve + TransferFrom (batched)

bash

APPROVE_DATA=$(cast calldata "approve(address,uint256)" <spender> <wad>)
TRANSFER_DATA=$(cast calldata "transferFrom(address,address,uint256)" <your-address> <recipient> <wad>)

echo "[
  {\"to\": \"0x4200000000000000000000000000000000000006\", \"value\": \"0\", \"data\": \"$APPROVE_DATA\"},
  {\"to\": \"0x4200000000000000000000000000000000000006\", \"value\": \"0\", \"data\": \"$TRANSFER_DATA\"}
]" | keypo-wallet batch --key <key-name> --calls -

Amount Encoding

This token uses 18 decimals. Always convert human-readable amounts:

Human Amount	Raw Amount (wei)
1.0	1000000000000000000
0.1	100000000000000000
0.01	10000000000000000
0.001	1000000000000000
100	100000000000000000000

To wrap 1.0 ETH into WETH:

bash

keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --value 1000000000000000000

To transfer 1.0 WETH:

bash

CALLDATA=$(cast calldata "transfer(address,uint256)" <recipient> 1000000000000000000)
keypo-wallet send --key <key-name> --to 0x4200000000000000000000000000000000000006 --data $CALLDATA

Files

Just SKILL.md in skills/contracts/weth-base-sepolia of keypo-us/keypo-cli.

Open the folder on GitHubat commit 7331b6f

Compare with similar skills

Weth Base Sepolia next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Weth Base Sepolia compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Weth Base Sepolia this skillkeypo-us/keypo-cli	182	—	~1.5k	Automated safety check: Pass	MIT	6 mo ago
Explorer Contract Verificationsablier-labs/evm-monorepo	353	—	~1.9k	Automated safety check: Pass	Custom licence	yesterday
Abi EncodingNethereum/Nethereum	2.3k	—	~1.3k	Automated safety check: Pass	MIT	5 days ago
Developing Smart ContractsLFDT-Lineth/lineth-monorepo	126	—	~1.4k	Automated safety check: Pass	AGPL-3.0	yesterday
Deposit QrSuperior-Trade/superior-skills	215	—	~1.1k	Automated safety check: Pass	MIT	1 mo ago
Squash BugbotLFDT-Lineth/lineth-monorepo	126	—	~3.3k	Automated safety check: Pass	Apache-2.0	yesterday

Similar skills

Explorer Contract Verification
sablier-labs/evm-monorepo
Verify smart contracts on Etherscan, Routescan, and Blockscout block explorers.
353 GitHub stars~1.9k tokensUpdated yesterday
Backend & APIsAuto-check passed
Abi Encoding
Nethereum/Nethereum
Encode and decode Ethereum ABI data with Nethereum. An agent skill from Nethereum/Nethereum.
2.3k GitHub stars~1.3k tokensUpdated 5 days ago
Backend & APIsAuto-check passed
Developing Smart Contracts
LFDT-Lineth/lineth-monorepo
Solidity smart contract development guidelines for Lineth blockchain.
126 GitHub stars~1.4k tokensUpdated yesterday
Backend & APIsAuto-check passed
Deposit Qr
Superior-Trade/superior-skills
A skill your agent uses when a user needs a QR code or wallet payment URI to fund a Superior-managed EVM wallet on a specific chain before using Lighter, Polymarket, Hyperliquid, or other Superior…
215 GitHub stars~1.1k tokensUpdated 1 mo ago
Backend & APIsAuto-check passed
Squash Bugbot
LFDT-Lineth/lineth-monorepo
Triage unresolved bot review comments on a GitHub PR. An agent skill from LFDT-Lineth/lineth-monorepo.
126 GitHub stars~3.3k tokensUpdated yesterday
Backend & APIsAuto-check passed
Ops Indexer Query
boundless-xyz/boundless
Internal — for Boundless team members only. An agent skill from boundless-xyz/boundless.
193 GitHub stars~3.5k tokensUpdated 1 mo ago
Backend & APIsAuto-check passed

Questions about Weth Base Sepolia

What does Weth Base Sepolia do?

Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia. Weth Base Sepolia is an agent skill from keypo-us/keypo-cli. Interact with Wrapped Ether (WETH) at 0x4200000000000000000000000000000000000006 on Base Sepolia.

When should I use Weth Base Sepolia?

Weth Base Sepolia fits situations like: backend & APIs work in your project.

How do I install Weth Base Sepolia in Claude Code?

Run `npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a claude-code`. Or copy the skill folder (skills/contracts/weth-base-sepolia in keypo-us/keypo-cli) into .claude/skills/weth-base-sepolia in your project. Claude Code loads it when a task matches its description.

How do I install Weth Base Sepolia in Codex?

Run `npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a codex`. Or copy the skill folder (skills/contracts/weth-base-sepolia in keypo-us/keypo-cli) into .agents/skills/weth-base-sepolia in your project. Codex loads it when a task matches its description.

Can I use Weth Base Sepolia in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add keypo-us/keypo-cli --skill weth-base-sepolia -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/weth-base-sepolia, .gemini/skills/weth-base-sepolia, .github/skills/weth-base-sepolia and .opencode/skills/weth-base-sepolia in your project.

What does Weth Base Sepolia need to run?

SKILL.md names no scripts, command-line tools or credentials: Weth Base Sepolia is instructions for the agent only.

Does Weth Base Sepolia access the network?

SKILL.md names 1 domain. In commands or code: sepolia.base.org; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Weth Base Sepolia safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Weth Base Sepolia use?

Weth Base Sepolia is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Weth Base Sepolia use?

About 1.5k tokens (SKILL.md is roughly 6.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Weth Base Sepolia?

Skills that share tags, products or a category with Weth Base Sepolia: Explorer Contract Verification (sablier-labs/evm-monorepo, 353 stars), Abi Encoding (Nethereum/Nethereum, 2.3k stars), Developing Smart Contracts (LFDT-Lineth/lineth-monorepo, 126 stars) and Deposit Qr (Superior-Trade/superior-skills, 215 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Weth Base Sepolia?

keypo-us (a GitHub organization) maintains it in keypo-us/keypo-cli, which has 182 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on April 2, 2026.

Source: keypo-us/keypo-cli on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Weth Base Sepolia

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Wrapped Ether — WETH (Base Sepolia)

Read Functions

name

symbol

decimals

totalSupply

balanceOf

allowance

Write Functions

deposit

withdraw

approve

transfer

transferFrom

Common Patterns

Wrap ETH (deposit)

Unwrap WETH (withdraw)

Approve + TransferFrom (batched)

Amount Encoding

Files

Compare with similar skills

Similar skills

More from keypo-us/keypo-cli

Related

Questions about Weth Base Sepolia