How do I install the Essential Eth API skill?

Run npx skillmds@latest add tomevault-io/essential-eth-api in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Essential Eth API safe to use?

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Which AI agents work with Essential Eth API?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Essential Eth API free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Essential Eth API?

tomevault-io (@tomevault-io) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Essential Eth API by tomevault-io — Agent Skill

Name: Essential Eth API
Author: tomevault-io

Essential Eth API

Guides usage of essential-eth, a lightweight Ethereum utility library (43 kB alternative to ethers.js/web3.js). Covers providers, contracts, conversions, hashing, and address utilities. Use when writing code that imports from essential-eth. Use when this capability is needed.

tomevault-io 52b9269 2 files · 2.7 KB Updated Sep 17, 2026

File contents

essential-eth

A tree-shakeable Ethereum library using native bigint (no BigNumber). Minimal alternative to ethers.js and web3.js.

Entry Points

essential-eth -- full library with providers, contracts, and utilities
essential-eth/utils -- utilities without providers (smaller)
essential-eth/conversions -- unit conversions only (~1.2 kB)

Key Differences from ethers.js

Uses native bigint instead of BigNumber
Read-only -- no signer or wallet support
~10x smaller bundle size
Tree-shakeable with multiple entry points

Finding the API

To see all available exports, read node_modules/essential-eth/dist/index.d.ts. This is the generated type declarations file and is always up to date.

For source code and JSDoc examples, read files in node_modules/essential-eth/dist/. Each function includes @example blocks showing usage.

Quick Reference

Providers: JsonRpcProvider, FallthroughProvider, AlchemyProvider -- create with an RPC URL, then call methods like getBalance, getBlock, call, getLogs, resolveName.

Contracts: new Contract(address, jsonAbi, provider) -- ABI methods become async functions on the instance. Read-only.

Conversions: etherToWei, weiToEther, etherToGwei, gweiToEther, formatUnits, parseUnits -- accept string | number | bigint.

Hashing: keccak256, solidityKeccak256, id, hashMessage, namehash.

Addresses: isAddress, getAddress, toChecksumAddress, computeAddress, computePublicKey.

ABI: encodeFunctionData, decodeFunctionResult, decodeEventLog.

Bytes: arrayify, hexlify, concat, hexZeroPad, isHexString, and more.

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: essential-eth-apidescription: Guides usage of essential-eth, a lightweight Ethereum utility library (43 kB alternative to ethers.js/web3.js). Covers providers, contracts, conversions, hashing, and address utilities. Use when writing code that imports from essential-eth. Use when this capability is needed.---# essential-ethA tree-shakeable Ethereum library using native `bigint` (no BigNumber). Minimal alternative to ethers.js and web3.js.## Entry Points- `essential-eth` -- full library with providers, contracts, and utilities- `essential-eth/utils` -- utilities without providers (smaller)- `essential-eth/conversions` -- unit conversions only (~1.2 kB)## Key Differences from ethers.js- Uses native `bigint` instead of `BigNumber`- Read-only -- no signer or wallet support- ~10x smaller bundle size- Tree-shakeable with multiple entry points## Finding the APITo see all available exports, read `node_modules/essential-eth/dist/index.d.ts`. This is the generated type declarations file and is always up to date.For source code and JSDoc examples, read files in `node_modules/essential-eth/dist/`. Each function includes `@example` blocks showing usage.## Quick Reference**Providers**: `JsonRpcProvider`, `FallthroughProvider`, `AlchemyProvider` -- create with an RPC URL, then call methods like `getBalance`, `getBlock`, `call`, `getLogs`, `resolveName`.**Contracts**: `new Contract(address, jsonAbi, provider)` -- ABI methods become async functions on the instance. Read-only.**Conversions**: `etherToWei`, `weiToEther`, `etherToGwei`, `gweiToEther`, `formatUnits`, `parseUnits` -- accept `string | number | bigint`.**Hashing**: `keccak256`, `solidityKeccak256`, `id`, `hashMessage`, `namehash`.**Addresses**: `isAddress`, `getAddress`, `toChecksumAddress`, `computeAddress`, `computePublicKey`.**ABI**: `encodeFunctionData`, `decodeFunctionResult`, `decodeEventLog`.**Bytes**: `arrayify`, `hexlify`, `concat`, `hexZeroPad`, `isHexString`, and more.---> Converted and distributed by [TomeVault](https://tomevault.io/claim/dawsbot) — claim your Tome and manage your conversions.

Frequently asked questions