What is megaeth-developer?

A development guide for MegaETH, a blockchain network, covering wallets, transactions, token swaps, smart contracts, and real-time application updates.

Use it when building React or Next.js apps, sending transactions, swapping tokens through Kyber Network, optimizing contract storage and gas use, or receiving live blockchain updates.

It collects the network-specific settings and development patterns needed to build and troubleshoot MegaETH applications.

megaeth-developer — Skill for Claude Code and Codex by Demerzels-lab

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 Demerzels-lab/elsamultiskillagent --skill megaeth-ai-developer-skills

Clone the repo

git clone --depth 1 https://github.com/Demerzels-lab/elsamultiskillagent

Made for: Claude Code, Codex.

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/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills/github.svg)](https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills)

Your own site

<a href="https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills/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/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/megaeth-ai-developer-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,122 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	$0.00109	$0.01122
Opus 5	$0.00055	$0.00561
Sonnet 5	$0.00022	$0.00224
Haiku 4.5	$0.00011	$0.00112

Measured 12d ago against content hash c2d74aadf44b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

megaeth-developer 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 12d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

megaeth-developer — 100% identical, 0 lines differ

public/skills/0xbreadguy/megaeth-ai-developer-skills/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MegaETH Development Skill

What this Skill is for

Use this Skill when the user asks for:

Wallet setup and management on MegaETH
Sending transactions, checking balances, token operations
Token swaps via Kyber Network aggregator
MegaETH dApp frontend (React / Next.js with real-time updates)
RPC configuration and transaction flow optimization
Smart contract development with MegaEVM considerations
Storage optimization (avoiding expensive SSTORE costs)
Gas estimation and fee configuration
Testing and debugging MegaETH transactions
WebSocket subscriptions and mini-block streaming
Bridging ETH from Ethereum to MegaETH

Chain Configuration

Network	Chain ID	RPC	Explorer
Mainnet	4326	`https://mainnet.megaeth.com/rpc`	`https://mega.etherscan.io`
Testnet	6343	`https://carrot.megaeth.com/rpc`	`https://megaeth-testnet-v2.blockscout.com`

Default stack decisions (opinionated)

1. Transaction submission: eth_sendRawTransactionSync first

Use eth_sendRawTransactionSync (EIP-7966) — returns receipt in <10ms
Eliminates polling for eth_getTransactionReceipt
Docs: https://docs.megaeth.com/realtime-api

2. RPC: Multicall for eth_call batching (v2.0.14+)

Prefer Multicall (aggregate3) for batching multiple eth_call requests
As of v2.0.14, eth_call is 2-10x faster; Multicall amortizes per-RPC overhead
Still avoid mixing slow methods (eth_getLogs) with fast ones in same request

Note: Earlier guidance recommended JSON-RPC batching over Multicall for caching benefits. With v2.0.14's performance improvements, Multicall is now preferred.

3. WebSocket: keepalive required

Send eth_chainId every 30 seconds
50 connections per VIP endpoint, 10 subscriptions per connection
Use miniBlocks subscription for real-time data

4. Storage: slot reuse patterns

SSTORE 0→non-zero costs 2M gas × multiplier (expensive)
Use Solady's RedBlackTreeLib instead of Solidity mappings
Design for slot reuse, not constant allocation

Read the full file on GitHub · 103 lines

Files

What ships with it

10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

12d ago First seen · 103 lines · 109 tokens per session scan A c2d74aadf44b

Subscribe to this mod's changes

megaeth-developer is a skill published in the GitHub repository Demerzels-lab/elsamultiskillagent (10 stars, last pushed 4mo ago), licensed MIT. It adds 109 tokens to every session and 1,122 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 2026-08-31.

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