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web3xDev/README.md

Hi, I'm Muhammed Alparslan 👋

Frontend-focused web3 full-stack dev. I build polished onchain products, fast.

2+ years shipping production web3 UIs as a frontend engineer on a US DeFi platform built on Uniswap v3. Now I'm all-in on x402 and agentic payments: the rail for machines that pay per request.

Flash402 — flash402.xyz

Onchain USDC paywall for any API using x402. Drop it in front of an endpoint, no accounts or API keys, and humans or agents pay per call.

📖 Case study: flash402-showcase

Paywright — paywright.xyz

The Postman for x402. Hit an endpoint, pay in USDC from your wallet, inspect the settled response with receipt and onchain trace.

📖 Case study: paywright-showcase

🛠️ Stack

TypeScript · React · Next.js · Tailwind · wagmi · viem · Postgres

What I reach for most. I pick up whatever a project needs.

🌱 Open source contributions

  • injective-ts — fixed a mapping bug where the auction module returned the bid amount instead of the bidder address (#704); exposed missing injBasketMaxCap/biddersWhitelist fields in module params (#705)
  • elfa-sdk-js — fixed 429 retries ignoring the server's rate-limit reset, landed as #97; co-authored the MentionType/billingMode narrowing in #96
  • altana-sdk — fixed a race condition where hireErc8183Agent's noWait mode threw a false error and risked double-spending escrowed funds, landed as #42

📦 Past builds

  • StarkMint — no-code launchpad for Starknet. Create your own token or NFT collection without writing a line of Cairo.
  • MintZilla — no-code launchpad for EVM chains. Create your own token without writing a line of Solidity.

🤝 Reach me

LinkedIn · Portfolio

Pinned Loading

  1. flash402-showcase flash402-showcase Public

    Turn any API into a pay-per-call endpoint — an onchain USDC paywall over HTTP 402, built on the x402 protocol. Live product case study.

  2. paywright-showcase paywright-showcase Public

    The Postman for x402: test, pay, and inspect any x402 endpoint end to end. Live product case study.

  3. StarkMint-tool StarkMint-tool Public

    An Intuitive No Code Platform for Creating ERC20 Tokens and ERC721 NFTs on Starknet

  4. MintZilla-tool MintZilla-tool Public

    No-Code ERC20 Token Generator for Ethereum and EVM chains.

    Solidity

  5. PancakeSwap-Pair-Monitor PancakeSwap-Pair-Monitor Public

    Real-time liquidity pair tracking tool for PancakeSwap on Binance Smart Chain, utilizing WebSocket for live updates and event monitoring.

    JavaScript

  6. SolidityAnalyzer SolidityAnalyzer Public

    Analyzing Solidity smart contracts with Slither through a React interface

    TypeScript 1