Practical developer utilities

Small tools for annoying production problems.

Practical scripts and step-by-step guides for website warnings, email authentication, Stripe webhooks, and CSV cleanup. Download a ZIP and run the tools in your own environment.

Local-first where possible Direct crypto payment No wallet connection Download after confirmation
The catalog

Four narrow tools, one bundle.

Every kit includes source code, instructions, and a license. One-time purchase. No subscription.

Why these exist

Built around recurring pain, not trend chasing.

Site trust incidents

Owners repeatedly report sudden Chrome / Safe Browsing warnings with little guidance on whether the cause is injected code, a compromised dependency, DNS, or a legitimate false positive.

Email authentication

Small businesses still lose legitimate mail because SPF, DKIM, or DMARC is missing or misconfigured, while the DNS mechanics remain confusing to non-specialists.

Webhook reliability

Payment succeeds, application state does not. Signature parsing, duplicate delivery, retries, deploy interruptions, and silent event loss are recurring production problems.

Messy CSV imports

Teams still spend hours fixing duplicates, inconsistent headers, whitespace, dates, and mixed formats before CRM or ERP imports.

Checkout

Pay directly. Prove the transaction. Download.

  1. 1
    Choose a product and network

    The server creates a live USD-denominated quote for an available network. Choose Bitcoin, Ethereum, or Solana on its native mainnet.

  2. 2
    Send payment yourself

    No wallet connect, no seed phrase, and no custodial checkout. You copy the destination and amount into your own wallet.

  3. 3
    Paste the transaction ID

    The server checks the public chain, verifies destination, amount, timing and confirmation, then locks that transaction to one order.

  4. 4
    Get a short-lived download

    A signed, expiring link is issued only after payment is verified.

Product rules

What we will and will not sell.

Runnable before readable

If a problem can be checked by a script, the product ships a script. Documentation explains decisions instead of replacing the tool.

No invented certainty

Security and data tools flag evidence for review. They do not declare a site “clean,” silently rewrite ambiguous dates, or promise inbox placement.

Keep sensitive data local

The CSV utility runs on the buyer’s computer. The store never asks for customer spreadsheets, API keys, passwords, wallet secrets, or private keys.