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Ship production-ready
messages in minutes

Stop reinventing error messages, status alerts, and UI copy for every project. Get battle-tested libraries that just work.

Browse Libraries → See How It Works
✓
Copy-paste ready
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4 formats included
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Commercial license
✓
No dependencies
394
Production-ready messages
5
Complete libraries
4
File formats
0
Dependencies

Complete message infrastructure

Each library is standalone and production-ready. Pick what you need, or get multiple libraries for complete coverage.

💬
186 messages Application Level

Application Error Messages Library

Clear, user-friendly error messages for business logic and application flows. Auth failures, payment errors, upload issues, billing problems.

  • 93 user-facing + 93 DevOps messages
  • 10 domains: auth, payments, orders, uploads, billing, profile
  • HTTP status codes mapped
  • Placeholder support for dynamic values
Best for: SaaS apps, dashboards, user portals, subscription platforms
€12 one-time
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⚡
91 messages Infrastructure

Infrastructure Status Messages Library

Status updates for system monitoring, maintenance windows, and infrastructure events. Designed for status pages and DevOps alerts.

  • 48 user-facing + 43 DevOps messages
  • 5 domains: API, system, maintenance, network, storage
  • Incident and recovery messaging
  • Planned maintenance alerts
Best for: Status pages, monitoring dashboards, DevOps alerts
€9 one-time
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🔌
32 templates API Design

API Response Templates Library

Complete JSON response structures for REST APIs. Success responses, error formats, pagination, webhooks, and metadata headers.

  • 10 success response templates (200, 201, 202, 204)
  • 10 error response templates (4xx, 5xx status codes)
  • Pagination templates (offset & cursor-based)
  • Webhook payload structures
Best for: API development, microservices, backend systems
€12 one-time
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✉️
42 snippets Email Copy

Email Copy Library

Subject lines, body snippets, and CTAs for transactional emails. Welcome emails, password resets, and system notifications.

  • 11 welcome email snippets (subjects, body, CTAs)
  • 11 password reset snippets (security-conscious)
  • 20 notification snippets (payments, exports, alerts)
  • Mix-and-match components
Best for: Transactional emails, welcome flows, password resets
€9 one-time
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🎯
43 snippets UI Copy

Onboarding Copy Library

UI copy for onboarding flows, tooltips, empty states, and success confirmations. Professional messaging for every UI state.

  • 6 welcome screen snippets (titles, body, actions)
  • 9 tooltip snippets (features, shortcuts, help)
  • 12 empty state snippets (no data, no results)
  • 9 success confirmation snippets
Best for: SaaS onboarding, tooltips, empty states, first-run experiences
€9 one-time
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How it works

Download, extract, import. No dependencies, no setup, no learning curve.

1

Pick a library

Choose the message type you need: application errors, status updates, API templates, email copy, or onboarding text.

2

Import your format

JSON for APIs, YAML for configs, CSV for spreadsheets, or Markdown for documentation.

3

Ship immediately

Map message IDs to your error handling. Replace placeholders. Production-ready in minutes.

// Example: Application Error Messages integration
import messages from './user_messages.json';

function handleError(errorId) {
  const msg = messages.find(m => m.id === errorId);
  return {
    title: msg.user_title,
    body: msg.user_body,
    action: msg.user_action
  };
}

// Use in your app
const error = handleError('USR.auth.invalid_credentials.ERR.WARN');
showToast(error.title, error.body);

Why use message libraries?

Message quality impacts user trust, support load, and product consistency.

❌ DIY from scratch

  • Writing + reviewing every message
  • Debating wording in code reviews
  • Different styles per developer
  • "Something went wrong" everywhere
  • More support tickets from confusion
  • Inconsistent tone across product

✓ Message libraries

  • Copy-paste and ship immediately
  • Focus on logic, not messaging
  • Unified tone across product
  • Clear, actionable guidance
  • Reduced confusion and tickets
  • Professional communication

Frequently asked questions

Are these complete messages or just templates?
Complete messages. Each entry includes title, body, action labels, and technical details. Ready to use as-is or customize to match your brand.
Can I modify the messages?
Yes. These are starting points. Adjust tone and wording to match your brand voice while maintaining the professional structure.
What formats are included?
JSON, YAML, CSV, and Markdown. Use whichever format fits your workflow and tech stack.
Can I use them in client projects?
Yes. Commercial use license included for all libraries. Use in your own products and client work.
Do you provide support?
You get clear documentation and integration examples with each library. For questions, reach out via your Gumroad receipt email.
Which library should I start with?
Start with Application Error Messages if you need user-facing errors, Infrastructure Status Messages for DevOps/monitoring, or API Response Templates if you're building a REST API.

Ship professional messaging faster.

Start from a production-ready baseline and focus on your product logic — not reinventing error messages and status updates.

Browse Libraries →

No subscription • Commercial license • Download and own forever