| What it does | Free Australian tax API and MCP server for AI agents
| Create add-to-calendar links from your own code or let an AI assistant do it
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| Stage | Not given
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| Founded | Not given
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| Based in | AU
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| Pricing model | Open source
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| Key features | - Take-home pay calculator for Australian salaries and hourly rates
- PAYG withholding calculation using ATO Schedule 1 formulas
- Bonus and commission withholding calculation
- Annual tax estimate with offsets and Medicare levy
- Superannuation guarantee calculation at 12%
- ABN, ACN and TFN validation using check-digit algorithms
- MCP server integration for Claude, ChatGPT and Cursor
- JSON API accessible without sign-up or API key
- Open-source JavaScript npm library with no dependencies
- Tax rates and thresholds for 2025–26, 2026–27 and 2027–28
| - Create events via REST API with details like name, date, time, timezone and location
- Generate shareable calendar links for each event
- MCP server integration with AI assistants like Claude
- List events with page views, calendar button clicks and RSVP counts
- Track RSVPs with accept and decline counts
- Add or remove event flyers from URL or base64
- Custom event links with personalized slugs
- Open source MCP package for local deployment
- Support for Google Calendar, Apple Calendar, Outlook and other calendar apps
- Rate limiting of 100 requests per 10 seconds per IP
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| What makes it different | - Uses ATO's own published formulas, not model memory
- Tested against all 432 ATO sample rows for each tax year
- No sign-up, API key or authentication required
- Open-source code available on GitHub
- Free for reasonable use with no storage of amounts entered
| - Built-in MCP server support for seamless AI assistant integration
- Open source option with tap2cal-mcp package for local deployment
- Multi-calendar support allowing guests to save to their preferred calendar app
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 6 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 17 |
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| Referring domains (Majestic) | 0 | 4 |
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AfterTax AU
Tap2Cal