| What it does | Monitoring for AI agents, cron jobs, and CI/CD pipelines that tracks started, progress, blocked and failed signals
| XML validation and schema tools for developers
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| Stage | Growing
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| Founded | Not given
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| Based in | DE
| NL
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| Pricing model | Free
| Freemium
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| Pricing | Free for individuals with no monitor cap. A paid team tier may come later with advance notice.
| Free: unlimited individual XML checks, local validation, no account required. Pro: US$19/month (US$190/year), batch 25 files, 10 cloud projects, 10 schemas, 300 validations + 250 invoices/day. Team: US$49/month (US$490/year), batch 100 files, 50 shared projects, 100 schemas, 5 seats, 1,000 validatio
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| Key features | - MCP server with 50 tools for AI agents to create their own monitors
- Absence detection that opens incidents when expected signals never arrive
- Heartbeat monitoring for cron jobs via HTTP ping
- CI/CD pipeline monitoring via signed webhooks from GitHub Actions, GitLab CI, and Jenkins
- HTTP uptime probing for status code, latency, and keyword checks
- Nine alert destinations with routing matrix and flap damping
- Public status pages with embeddable badges
- Terraform provider for monitoring as code
- Agent registry and fleet view showing monitor status
- Output assertions catching successful runs that did nothing
| - Free local XML syntax and formatting checks
- XSD 1.0 validation with local imports and includes
- Optional XSD 1.1 and ISO Schematron XPath 1.0 server validation
- Cloud schema projects with version control
- Batch validation up to 25 files (Pro) or 100 files (Team)
- API access with daily quotas
- Public HTTPS schema import and structural comparison
- EN 16931 and XRechnung invoice validation
- Multi-format invoice validation (Factur-X, KSeF, RO e-Factura, HR-CIUS)
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| What makes it different | - No SDK, library, or YAML changes required; works with any language via HTTP requests
- Durable deadlines that survive restarts and never miss a check-in
- Free for individuals with no monitor cap, fully hosted with no infrastructure to manage
- Built by a systems engineer with DevOps experience who understands silent failures
| - Browser-based validation runs locally without uploading documents by default
- Explicit server processing consent required for any upload
- Comprehensive e-invoice validation across six European formats
- Built with AI assistance and documented with primary references
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ▲ +3 (up) since last check | 1 ● no change since last check |
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| Trust Flow (Majestic) | 7 | 0 |
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| Citation Flow (Majestic) | 20 | 4 |
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| Referring domains (Majestic) | 48 | 1 |
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