Reliable data infrastructure
for developers who ship
From workforce analytics to compliance — APIs with the depth, documentation, and uptime your product depends on.
How much should we pay a Senior Backend Engineer in Berlin?
Products
Production-ready from day one
Every API ships with authentication, rate limiting, MCP server, and comprehensive documentation.
Workforce Data Suite
Salary benchmarking, cost of living, skills taxonomy, and EU economic indicators — unified API for workforce intelligence.
EInvoiceAPI
Convert, validate, and AI-parse e-invoices across Peppol BIS, XRechnung, and Factur-X.
MCP Integration
Agent-first by design
Every Aethar API ships with a production-ready MCP server. Connect your AI tools directly to live data.
One config. Every API.
The Model Context Protocol lets AI assistants call your APIs natively — no wrapper scripts, no custom plugins. Add Aethar to your Claude Desktop config and your assistant can look up salaries, compare cost of living, query skills data, or validate e-invoices in real time.
- Semantic tool names — agents understand what each endpoint does
- Structured JSON responses designed for LLM consumption
- Auth via API key header — same key works for REST and MCP
- Works with any MCP-compatible client
Supported Clients
{
"mcpServers": {
"wageapi": {
"url": "https://salary.wageapi.com/api/mcp",
"headers": { "X-API-Key": "wa_your_key" }
},
"costapi": {
"url": "https://col.wageapi.com/api/mcp",
"headers": { "X-API-Key": "cl_your_key" }
},
"skillsapi": {
"url": "https://skills.wageapi.com/api/mcp",
"headers": { "X-API-Key": "sk_your_key" }
},
"einvoice": {
"url": "https://einvoice.aethar.dev/api/mcp",
"headers": { "X-API-Key": "ei_your_key" }
}
}
}Pricing
Start free, scale as you grow
No credit card required. Every tier includes MCP server access and full API documentation.
WageAPI Suite— per product (WageAPI, CostAPI, SkillsAPI)
Free
$0
3,000 req/mo
- US + EU salary data
- CPI & PPP data
- All Skills endpoints
- MCP server
Startup
$29/mo
15,000 req/mo
- Everything in Free
- Historical trends
- 500 req/day
- 10 req/sec burst
Growth
$79/mo
75,000 req/mo
- Everything in Startup
- Pay Transparency Compliance
- 2,500 req/day
- 20 req/sec burst
Enterprise
$149/mo
300,000 req/mo
- Everything in Growth
- Gender Pay Gap Reporting
- 10,000 req/day
- 30 req/sec burst
EInvoiceAPI
Free
$0
100 req/mo
- Convert & Validate
- Format requirements
- MCP server
Startup
$29/mo
5,000 req/mo
- Everything in Free
- AI Parse (500/mo)
- 167 req/day
Growth
$79/mo
30,000 req/mo
- Everything in Startup
- AI Parse (3,000/mo)
- 1,000 req/day
Enterprise
$199/mo
150,000 req/mo
- Everything in Growth
- AI Parse (10,000/mo)
- 5,000 req/day
Contact
Establish Uplink
Start building with the free tier — no credit card required. Need custom APIs, enterprise limits, or dedicated support? Let's talk.
Mobile
Stop getting invoices
rejected.
Scan any receipt or invoice with your phone camera. Our AI extracts structured data, converts it to a compliant EU e-invoice format, and validates against country-specific rules — ready to share with your accountant in seconds.
