AI API Gateway with OpenAI-compatible and Claude Messages-compatible endpoints
EU-resident inference API for open-weight language models
Stage
Not given
MVP
Founded
Not given
Not given
Based in
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ES
Pricing model
Paid
Contact for pricing
Pricing
Pay as you go with transparent pricing. Pricing varies by model: GPT-6 Astra $1.00 input / $5.00 output per 1M tokens, GPT-5.6 Sol $0.50 input / $3.00 output per 1M tokens, Claude Fable 5 $2.00 input / $10.00 output per 1M tokens, Claude Opus 5 $1.00 input / $5.00 output per 1M tokens, Grok 4.5 $0.4
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Key features
OpenAI-compatible endpoints
Claude Messages-compatible endpoints
Access to GPT, Claude, Grok, and Gemini models
Live model pricing transparency
Usage tracking and console management
Stripe-secured top-ups
ZDR-ready routing
Low-latency upstream routing
Single unified endpoint
OpenAI-compatible Responses and Chat Completions endpoints
Streaming with Server-Sent Events
Function calling and tool use
Structured JSON output with schema validation
Audio transcription with file and live WebSocket modes
Text-to-speech with built-in and customizable voices
Speech-to-speech translation
Time series forecasting up to 1,000 periods
Per-key usage tracking and limits
Servers owned and operated by NPAW in EU
What makes it different
Up to 90% cost savings on frontier models
Security-first with ZDR data-retention control
Sub-2 second response time
Compatible with existing SDKs
Transparent, no lock-in pricing
Data residency in EU with no US sub-processor in the data path
OpenAI-compatible API so teams can keep existing integrations
Three capability levels—Z Ultra, Z Pro, Z Fast—on the same API
Operated by NPAW, which has run its own data infrastructure since 2008
ISO 27001, ISO 27701, ISO 42001 and ENS High certified
Zarx