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Multi-model AI gateway with credits-based billing, agentic orchestration, and 50+ pre-built agents.

What is Majestix AI Inference Hub?

Majestix AI Inference Hub is an AI-as-a-Service backend that gives you unified access to 18 models across 4 providers — Anthropic (Claude), OpenAI (GPT-5), Google (Gemini 3), and open-source models via OpenRouter — through a single API with a single billing system.

Instead of managing API keys, rate limits, and billing for each provider separately, you get one endpoint, one credit system, and automatic provider fallback when things go wrong.

Key Features

Multi-Model Gateway

18 models from Anthropic, OpenAI, Vertex AI, and OpenRouter
Automatic provider fallback on failure
Auto-routing based on task complexity
SSE streaming for all models

Credits System

Pay-as-you-go with simple credit-based pricing
1 credit = $0.001 USD
Plans: Free (500 cr/mo), Guru ($10/mo, 10K cr), Pro ($50/mo, 55K cr)
Reservation-based billing prevents overcharges

Authentication

API keys for programmatic access (VSCode, CLI, SDK)
Firebase Auth + App Check for web apps
OIDC for service-to-service communication

Agentic Orchestration

Scheduled agent tasks with server-side tool execution
Ensemble consensus: 3 models iterate until quality threshold met
Swarm pipelines: multi-agent sequential workflows
50+ pre-built agents for common tasks

Security

8-layer defense-in-depth for agent execution
KMS-encrypted credentials at rest
DNS-pinned requests (TOCTOU prevention)
Default-deny URL whitelist

Architecture at a Glance

Clients (Web, VSCode, CLI, Cloud Tasks)
    |
    v
inference-api (Cloud Run)          agent-executor (Cloud Run)
  /chat, /code, /models             /execute, /ensemble, /swarm
  Credits + Auth + Routing           Agentic loops + Tools + Security
    |                                    |
    v                                    v
  Anthropic | OpenAI               External APIs (DNS-pinned)
  Vertex AI | OpenRouter           Firestore + Cloud KMS