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Modernize Your API Gateway — MCP, Multi-Tenant, European Sovereign

The European Agent Gateway — govern AI-to-API interactions with MCP support, multi-tenant isolation, and NIS2/DORA compliance.

⚡ Quick Start

From zero to API call in 3 steps — works with cURL, Python, TypeScript, or Claude.ai

🔑1. Subscribe to an API
# Subscribe to an API
# Set STOA_API_URL to your instance (e.g. https://api.gostoa.dev)
curl -X POST $STOA_API_URL/v1/subscriptions \
-H "Authorization: Bearer $STOA_TOKEN" \
-H "Content-Type: application/json" \
-d '{
"api_id": "billing-api",
"plan": "starter"
}'
🚀2. Make API Calls
# Call an API through STOA Gateway
# Set STOA_GATEWAY_URL to your instance (e.g. https://mcp.gostoa.dev)
curl $STOA_GATEWAY_URL/v1/billing/invoices \
-H "X-API-Key: $API_KEY" \
-H "Content-Type: application/json"
📊3. Monitor Usage
# Check your API usage and quota
curl $STOA_API_URL/v1/subscriptions/sub-123/quota \
-H "Authorization: Bearer $STOA_TOKEN"

# Response:
# {
# "requests_used": 8420,
# "requests_limit": 10000,
# "reset_at": "2026-02-01T00:00:00Z"
# }

✨ Why STOA?

Built for the AI era — not retrofitted

🤖

MCP Gateway

Native Model Context Protocol support. Let AI agents discover and call your APIs automatically with full governance and audit trails.

🏢

Multi-Tenant

Complete tenant isolation with Kubernetes namespaces, separate Keycloak realms, and schema-per-tenant database design.

📊

AI Gateway

Token metering, semantic caching, smart routing across LLM providers. Control AI costs with per-team quotas and dashboards.

🔄

GitOps Native

ArgoCD integration for declarative tenant provisioning. Everything as code, everything auditable, everything reproducible.

🇪🇺

European Sovereign

European hosting available. NIS2 and DORA supportive features. Host in EU with full data residency control.

📖

Open Source

Apache 2.0 licensed. No vendor lock-in, no restrictive licensing. Contribute, fork, or self-host freely.

⚡ Time to First Agent Call

STOA optimizes for AI agents, not just human developers

MetricTraditional GatewaySTOA + MCP
API Discovery📚 Read docs manually🔍 Auto-discovery via MCP
Authentication🔑 Manual key management⚡ JWT context injection
First API Call⏱️ Days to weeks⚡ Seconds
AI Agent Support❌ Not designed for it✅ Native MCP Gateway
Token Metering❌ Not available✅ Per-team dashboards

Ready to get started?

Deploy STOA in your infrastructure or try our managed cloud.