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What is API Gateway Federation?

Dakshitha — Thu, 19 Jun 2025 06:12:59 +0000

Centralized API Management and Gateway Federation: Why It Matters

Dakshitha ・ Jun 17

#api #platformengineering #devops #apigateway

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Dakshitha — Wed, 18 Jun 2025 05:30:41 +0000

Dakshitha

Jun 17 '25

Centralized API Management and Gateway Federation: Why It Matters

#api #platformengineering #devops #apigateway

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6 min read

Centralized API Management and Gateway Federation: Why It Matters

Dakshitha — Tue, 17 Jun 2025 10:51:26 +0000

Originally published on the WSO2 Tech Blog:
What Is API Gateway Federation? A Guide to Centralized API Management

As organizations scale their API programs, managing APIs across multiple gateways—Kong, Azure, Apigee, WSO2, and others—has become increasingly complex.

Gateway federation is emerging as a powerful pattern to solve this problem enabling centralized API control, policy enforcement, and observability across distributed gateway environments.

In this post, we’ll break down:

What gateway federation is and why it’s gaining traction
How a centralized control plane simplifies deployment and governance
How WSO2 supports this today, and what’s coming next

If you're running APIs across multiple clouds, business units, or Kubernetes clusters, this guide will help you rethink how control and scale can work together.

Let’s dive in.

What Is API Gateway Federation?

API gateway federation refers to the integration and management of multiple API gateways within a unified control plane. This approach allows organizations to use different API gateways, which may be from various vendors or tailored to specific environments (e.g., cloud-based, on-premises), while centrally managing their configurations, policies, and monitoring.

Figure 1: API gateway federation with a unified control plane

Reasons to Adopt Federated API Gateways

Customizability and Flexibility

Organizations often have different API needs across departments or regions. Different gateways can be configured to meet the specific needs of various business units or applications.
Beyond tailored setups, federated gateways also encourage innovation. Teams can test new features on specific gateways without impacting the broader infrastructure. Example: Employing Solace as an event broker in event-driven services.

Operational Resilience

Gateway federation enhances fault tolerance across the API infrastructure. If one gateway fails, others continue to operate, minimizing disruption.
It also simplifies maintenance. Gateways can be updated, patched, or even replaced independently, without needing a full system-wide deployment.
Additionally, each gateway can scale independently based on traffic demands, improving resource efficiency. Example: Multi-cloud deployments with different maintenance windows and varying traffic loads.

Localized Compliance and Governance

Many regions have unique legal and compliance requirements around data handling, API security, and privacy. Federated gateways enable region-specific enforcement of such policies, ensuring compliance without the need to enforce overly rigid global rules that may not be necessary elsewhere.
By deploying APIs to local gateways (such as in the EU or APAC), organizations can also meet data residency requirements. This ensures sensitive information remains within jurisdictional boundaries, avoiding regulatory issues and building customer trust.

Multi-Cloud and Hybrid Environment Support

Gateway federation allows organizations to be truly cloud-agnostic. APIs can be deployed across multiple cloud providers (such as AWS, Azure, or GCP) based on cost, performance, or feature needs. This flexibility not only avoids vendor lock-in but also helps optimize resources across teams and geographies.
Moreover, federated gateways make hybrid integration straightforward. On-premises systems can coexist with cloud native services under the same control plane. For example, internal systems hosted on VMware or bare metal can securely communicate with cloud-hosted APIs via Kubernetes gateways, enabling modernization initiatives.

Legacy Gateway Continuity

Migrating away from legacy gateways often isn't immediate. Some business units may still rely on older systems, and rewriting everything at once can be both risky and expensive. Gateway federation offers a smooth transition path by allowing organizations to manage legacy gateways alongside newer ones from the same control plane. This coexistence enables gradual migration, testing, and replacement. Example: Unified control over legacy VM gateways and cloud-native Kubernetes gateways.

What Problems Are We Solving?

In many organizations, the use of multiple API gateways is common, driven by diverse business units, deployment models, or environments.

This creates several challenges:

Fragmented API governance: Cloud vendors, edge platforms, and hybrid deployments often operate with siloed policy enforcement, making it difficult to maintain uniform governance standards.
Developer friction: Inconsistent control planes mean developers face different tools, configurations, and deployment methods, slowing down delivery and increasing cognitive overhead.
Operational inefficiency: Managing different pipelines, monitoring tools, and configurations for each gateway adds unnecessary complexity and drains platform engineering resources.
Legacy migration hurdles: Older gateways that still serve critical workloads often can't be immediately decommissioned, necessitating a solution that supports coexistence and gradual transition.

Who Benefits from Gateway Federation?

API developers: Gain a streamlined, consistent workflow for creating, deploying, and testing APIs, regardless of the underlying gateway. They no longer need to learn or adapt to multiple control plane interfaces.
API consumers: Discover, subscribe to, and use APIs from a unified Developer Portal—even if those APIs are served from different gateway backends. This improves usability and speeds up integration.
Platform engineers and administrators: Reduce tooling sprawl and operational overhead by consolidating API gateway governance into a single control plane. Enables them to enforce security, rate limiting, and analytics policies centrally.
Enterprise architects: Design more flexible, modular API architectures across multi-cloud and hybrid environments while preserving visibility and policy consistency.
Business stakeholders and CIOs: Align technology choices with business unit requirements without sacrificing governance. Federation allows for local autonomy with central oversight, which is key for regulated industries or global organizations.

WSO2's Approach to Gateway Federation

WSO2 API Manager addresses these challenges with a unified API control plane that supports multiple gateway types:

Universal Gateway for VM-based or cloud deployments
Kubernetes Gateway for container-native environments
Immutable (Micro) Gateway for edge or secure zones
AWS API Gateway for deploying APIs on AWS infrastructure
Solace Event Broker for event-driven architectures to deploy asynchronous APIs using the AsyncAPI specification

Figure 2: WSO2's unified API control plane with supported gateways for API federation

The API control plane allows you to:

Publish APIs from a single Publisher UI: Define and manage APIs once and make them available across environments—on-prem, cloud, or edge—without duplicating workflows.
Maintain consistent token validation and API policies: Apply security policies such as OAuth2/JWT validation, rate limiting, and scopes uniformly across all federated gateways.
Use a single developer portal for unified API discovery and subscription: API consumers get a centralized marketplace of APIs regardless of where the APIs are actually hosted or deployed.
Integrate event-driven and cloud native APIs alongside traditional HTTP APIs: Support AsyncAPI and real-time services (via Solace) as first-class citizens, enabling modern use cases like event streaming, IoT, and real-time analytics.

What We Support Today

Central API Control Plane (ACP): One control center to configure, deploy, and manage APIs across all gateway types.
Gateway environments: Choose which gateway environments—across regions, clouds, or business units—an API should be deployed to.
Unified developer portal: A single developer portal to discover and interact with APIs, regardless of where they're deployed.
Seamless key/token management: OAuth2/JWT token validation works across gateways.
Pluggable gateway support: In addition to the gateways already mentioned, you can integrate any API gateway with the WSO2 Control Plane using our extension point. Simply build and register a custom gateway agent to bring your preferred runtime into the federated setup. Learn how to configure a custom gateway agent.

What's Next: Our Vision

API management is evolving. As gateway runtimes become standardized, the emphasis is shifting to governance, policy enforcement, and developer experience. Gateway federation is an emerging concept that shows considerable long-term promise and is expected to achieve mainstream adoption within the next 5–10 years.

WSO2 is actively investing in this space to unlock the full potential of federated API management. Our current capabilities allow publishing APIs to any number of connected gateways from a single API Manager Control Plane. The next stage in our vision is to govern APIs on external gateways (even those not published via WSO2) by connecting in read-only mode and applying governance capabilities.

We're continuing to invest in this area to:

Add federated analytics and observability for better cross-gateway insights
Support multi-tenancy and organization-aware federation
Improve the self-service developer experience across federated gateways
Enhance GitOps support for declarative gateway configuration
Expand support for additional gateway types, such as Kong Gateway, Azure API Management Gateway, Apigee Gateway, and more.

Learn More and Get Hands-on

Want to see API federation in action? Follow our step-by-step guide to set up the Universal Gateway, Kubernetes Gateway, and Immutable Gateway—all managed through a single API Control Plane. Dive into the documentation to learn how to configure gateway federation for your team.

TL;DR: WSO2 API Manager brings centralized governance to distributed gateways, solving the mess of disconnected API operations across cloud, on-prem, and edge environments. With support for multiple gateway types and a unified control plane, platform teams can operate efficiently, securely, and with less risk.

All Your APIs, One Control Plane: What's New in WSO2 API Manager’s Latest Release

Dakshitha — Mon, 21 Apr 2025 15:25:00 +0000

If your day-to-day involves juggling APIs across multiple environments, tools, teams, and now (thanks to 2024-AI services) you’re not alone. And if it sometimes feels like you’re stitching together a modern API architecture with duct tape, this one’s for you.

The March 2025 release of WSO2 API Manager is here, and it brings real improvements for developers managing the chaos behind modern digital systems. Whether you’re deep in Kubernetes, stuck wrangling third-party SaaS APIs, or trying to rein in LLM access across teams, this release is packed with tools to help you build, govern, and ship APIs faster and safer.

Here’s a rundown of what’s new and why it actually matters in real-world dev workflows.

Universal API Governance: One Pane of Glass

Need a single place to see and control everything, the APIs you build and the ones you consume?

The latest release doubles down on the universal control plane. You can now manage and monitor all your APIs—no matter where they’re running—from one dashboard. And we don’t mean just WSO2 gateways. This release introduces full support for:

WSO2 Universal Gateway
WSO2 Kubernetes Gateway
WSO2 Immutable Gateway
AWS API Gateway
Solace Gateway

Taming the AI Chaos with an AI Gateway

Let’s face it, AI integration in teams often feels like the "wild west". One developer’s calling GPT from staging, another’s running fine-tuned LLMs locally, and nobody has a clue who’s using what or where the data’s going. Governance? What governance?

That’s exactly why WSO2 introduced its AI API Gateway—and with this release, it’s getting even smarter.

Already, the gateway supports:

Token-based rate limits
AI usage analytics
Secure API management for services like Azure, OpenAI and Mistral
Fine-grained access control
Visibility into API consumption and usage patterns

But the real game-changer in this release? Multi-Model Routing. This new capability allows you to:

Distribute requests across multiple AI models
Dynamically route traffic based on performance, availability, or cost
Scale AI-powered applications without adding operational chaos

Oh, and yes, all of this works with the rest of your APIs, just like any other API Gateway feature in WSO2 API Manager.

Want SaaS? Try Bijira — Built for API Management

Prefer a fully managed option? Check out Bijira, our new SaaS API management platform. It's built on Choreo’s rock-solid backend (so you still get observability, org/project management, etc.), but it’s focused on API workflows.

Bijira includes:

A redesigned developer-friendly UX
Visual tools to compose ingress and egress APIs
Features for composing multiple backends into a single API

It’s built to help you go from idea to deployed API—fast.

Check out the AI enhancements designed to make your API workflows smarter:

AI-Assisted API Design — Just Describe It

Tired of writing OpenAPI specs from scratch? We get it. The new AI Designer lets you build an API from a simple prompt:

"Create a REST API for managing warehouse inventory"

You’ll get an OpenAPI spec, proxy setup, and can deploy it to your preferred gateway—without digging through documentation or boilerplate.

AI Search Assistant — Find What You Forgot You Built

If your company has 500+ APIs and your team keeps re-implementing the same stuff, the AI Search Assistant is a lifesaver.

It lets you search your entire API catalog using natural language:

“Find a payments API that supports recurring billing”

“Compare FX conversion APIs”

“What’s the FHIR API for lab test submissions?”

You get usable results, comparisons, and even docs—without guessing endpoint names or reading 20 swagger files.

AI-Assisted Testing: Try It Before You Build On It

Once you find an API, testing it should be dead simple. That’s why we now support AI-assisted scenario testing:

Ask for specific use cases: > “Test placing an order and shipping it”
Automatically generate JSON payloads and simulate full workflows
Understand how resources interact, not just how they’re documented

This means consumers (and testers!) can evaluate APIs faster, reducing friction and support time.

Governing with AI — Turn That 100-Page Doc into Policy

Have you got API standards and security docs sitting in SharePoint? What if you could turn that into actual policy enforcement?

Now you can.

You can upload design guidelines or policy docs in plain English, and the AI will convert them into actionable governance rules—no need to write Spectral rules manually. You get compliance dashboards, alerts, and coverage across your entire API ecosystem.

Coming Soon: API Tools for Agents via MCP

Large Language Models and AI agents don’t just need APIs, they need them to be discoverable and usable. That’s where MCP (Model Context Protocol) comes in. We will provide native support so your APIs can:

Be consumed by agents directly from the gateway
Interact with LLMs using standard protocols
Play a first-class role in agent-driven architectures

In short: if you’re planning an AI-driven future, we’re building the infrastructure to support it.

Final Thoughts

We’ve been helping teams solve API problems for over a decade—across industries, clouds, and now AI. This release (including our new SaaS offering, Bijira) is a big leap in making complex API ecosystems more manageable, especially for developers who just want to build apps without fighting the infrastructure.

If you haven’t tried WSO2 API Manager lately, this is a good time to take it for a spin.

Got feedback? Questions? Want to share what you're building? Drop a comment — we’d love to hear from you.