// API Explorer

The API Explorer for
interactive API documentation.

Auto-generated API documentation with try-it-out straight in the browser. OpenAPI, AsyncAPI, and GraphQL in one interactive surface — the modern Swagger UI alternative for API teams that want developer onboarding measured in minutes, not hours.

Supported formats 7 STANDARDS
REST, events, and GraphQL
OpenAPI · AsyncAPI · GraphQL · RAML · WSDL · Arazzo · Swagger
7
API formats
REST+Events+GraphQL
Paradigms
Developer experience PRODUCTIVITY
60% fewer support tickets
Live try-it-out · Auth management · Code samples
<2 min
Time-to-first-call
OAuth2 + JWT
Auth methods
7+
Code sample languages

// How it works

Try-it-out in three steps.

1
Load spec
2
Build request
3
Test live
01

Spec is loaded

OpenAPI, AsyncAPI, or GraphQL from the catalog or a Git repo. The API Explorer turns it into an interactive surface — endpoints, schemas, and examples.

02

Build the request visually

Configure parameters, headers, and request body in a form instead of a JSON editor. Auth tokens (OAuth2, JWT, API key) are managed per environment.

03

Inspect the live response

Send the request, see the response in real time — with syntax highlighting, status code, and headers. Copy a code sample in the language you need.

// Capabilities

What the API Explorer delivers.

Try-it-out

Test APIs straight in the browser.

No Postman, no curl terminal, no sandbox. The built-in try-it-out sends requests right from the documentation. Auth via API key, OAuth2, or JWT — parameters visual, response live, with syntax highlighting and status codes.

  • Visual request builder
  • Real-time responses with syntax highlighting
  • Automatic auth token management (API key, OAuth2, JWT)
  • Request history and favorites per user
app.api-portal.io/explorer/try-it-out
POST /api/v2/users

Headers

Authorization: Bearer eyJhbG...kpXVCJ9
Content-Type: application/json

Body

{
  "name": "Anna Berger",
  "email": "your@email.com",
  "role": "developer"
}
201 Created 87ms
{
  "id": 2048,
  "name": "Anna Berger",
  "email": "your@email.com",
  "role": "developer",
  "created_at": "2026-02-25T10:30:00Z"
}
AsyncAPI

Document event-driven APIs interactively.

Not just REST — the API Explorer supports AsyncAPI for event-driven architectures. Channels, topics, and message schemas for Kafka, MQTT, AMQP, and WebSocket-based APIs with publisher and subscriber flows visualized.

  • Channel and topic visualization
  • Message schema documentation with examples
  • Multi-protocol: Kafka, MQTT, AMQP, WebSocket
  • Publisher and subscriber flows
Validate spec quality upfront
app.api-portal.io/explorer/asyncapi
SUB user/signup
Kafka JSON

Neue Benutzerregistrierungen

PUB order/status
MQTT Avro

Bestellstatus-Aenderungen

SUB notification/push
AMQP JSON

Push-Benachrichtigungen

PUB chat/messages
WebSocket JSON

Echtzeit-Chat-Nachrichten

Kafka MQTT AMQP WebSocket
Code samples

Copy ready-to-use client code.

Auto-generated code samples for every language — cURL, JavaScript, Python, Go, Java, C#, PHP. Copy the full snippet with your parameters and auth headers straight into the project, no boilerplate to write by hand.

  • 7+ languages out of the box
  • Snippet with real parameters and auth
  • One-click clipboard copy
  • Also for AsyncAPI and GraphQL endpoints
app.api-portal.io/explorer
GET /api/v2/users
POST /api/v2/users
PUT /api/v2/users/{id}
DEL /api/v2/users/{id}
GET /api/v2/teams
POST /api/v2/teams
200 OK 42ms
{
  "id": 1284,
  "name": "Max M.",
  "role": "admin",
  "active": true
}

// Transformation

Static docs vs. interactive API Explorer.

The difference between a PDF manual and living API documentation — in concrete steps instead of feature lists.

Before Wiki, PDF, or static Swagger page

Docs slowly go stale

Every API deploy means manually updating pages. Reality: 60% of docs are out of date.

Context switch to test

Developer reads the wiki, switches to Postman, copies the URL, builds an auth token, runs the call. Five tools for one request.

No auth support

OAuth2 flows, JWT tokens, API keys per environment — all configured manually for every request.

REST only

AsyncAPI, GraphQL, or WSDL end up in separate viewers. Every format, every tool.

With API Explorer Interactive docs, in sync with the spec

Always in sync with the code

Spec update in the repo → Explorer shows the new endpoints on the next request. No manual refresh.

Read, test, copy — one surface

Read the endpoint, build the request, see the response, copy the code sample. No tool switching.

Centralized auth management

OAuth2, JWT, API key stored per user and environment. One click, done.

7 formats in one viewer

OpenAPI, AsyncAPI, GraphQL, WSDL, RAML, Arazzo, and Swagger — unified rendering.

// Impact

Measurable effect on developer experience.

Interactive documentation saves support time, accelerates onboarding, and turns API discovery into self-service. These are the numbers teams measure after rollout.

60%

Fewer support tickets

Developers find endpoints, parameters, and auth flows directly in the docs — no Slack message to the platform team.

<2 min

Time-to-first-API-call

From reading the docs to a successful call: under two minutes. Including auth token setup and parameter entry.

7

API formats in one UI

OpenAPI, Swagger, AsyncAPI, GraphQL, RAML, WSDL, and Arazzo — unified rendering instead of seven viewers.

// Terminology & differentiation

Also known as API playground, API sandbox, or interactive API reference.

Anyone searching for "try it out", "API try-out", "API playground", or "API sandbox" means the same function: testing APIs interactively in the browser instead of in Postman.

// Comparison

API Explorer instead of Swagger UI, Postman, or ReDoc.

Many API teams use Swagger UI, Postman collections, or ReDoc for API documentation. That doesn't scale — a dedicated API Explorer solves three core problems.

Swagger UI

Open-source viewer for OpenAPI, but not a portal. No access control, no auth management across environments, no multi-format support.

API Explorer: RBAC, auth management, 7 formats in one.

Postman & Insomnia

HTTP clients with collections, but not auto-generated from the spec. Collections go stale, token management gets messy beyond 50 APIs.

API Explorer: auto-generated from spec, centralized token management.

ReDoc & static docs

Beautiful rendering, but no try-it-out. Developers have to switch to Postman after reading — context switch instead of integrated workflow.

API Explorer: read, test, copy code in one surface.

// FAQ

Frequently asked questions about the API Explorer.

Short answers for API teams and enterprise architects.

Get in touch
An API Explorer is the interactive layer above an API specification. It turns OpenAPI, AsyncAPI, or GraphQL schemas into searchable, testable documentation — with try-it-out in the browser, code samples, and auth management. The modern evolution of classic Swagger UI integrations.
Swagger UI is an open-source viewer for OpenAPI documents. The API Explorer in API Portal goes beyond that: role-based access control, centralized auth token management across environments, multi-format support (OpenAPI, AsyncAPI, GraphQL, RAML, WSDL), and integration with the catalog, versioning, and audit logs.
Yes. The API Explorer supports every common authentication scheme: API key, basic auth, OAuth2 (authorization code, client credentials), and JWT Bearer. Tokens are stored securely per user and environment — no manual copy-paste into a header field.
Supported formats are OpenAPI 3.x, Swagger 2.0, AsyncAPI 2.x, GraphQL, RAML, WSDL/SOAP, and Arazzo. Each format gets a native interactive rendering — REST endpoints with try-it-out, event channels with publisher/subscriber flows, GraphQL with a schema explorer.
Yes. White-label options let you adapt the API Explorer fully to your branding — logo, colors, typography, and a custom domain. Your API portal becomes a native developer portal in your corporate design.
Swagger UI is an open-source renderer that turns OpenAPI specifications into interactive documentation. You feed it a YAML or JSON spec and get back endpoints, schemas, and a try-it-out in the browser. The API Explorer in API Portal is a modern Swagger UI alternative — same idea, but with auth token management, role-based rights, versioning, and an integrated API catalog. Swagger UI renders a file. The API Explorer is a complete developer portal.
API documentation is no longer written in Word. You write a spec — OpenAPI for REST, AsyncAPI for events, GraphQL for schemas — and the API Explorer turns it into searchable Swagger documentation with try-it-out automatically. Three steps: commit the spec to the repo. Link it in the portal or upload via CI. Swagger docs are live, versioned, always in sync with the code. Anyone setting out to build API documentation today starts with the spec — everything else builds on top.

// Discover more

Related features.

// Deep dive

Background articles on the API Explorer.

From format choice to interactive documentation to discovery integration.

Ready for interactive API docs?

Experience the platform built for modern API management.