​
Installation

Install the Koa.js integration package: 
npm install @apitraffic/koa
Node 18+ required

​
Basic Setup

Add ApiTraffic middleware to your Koa.js application: 
const Koa = require('koa');
const apiTraffic = require('@apitraffic/koa');

const app = new Koa();

// Add ApiTraffic middleware
app.use(apiTraffic({
  token: process.env.API_TRAFFIC_TOKEN,
  bucket: process.env.API_TRAFFIC_BUCKET
}));

// Your existing routes
app.use(async (ctx, next) => {
  if (ctx.path === '/api/users') {
    ctx.body = { users: [] };
  } else {
    await next();
  }
});

app.listen(3000);

​
Configuration Options

app.use(apiTraffic({
  token: 'your-api-token',           // Required
  bucket: 'your-bucket-id',          // Required
  ingestHost: 'ingest.apitraffic.io', // Optional
  apiHost: 'api.apitraffic.io',       // Optional
  interceptOutbound: true,            // Optional: Monitor outbound requests
  debug: false                        // Optional: Enable debug logging
}));

​
Configuration Table

OptionEnvironment VariableRequiredTypeDescription
tokenAPI_TRAFFIC_TOKENYesStringIngest token from your ApiTraffic account
bucketAPI_TRAFFIC_BUCKETYesStringBucket ID for data organization
interceptOutboundAPI_TRAFFIC_INTERCEPT_OUTBOUNDNoBooleanMonitor outbound HTTP requests (default: true)
debugAPI_TRAFFIC_DEBUGNoBooleanEnable debug logging (default: false)

​
Advanced Usage

​
Custom Tagging

Add custom tags to requests for better organization and searchability: 
const Router = require('@koa/router');
const router = new Router();

router.get('/api/users/:id', async (ctx) => {
  // Add custom tags
  apiTraffic.tag('user_id', ctx.params.id);
  apiTraffic.tag('endpoint', 'get_user');
  apiTraffic.tag('version', 'v1');
  
  const user = await getUserById(ctx.params.id);
  ctx.body = { user };
});

app.use(router.routes());

​
Request Tracing

Add trace messages for debugging and monitoring: 
router.post('/api/users', async (ctx) => {
  apiTraffic.trace('Starting user creation process');
  
  try {
    const user = await createUser(ctx.request.body);
    apiTraffic.trace('User created successfully');
    ctx.body = user;
  } catch (error) {
    apiTraffic.trace(`User creation failed: ${error.message}`);
    throw error;
  }
});

​
Error Handling

ApiTraffic automatically captures errors, but you can add additional context: 
app.on('error', (err, ctx) => {
  // Add error context
  apiTraffic.tag('error_type', err.name);
  apiTraffic.trace(`Error occurred: ${err.message}`);
  
  console.error('Server error:', err);
});

// Error handling middleware
app.use(async (ctx, next) => {
  try {
    await next();
  } catch (err) {
    ctx.status = err.statusCode || err.status || 500;
    ctx.body = { error: 'Internal Server Error' };
    ctx.app.emit('error', err, ctx);
  }
});

​
Environment Variables

Configure using environment variables:
.env
API_TRAFFIC_TOKEN=your-api-token
API_TRAFFIC_BUCKET=your-bucket-id
API_TRAFFIC_INGEST_HOST=ingest.apitraffic.io
API_TRAFFIC_API_HOST=api.apitraffic.io
API_TRAFFIC_INTERCEPT_OUTBOUND=true
API_TRAFFIC_DEBUG=false

​
Middleware Order

Place ApiTraffic middleware early in your middleware stack: 
const Koa = require('koa');
const bodyParser = require('koa-bodyparser');
const cors = require('@koa/cors');
const apiTraffic = require('@apitraffic/koa');

const app = new Koa();

// Error handling middleware (first)
app.use(async (ctx, next) => {
  try {
    await next();
  } catch (err) {
    ctx.status = 500;
    ctx.body = { error: 'Internal Server Error' };
  }
});

// CORS middleware
app.use(cors());

// Body parser middleware
app.use(bodyParser());

// ApiTraffic middleware (after body parsing)
app.use(apiTraffic({
  token: process.env.API_TRAFFIC_TOKEN,
  bucket: process.env.API_TRAFFIC_BUCKET
}));

// Your application routes
app.use(router.routes());

​
TypeScript Support

The package includes TypeScript definitions: 
import Koa from 'koa';
import apiTraffic from '@apitraffic/koa';

const app = new Koa();

app.use(apiTraffic({
  token: process.env.API_TRAFFIC_TOKEN!,
  bucket: process.env.API_TRAFFIC_BUCKET!,
  interceptOutbound: true
}));

​
With Koa Router

Using ApiTraffic with @koa/router: 
const Koa = require('koa');
const Router = require('@koa/router');
const apiTraffic = require('@apitraffic/koa');

const app = new Koa();
const router = new Router();

// Add ApiTraffic middleware
app.use(apiTraffic({
  token: process.env.API_TRAFFIC_TOKEN,
  bucket: process.env.API_TRAFFIC_BUCKET
}));

// Define routes
router.get('/api/users', async (ctx) => {
  apiTraffic.tag('endpoint', 'list_users');
  ctx.body = { users: [] };
});

router.post('/api/users', async (ctx) => {
  apiTraffic.tag('endpoint', 'create_user');
  apiTraffic.trace('Creating new user');
  
  const user = await createUser(ctx.request.body);
  ctx.body = user;
});

app.use(router.routes());
app.use(router.allowedMethods());

​
Security Features

​
Data Redaction

ApiTraffic automatically redacts sensitive data based on your account settings. No code changes required - configure redaction rules in your ApiTraffic dashboard.

​
Request Exclusions

Exclude specific endpoints from monitoring by configuring exclusion rules in your ApiTraffic account. Common exclusions include:
  • Health check endpoints
  • Static asset requests
  • Internal monitoring endpoints

​
Troubleshooting

Ensure ApiTraffic middleware is placed before your route handlers and after body parsing middleware.
Verify that API_TRAFFIC_TOKEN and API_TRAFFIC_BUCKET are set in your environment.
Set interceptOutbound: true in your configuration to enable outbound request monitoring.
Make sure you’re using async/await syntax and that ApiTraffic middleware is properly registered.

​
Debug Mode

Enable debug mode to see detailed logging: 
app.use(apiTraffic({
  token: process.env.API_TRAFFIC_TOKEN,
  bucket: process.env.API_TRAFFIC_BUCKET,
  debug: true
}));

​
Sample Application

A complete working example is available in the GitHub repository.

​
Next Steps

Dashboard

View your API traffic data and analytics

Workflow Engine

Create automated workflows based on your API data