Live usage tracking, per client, per key

Know exactly who's calling your API — and how much.

UsageWatch counts every request your API receives, breaks it down by developer, client app and endpoint, and enforces monthly quotas automatically — so you stop finding out about abuse from your hosting bill.

Start free — 1,000 calls/mo See the docs

✓ No credit card

✓ 2-line integration

✓ PostgreSQL under the hood

// Program.cs — drop-in middleware
builder.Services.AddUsageWatch(options =>
{
    options.ApiKey = "uw_live_••••••••••••";
    options.IngestBaseUrl = "https://usagewatch.yourdomain.com";
});

app.UseUsageWatch();  // that's it — every request is now tracked

// ...or call the REST endpoint from any language
POST /api/ingest/usage
X-Api-Key: uw_live_••••••••••••

{
  "endpoint": "/v1/orders",
  "method": "POST",
  "statusCode": 201,
  "responseTimeMs": 84
}

Built for API teams

Everything you need to stay ahead of usage, not behind it

⚡

Two ways to track

Drop in the ASP.NET Core middleware for automatic, zero-code tracking, or POST straight to the REST endpoint from any stack.

👥

Per-client breakdowns

Issue a separate API key per developer or customer and see exactly who's driving your traffic — and your bill.

🚦

Real quota enforcement

Set a monthly call limit per project. Warn softly, or return a hard HTTP 429 the moment a client goes over.

📊

Live dashboard

Daily call trends, top endpoints, error rates and response times — all queried straight from Postgres, no separate analytics stack.

🔑

Scoped, revocable keys

Every key is hashed at rest and shown once. Revoke a compromised or offboarded client's key in one click.

🐘

Your data, your Postgres

Self-host on your own PostgreSQL instance. No vendor lock-in, no usage data leaving your infrastructure.

How it works

Three steps, five minutes

Create a project

Issue keys per client

Add each developer or customer as a client app, then generate a key for them.

Watch the dashboard

Install the middleware or call the REST endpoint — usage shows up in real time.

Stop guessing who's using your API

Free forever for small projects. Upgrade only when your traffic does.

Create your free account