One line of code.
Complete visibility.
Track every API call, token, and agent run. See exactly who's using what. Bill when you're ready.
Free pilot · Unlimited events · No credit card
Track anything metered
Every event captures who, what, and how much. Full visibility across your entire product.
API calls
HTTP requests, RPC calls, and webhook deliveries across any endpoint.
LLM tokens
Input and output tokens across any model provider. Per-token cost attribution.
Tool invocations
Function calls, plugin executions, and third-party tool usage by agents.
Agent runs
End-to-end workflow executions with step-level cost and latency tracking.
Compute time
CPU and GPU seconds, billed to the millisecond. Supports duration metering.
Custom meters
Define any unit type. Attach metadata for filtering, grouping, and analytics.
Built to track every event
High-frequency usage metering backed by Fastify, Redis, and PostgreSQL.
40k/sec
Event ingestion throughput
<1ms
Event capture latency
10+
Event types tracked
1k/min
Webhook delivery rate
Sub-cent
Metering precision
5x
Auto-retry with backoff
Live in 5 minutes
From signup to tracking. No approvals, no waiting.
Get your API key
Sign up and copy your key. Instantly available in your dashboard.
Add one line
npm install, import, call trackUsage. That's the entire integration.
See it live
Usage appears in your dashboard immediately. Billing comes when you're ready.
Your command center
Real-time visibility into every usage event, customer, and pending settlement.
Total Revenue
$12,847.32
USD
Total Charges
1,247
All time
Customers
284
Active
Webhooks
Healthy
3 configured
Recent Usage Events
View all in Audit →| Customer | Usage Type | Description | Idempotency Key | Quantity | Time |
|---|---|---|---|---|---|
| cust_7a2b3c | tokens | GPT-4 completion | req_8f2a1b | 2,847 | 2m ago |
| cust_9d4e5f | api_calls | Search API | req_3c7d9e | 156 | 5m ago |
| cust_1h2i3j | rpc_calls | eth_call | req_6k4m2n | 1,024 | 8m ago |
| cust_4k5l6m | tokens | Claude completion | req_1p5q8r | 3,521 | 12m ago |
| cust_7n8o9p | tool_calls | Web scraper | req_9s3t7u | 47 | 15m ago |
Built for usage-based products
AI Agents
Tool calls, execution runs, tokens
AI Workflows
Pipeline steps, model inference
RPC Providers
Per-call billing, multi-chain
Developer APIs
Sub-cent API call metering