APILens is now in public beta — Start monitoring for free →

apiLensapiLens
Log inSign up free
Developer-First · Public Beta

Full Visibility Into
Your API Health

Monitor API performance, catch errors instantly, and analyze latency — all in one powerful dashboard built for developers.

Start Monitoring FreeView Dashboard
apiLens — API Monitor
● Live
Total Requests
1.24M
+12% today
Avg Latency
48ms
−8ms vs yesterday
Error Rate
0.12%
−0.04% today
Uptime
99.98%
Last 30 days
Recent RequestsAuto-refresh
GET/api/v1/users20023msjust now
POST/api/v1/orders20167ms2s ago
GET/api/v1/products?limit=20200134ms5s ago
DELETE/api/v1/sessions/a8f3c120418ms8s ago
GET/api/v1/analytics/summary500892ms12s ago
PUT/api/v1/users/profile42245ms18s ago
1M+
API requests tracked
< 1ms
Instrumentation overhead
99.9%
Dashboard uptime
Free
No credit card needed

Features

Everything you need to own your API reliability

Built for developers who care about fast debugging, performance, and zero downtime.

Real-time Request Monitoring

Capture every API call the instant it happens — method, path, status code, and precise latency in one live feed.

Error Detection & Alerts

Get notified the moment any endpoint returns 4xx or 5xx responses. Catch production issues before your users file tickets.

Latency Analytics

Identify bottlenecks with P50, P95, and P99 percentile breakdowns. Know exactly which endpoints are slowing you down.

Full Request & Response Logs

Store complete request bodies, response payloads, and headers. Debug any issue with full context — no guessing.

Performance Dashboards

Visualize request volume, error rates, and latency trends over time. Share live dashboards with your team.

Team Collaboration

Share live dashboards with your team, manage role-based access, and keep everyone aligned on API health in one place.

Quick Setup

Up and running in 3 steps

01

Install the SDK

Add the APILens package to your Node.js, Python, or Go project with a single npm/pip/go install command.

02

Add one middleware

Drop in one line of middleware to your Express, Fastify, Django, FastAPI, or Go HTTP server.

03

See everything live

Open the APILens dashboard and watch your requests, errors, and latency appear in real-time — instantly.

Developer First

Add one line.
See everything.

Integrate APILens into your Python app in under 60 seconds. One pip install, one middleware line — no YAML, no config files.

Works with FastAPI, Django, Flask, Express, Go, and more
Automatic request / response capture
Zero impact on your API performance
Structured logs — JSON ready for any log sink
Python — FastAPI
Python
# Install
pip install apilens
# Add to your FastAPI app
from fastapi import FastAPI
from apilens import APILensMiddleware
app = FastAPI()
app.add_middleware(
APILensMiddleware,
api_key="your-api-key"
)
✓ Dashboard is live — that's it.

Pricing

Start free, scale as you grow

No credit card required. Cancel anytime.

Starter

Free forever, no credit card required

$0/ forever
Get started free
Up to 5 APIs monitored
7-day log retention
Request & response logging
1,000 requests / day
Email alerts
Community support
Most Popular

Cloud

Managed, hosted by APILens

$29/ month
Start free trial
Everything in Starter
Managed cloud hosting
30-day log retention
Team collaboration
Email & Slack alerts
Priority support

Enterprise

Custom for large teams

Custom
Contact us
Everything in Cloud
Unlimited log retention
SSO & SAML login
Dedicated infrastructure
SLA guarantee
Custom integrations

Stop flying blind on your APIs.

Join developers who use APILens to keep their APIs fast, reliable, and error-free.

Get started freeRead the docs