If you can send a request in Postman, you can monitor it. Pick the method, paste the URL, tick the checks that matter, and Acumen Logs runs it on a schedule from the regions you choose. When an API goes down, or quietly starts returning the wrong data, you hear about it first.
No credit card. No scripts required.
A ping tells you an API responded. Your app needs it to respond with the right data, in the right shape, fast enough. That is the part API monitoring checks.
GET /products returns 200 in 140 ms.
The body is an empty list. Every product page now says “out of stock”.
POST /auth/token returns 200.
The token works, but the next call to /orders returns 401. Checkout is broken for every customer.
GET /prices returns 200.
A release renamed price to amount. The mobile app shows £0.00 on every item.
Most APIs are a conversation, not a single call. Chain requests into one journey, save a value from one response, and use it in the next. It looks like a Postman collection, and it runs on a schedule.
Pull an ID, a token, or any field out of a response and drop it into the next URL, header, or body as {{variable}}.
API keys in headers, bearer tokens fetched by a pre-request script, basic auth, or a client certificate for mutual TLS.
Most journeys need none. When one does, add custom logic for signatures, calculations, or anything unusual.
Pick the checks from a list. Combine them, so a 200 with a missing field still fails.
Allow a range, or exactly the codes you expect. Anything else fails the run.
Fail when a response is slower than your SLA, so slow is treated as broken.
Check that a field exists, or equals the value it should. The wrong data fails, even with a 200.
Require a word or phrase in the response, or fail when an error message appears.
Upload a JSON schema to hold the API to its contract. Catch a renamed or missing field the day it ships.
Confirm cache headers, version numbers, and security headers are still there after every release.
Each run keeps the full request and response. Latency is charted over time and by region, so a slow day or a slow city is obvious at a glance.
The payment went through, but nearly four times slower than the SLA, and only from Frankfurt.
API checks often touch payment, account, and partner endpoints. These controls keep test traffic contained and logs clean.
Mask sensitive fields before logs are exported or alerts are sent.
Add the monitoring IPs to your gateway or firewall so internal APIs can be checked too.
Pick execution locations that match your data residency rules.
The activity log shows who changed a monitor and when.
Best practice: use a test account with scoped permissions, so monitoring traffic can never change live data.
Alerts arrive with the endpoint, the failed check, and the region, so whoever picks it up can start fixing instead of investigating.
Check failed: body.status expected "paid", got "pending". 2 runs in a row, Frankfurt and London.
API monitoring sits beside the rest of Acumen Logs, so one tool covers the whole stack.
A simple HTTP check for every site and health endpoint, every minute.
Uptime monitoring →A real browser walks login and checkout, and keeps the screenshot when a step breaks.
Synthetic monitoring →Background jobs and queues ping in when they finish. Silence is the alert.
Heartbeat monitoring →Show customers and partners the health of your API on a page that updates itself.
Status pages →No credit card to start, and you can cancel any time.
API monitor limits for each plan, plus Solo and Pro, are on the pricing page.
See every plan →“They played a crucial role in helping us quickly onboard several hundred sites for both uptime and synthetic monitoring, providing invaluable support every step of the way.”
“The company I work for needed to transition to a new monitoring system for the many ecommerce sites we support, and Acumen has stepped in and filled the void in a terrific way.”
“Love the support we got from Acumen Logs! Highly recommended.”
Free website testing tools, monitoring products, and practical engineering guides.
Create complete synthetic journeys from a simple prompt.
Explore builder →Describe it, review it, save it. Then copy it for every environment and every site that needs it.
