If you can send a request in Postman, you can monitor it. Pick the method, paste the URL, and choose the checks: the status code, how fast it responds, and the fields in the body. Acumen Logs runs them on a schedule from the regions you choose. When an API goes down, slows 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. A 200 only means the server answered. API monitoring checks the body is the right data, in the right shape, and fast enough. An empty product list or a renamed price field still fails the run.
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. A customer signs in, then places an order. Chain those requests into one journey, save a token or an order ID 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 and combine them. A 200 with a missing field still fails.
Allow a range, or exactly the codes you expect. Anything else fails the run.
Set a limit on how long a response may take. If it is slower than that, the run fails. 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, a description of the shape the response must have. A renamed or missing field fails the run 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, which is what you need when something breaks. Latency, the time the API takes to respond, 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 time limit, and only from Frankfurt.
API checks often touch payment, account, and partner endpoints. Mask sensitive fields, allow-list the monitoring IPs, choose where the check runs, and keep an activity log. These controls do not make a production check risk-free.
Mask sensitive fields before logs are exported or alerts are sent.
Add the monitoring IP addresses to your gateway or firewall, so a check can reach an internal API.
Pick the region the check runs from. Where the request runs is not a promise about where the logs are stored.
The activity log shows who changed a monitor and when.
Use a test account with limited permissions. A check can still change data if the account you give it is allowed to.
Alerts arrive with the endpoint, the failed check, and the region. The person who looks after the site can start on the failure, instead of hunting for which call broke.
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 a site or a health endpoint, on the interval you set. It does not read the body the way an API check does.
Uptime monitoring →A real browser walks login and checkout, and keeps the screenshot when a step breaks. A green API is not the same as a customer finishing checkout.
Synthetic monitoring →Background jobs and queues ping in when they finish. Silence is the alert. An API check will not notice a job that never ran.
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.
Solo also includes 15 API monitors. Pro includes 25, and Pro Plus includes 40. Free cannot run a check more often than every 24 minutes. Solo and Essentials can run every 10 minutes, Pro every 5, and Pro Plus every minute.
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 →Check availability, the time to respond, and the body. When a check fails, the alert goes to your developer, agency, or the person who looks after the site. Acumen Logs tells you. It does not fix the API.
