Pre-launch · being built in the open
Send it to the lad.
The simplest way to put a sensor on the internet. One HTTP line from any device. A live chart you can share with a link, no account needed to view.
No product yet — this is a waitlist. One email when it opens, then nothing.
How it will work
Three steps, and the third one is optional.
-
1
Send
One HTTP GET from anything that can reach the internet — ESP32, ESP8266, Raspberry Pi, a shell script, a PLC, a phone. No SDK, no client library, no auth header, no MQTT broker to stand up.
GET api.postlad.com/u?k=KEY&f1=23.5&f2=61 -
2
Watch
The stream gets a live page the moment the first reading lands. Current value, chart, last-seen time. Nothing to lay out, nothing to configure, no dashboard to build first.
postlad.com/s/greenhouse -
3
Share & embed
Send anyone the link — viewers need no account, no login, no app. Or drop the chart into a blog post, a lab wiki, a class page or a README with one line of HTML.
<iframe src="postlad.com/e/greenhouse">
Why bother building this
Because free tiers for hobbyists have quietly collapsed. A data logger that forgets everything after a day isn’t a data logger — and a season of greenhouse readings currently has nowhere free to live.
| Platform | Free-tier history | Device can write with a plain HTTP GET |
|---|---|---|
| Postlad planned | 30 days raw + 12 months hourly | Yes |
| Arduino Cloud | 1 day | not compared |
| Blynk | 1 week | not compared |
| Adafruit IO | 30 days | No — POST plus an auth header |
| ThingSpeak | Works, but throttled to one write per 15 seconds, and the free licence is non-commercial only | Yes |
| Grafana Cloud | not compared | No — a device can’t write to it at all |
Last checked August 2026. The Postlad row describes what’s being built, not something you can use today. Cells marked not compared are things we haven’t verified ourselves, so we don’t claim them — if you know better, tell us and we’ll fix the row.
The free tier, in full
No trial clock, no credit card, no “contact us”. This is the plan for launch, written down now so it can be held against us later.
- 2 streams
- One update every 15 seconds
- 30 days raw history + 1 year of hourly history
- Public share links — viewers need no account
- Embeds for blogs, wikis and class pages
- CSV export
Your data is yours. Export everything, anytime.
Get early access
Postlad isn’t open yet. Leave an email and you’ll get one message when it is — plus the free tier locked in as written above. No newsletter, no drip campaign, no passing your address to anyone.