Stupid. Simple. Sensor data.

The no-signup way to put your device's data online. One request in, live charts out.

Get Started Explore 

                        curl -X POST http://api.postdata.cloud/add/home-geo-station
-d '{"temp": 20, "hum": 77}'
TEMP
HUM

Less is More.

Why should you commit to a bulky, hard-to-configure IoT platform before you really need it?

  • No signup. No account, no API key, no credit card. Pick a device name and POST.
  • Plain HTTP welcome. No TLS handshakes, no embedded root certificates, no expiring certs bricking your firmware. http:// works on purpose.
  • No SDK. If your device can make an HTTP request — even a bare GET with query params — it can use PostData.
  • Charts included. Every device gets a live-updating page with its history. Share the link.

Why do all this?

  1. Create a cloud account.
  2. Set up an IoT Core endpoint to receive data.
  3. Register the device and provision its certificates.
  4. Embed and rotate those certificates in firmware.
  5. Create an ingest rule to route data to a storage service.
  6. Stand up a time-series database.
  7. Configure a dashboard tool to visualize the data.
  8. Set up security and access control for all of the above.

While you can just do this!

  1. Send your data to PostData
  2. Visualize it!

The whole API, honestly.

# send a reading (POST some JSON, or just GET with query params)
curl -X POST http://api.postdata.cloud/add/my-sensor -d '{"temp": 21.5, "hum": 60}'
curl "http://api.postdata.cloud/add/my-sensor?temp=21.5&hum=60"

# read the latest value
curl http://api.postdata.cloud/last/my-sensor

# read the history (last 24 hours)
curl http://api.postdata.cloud/past/my-sensor/24

# watch it live
websocat wss://api.postdata.cloud/live/my-sensor

That's it. Works over http:// and https:// alike — your firmware picks. Full docs here.

Free. No Credit Card, No Sign-up!

The deal is simple:

  • Unlimited devices — any name that's free is yours
  • Up to 10 metrics per device
  • 1 message per 30 seconds per device
  • ~3 months of history (older data ages out)
  • Everything is public — anyone with the name can read (or write!) it

Need private devices or longer retention? That may come later. For now PostData is a free public utility, like a pastebin for sensor data.

Check Documentation

Questions?

What is PostData?

PostData is the easiest way to put sensor readings online: send an HTTP request with your numbers, and PostData stores them, charts them, and gives you a simple API and a live page to share. No account needed.

Is this like dweet.io?

Yes — PostData is a spiritual successor to dweet.io, which shut down. Same zero-friction idea, plus history and built-in live charts, running on Cloudflare's edge network.

Why plain HTTP? Isn't HTTPS better?

HTTPS is great — and supported — but TLS is genuinely painful on constrained microcontrollers: certificate stores, expiring roots, slow handshakes, RAM. PostData accepts plain HTTP on purpose so an ESP8266 or a bare AT-command modem can publish without ceremony. Remember everything on PostData is public anyway.

What kind of data can I send?

Any numeric metrics — weather sensors, server stats, plant moisture, whatever — up to 10 metrics per device. Short text values work too (they keep only the last value, no history).

How long do you keep my data?

Numeric history is kept for roughly 92 days. The latest value sticks around for as long as the device keeps posting. If a device goes quiet for a few months it eventually disappears from the explore page.

Can anyone see (or overwrite) my device?

Yes. Devices are public and first-come-first-served — anyone who knows the name can read it, and anyone can post to it. Use a hard-to-guess name (a UUID works nicely) if you want practical obscurity. Claimable private devices may come later.

Who runs this?

PostData is a labor of love built on Cloudflare Workers — the whole platform is a single Worker, a database, and one Durable Object per device. Questions? info@postdata.cloud