QAmcp

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Directory / PostData

PostData

Q: Is PostData MCP server safe?

QAmcp's test on 28 Oct 2026: No hidden instructions were found in its tool descriptions. Its error messages showed no secrets or internal details. 5 of its 6 tools are labeled read-only; the others may change or send things. Overall it scored 93/100 on 28 Oct 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by postdata.cloud · https://api.postdata.cloud/mcp

No-signup IoT backend: device names, sensor readings, history and live charts. No API key needed.

6 tools✓ no account neededPricing: not listed

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93 /100

PASS · WITH NOTES

11 of 11 checks · 28 Oct 2026

Is PostData MCP server safe?

No hidden instructions were found in its tool descriptions.
Its error messages showed no secrets or internal details.
5 of its 6 tools are labeled read-only; the others may change or send things.
Overall it scored 93/100 on 28 Oct 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

6 tools, in the server's own words.

new_device_nameread-only

Get an unused device name (like amber-otter-4821) with its ingest, read, live-stream and chart URLs.

publish_reading

Store one reading for a device, exactly as POST /add/{device} would.

get_latestread-only

The most recent reading from a device, when it arrived (unix seconds) and how long ago, plus its chart URL.

get_historyread-only

Numeric history for a device over the last N hours (up to 2208, ~92 days): min/max/mean/first/last per metric, and a downsampled series where each point is the…

wait_for_readingread-only

Wait until a device sends a new reading, then return it.

list_recent_devicesread-only

The 20 most recently active public devices with their latest readings.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Every tool is described
1 warning
- !wait_for_reading: Inputs with no description: timeout_seconds
note
✓
ConnectsConnected in 274 ms
pass
✓
Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
pass
✓
Lists its toolsFound 6 tools
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No hidden instructionsNo hidden instructions found in tool descriptions
pass
✓
Tools work with good inputs
All good
- ✓get_latest: Answered with an error, probably because of our sample input: {"error":"device does not exist","hint":"Nothing has been sent to this device yet, or it has been idle for more than ~92 days. Send a readi…
- ✓get_history: Answered with an error, probably because of our sample input: {"error":"device does not exist","hint":"Nothing has been sent to this device yet, or it has been idle for more than ~92 days. Send a readi…
- ✓list_recent_devices: Worked (151 ms)
- –new_device_name: Not run: labeled read-only, but its name starts with "new", which usually means it changes something. Skipped to be safe: if it only reads, a clearer name helps AI apps too, or test again with --owner
- –publish_reading: Not run: labeled as changing data
- –wait_for_reading: Not run: labeled read-only, but its description says "sends", which usually means it changes something. Skipped to be safe: if it only reads, a clearer description helps AI apps too, or test again with --owner
pass
✓
Bad inputs give a clean error
All good
- ✓get_latest: Refused missing required input "device" with a clear error
- ✓get_latest: Refused wrong type for "device" with a clear error
- ✓get_history: Refused missing required input "device" with a clear error
- ✓get_history: Refused wrong type for "device" with a clear error
pass
✓
Fast enough
All good
- ✓Connecting took 274 ms
- ✓Listing tools took 181 ms
- ✓Average tool answer: 177 ms
- ✓get_latest: Slowest tool: get_latest (190 ms)
pass
✓
No secrets leakedChecked 6 error messages: no secrets or internal details
pass
✓
Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://api.postdata.cloud/mcp

Show this score on GitHub

Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.

[![QAmcp score](https://qamcp.dev/s/cloud-postdata-postdata.svg)](https://qamcp.dev/s/cloud-postdata-postdata.html)

Score over time

28 Oct 202693

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use PostData, signed in with GitHub, one per person. Reviews never change the score.

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