Directory / Screwtape.ai

Screwtape.ai

Q: Is Screwtape.ai MCP server safe?

QAmcp's test on 24 Oct 2026: No hidden instructions were found in its tool descriptions. Its error messages showed no secrets or internal details. 3 of its 6 tools are labeled read-only; the others may change or send things. Overall it scored 70/100 on 24 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 screwtape.ai · https://screwtape.ai/mcp

Independent pass/fail/retry judge and false-consensus check for agent outputs, with signed receipts.

6 tools✓ no account neededPricing: on their site

See pricing →Visit website

70 /100

FAIL

10 of 10 checks · 24 Oct 2026

Is Screwtape.ai MCP server safe?

No hidden instructions were found in its tool descriptions.
Its error messages showed no secrets or internal details.
3 of its 6 tools are labeled read-only; the others may change or send things.
Overall it scored 70/100 on 24 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.

judgeread-only

An independent pass/fail/retry verdict on ONE agent output.

check_duplicate_invoice

Duplicate invoice check before an agent pays.

consensusread-only

False-consensus check for 2 to 16 answers to the same task.

get_api_key

Create a free Screwtape.ai API key (100 calls per UTC day) with no human approval.

buy_packread-only

Return the x402 payment requirements for a Starter ($40, 10000 calls) or Builder ($175, 50000 calls) prepaid pack, plus how to pay with USDC on Base or Solana.

publish_receipt

Publish a signed receipt you own so a public page and a Screwtape Verified badge can link to that one verdict.

Test results

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

✕
Tools work with good inputs
1 failed
- ✕judge: Crashed: the connection was cut before an answer
- –check_duplicate_invoice: Not run: labeled as changing data
- –get_api_key: Not run: labeled as changing data
- –buy_pack: Not run: labeled read-only, but its name starts with "buy", 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_receipt: Not run: labeled as changing data
- and 1 more
fail
✕
Bad inputs give a clean error
2 failed
- ✕judge: Crashed on missing required input "task"
- ✕judge: Crashed on wrong type for "task"
- and 2 more
fail
!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
✓
ConnectsConnected in 594 ms
pass
✓
Lists its toolsFound 6 tools
pass
✓
Every tool is describedAll 6 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No hidden instructionsNo hidden instructions found in tool descriptions
pass
✓
Fast enough
All good
- ✓Connecting took 594 ms
- ✓Listing tools took 93 ms
- ✓Average tool answer: 190 ms
- ✓consensus: Slowest tool: consensus (190 ms)
pass
✓
No secrets leakedChecked 6 error messages: no secrets or internal details
pass
–
Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://screwtape.ai/mcp

Score over time

24 Oct 202670

One test so far. New tests will show here.

Reviews

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

Is this your server?

Soon you can claim this page: re-test it from here, reply to results, and show a "Tested by QAmcp" badge.

Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works