Directory / Plith Rigor

Plith Rigor

Q: Is Plith Rigor MCP server safe?

QAmcp's test on 25 Oct 2026: No hidden instructions were found in its tool descriptions. Its error messages showed no secrets or internal details. 3 of its 4 tools are labeled read-only; the others may change or send things. Overall it scored 73/100 on 25 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 plith.ai · https://plith.ai/api/mcp/rigor

Structured multi-step workflows that produce production-quality deliverables. Plan any task free.

4 tools✓ no account neededPricing: on their site

See pricing →Visit website

73 /100

FAIL

11 of 11 checks · 25 Oct 2026

Is Plith Rigor MCP server safe?

No hidden instructions were found in its tool descriptions.
Its error messages showed no secrets or internal details.
3 of its 4 tools are labeled read-only; the others may change or send things.
Overall it scored 73/100 on 25 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

4 tools, in the server's own words.

rigor_planread-only

Before executing a complex task, get a structured workflow plan with per-step cost estimates.

rigor_execute

Execute a structured workflow end-to-end.

rigor_statusread-only

Check the status of a running or completed Rigor workflow.

rigor_workflowsread-only

List and search Rigor workflows for your organization, with filtering and pagination.

Test results

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

✕
Tools work with good inputs
2 failed
- ✕rigor_status: Its reply breaks the MCP rules, so AI apps can't read it: it promised a structured answer (outputSchema) but sent none
- ✕rigor_workflows: Its reply breaks the MCP rules, so AI apps can't read it: it promised a structured answer (outputSchema) but sent none
- –rigor_execute: Not run: labeled as changing data
- and 1 more
fail
✕
Bad inputs give a clean error
3 failed
- ✕rigor_status: Broke the MCP rules on missing required input "workflow_id": it promised a structured answer (outputSchema) but sent none
- ✕rigor_status: Broke the MCP rules on wrong type for "workflow_id": it promised a structured answer (outputSchema) but sent none
- ✕rigor_workflows: Broke the MCP rules on wrong type for "status": it promised a structured answer (outputSchema) but sent none
- and 2 more
fail
!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2024-11-05). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Resources and prompts work
2 warnings (2 resources, 2 prompts)
- !try-rigor-free: Doesn't complain when the required input task_description is missing.
- !plan-and-execute: Doesn't complain when the required input task_description is missing.
- and 3 more
note
✓
ConnectsConnected in 497 ms
pass
✓
Lists its toolsFound 4 tools
pass
✓
Every tool is describedAll 4 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 497 ms
- ✓Listing tools took 87 ms
- ✓Average tool answer: 813 ms
- ✓rigor_plan: Slowest tool: rigor_plan (813 ms)
pass
✓
No secrets leakedChecked 8 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://plith.ai/api/mcp/rigor

Score over time

25 Oct 202673

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Plith Rigor, 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