TestLens

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Other

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://testlens.bigfloppy.net/mcp

claude mcp add --transport http testlens https://testlens.bigfloppy.net/mcp

{
  "mcpServers": {
    "testlens": {
      "url": "https://testlens.bigfloppy.net/mcp"
    }
  }
}

{
  "servers": {
    "testlens": {
      "type": "http",
      "url": "https://testlens.bigfloppy.net/mcp"
    }
  }
}

https://testlens.bigfloppy.net/mcp

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

• testlens_mutate

  Mutation-test Python code: submit the module code and unittest test cases; TestLens generates small mutants (flipped comparisons, swapped operators, inverted booleans), runs the tests against each and reports the mutation score plus every SURVIVOR - behaviour the tests do not che

• testlens_health

  Check the TestLens API is up. Takes no arguments.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain testlens.bigfloppy.net (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 690 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 2 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

• More stars than 0% of the other 32706 servers in this category
• Published to the registry more recently than 74% of the other 32706 servers in this category
• Basic checks equal to or better than 100% of the other 32706 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

{"mcpServers": {"testlens": {"command": "python3", "args": ["/path/to/mcp_server.py"]}}}