MCP.Market

Circle MCP server

online · 100% uptime
by circle.so·so.circle/circle·v1.0.0
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B77/100grade B
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Safety scan
B77/100

full report

Adoption
New

Little public usage data yet

Reviews

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If you have run it, two minutes of your experience saves the next person an afternoon.

Circle tools

Tool list not cached yet. `describe` through the gateway fetches it live.

Public scan report

scanner v0.1.10 · 2026-10-14 · same rubric, same numbers if you re-run it

1 low
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 129ms (auth required)20/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualityOAuth resource metadata advertised on 40115/15
  • Maintenanceno repository listed3/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10

Findings (1)

  • lowNo source repository listedmaint.no-repo
Overall 77/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Circle compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
77/100
higher than 50% of 48,255 servers
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
97 ms
faster than 85% of 30,031 servers

Install Circle in Claude Code, Cursor or VS Code

claude mcp add --transport http circle https://app.circle.so/api/mcp
Add to Cursor

Circle: common questions

Is Circle MCP server safe?
Mostly: it is graded B (77/100). Read the Circle safety report
How do I install Circle?
It runs remotely at app.circle.so. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Circle need an API key?
No key to paste: it signs you in with OAuth when your client connects.
Is Circle maintained?
The latest release is v1.0.0.
Is Circle up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Circle?
Servers from other publishers that do the same job: Domain Liveness MCP server and Business Contact Finder MCP server.
How does Circle compare with other MCP servers?
safety score 77/100 (higher than 50% of 48,255 servers); uptime 100% (of our recent checks; the typical remote server answers 100%); response time 97 ms (faster than 85% of 30,031 servers). Full comparison.

Alternatives to Circle

Same job from other publishers: the closest match first, then the best rated.