io.github.operantlabs/operant-mcp
operant
Security testing MCP server for penetration testing, forensics, and vulnerability assessment
alive probed 2026-10-15
51tools
17ktokens in Claude Opus 5.5
18ktokens in Claude Code
8.6 %of a 200k context window
9.6ko200k_base estimate
436 msto initialize
29 msto list tools
- Run it
- npx -y operant-mcp@1.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- operant 1.0.0
- Capabilities
- prompts, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/operantlabs/operant-mcp
- Registry
- active, updated 2026-03-25 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| auth_bruteforce | 381 | 4 % |
| file_upload_test | 368 | 4 % |
| role_escalation_test | 358 | 4 % |
| idor_test | 350 | 4 % |
| graphql_find_hidden | 301 | 3 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.operantlabs/operant-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.