Fittest
Three ML interatomic potentials check a molecule: trust (Beta-posterior score, 90% CI) or DFT.
What it does
Fittest is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
No capability identified yet from its description.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 1h ago (live check)Hosted endpoint
https://fittest-mcp.westus2.cloudapp.azure.com/mcpstreamable-http
In Claude Code: claude mcp add --transport http fittest https://fittest-mcp.westus2.cloudapp.azure.com/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"fittest": {
"url": "https://fittest-mcp.westus2.cloudapp.azure.com/mcp"
}
}
}Live check
Electra Index connected to the hosted endpoint 1h agoONLINE Fittest answered an MCP connection on 31 Oct 2026 and introduced itself as fittest 0.1.0 (MCP protocol 2025-06-18).
4 tools offered to AI assistants
check_structures· Ask the Fittest swarm whether a machine-learned interatomic potential can be trusted on your molecular structures, or whether they need DFT. Three model agents (MACE-MPA-0, AIMNet2, Orb-v3) predict forces; their disagreement sigma_F and theexplain· Explain why Fittest trusted or escalated ONE structure (XYZ text or {Z|symbols, R}): the verdict rule applied, sigma_F vs tau, the Calibrator bucket with its label count, the posterior P(correct) of every candidate in it, which model agentsswarm_status· Show the Fittest population: model agents (answerers) and the Skeptic (critic) with reputations from the ledger, the calibration domain, tau and the verdict rule, which models are live, and the evolution family trees if published. Logging:usage_stats· Aggregate usage of this server: distinct users (anonymous clients that got at least one structure verdict; internal test clients excluded), total calls, calls per tool, first/last call time. No per-user data. Logging: every call to this ser
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://fittest-mcp.westus2.cloudapp.azure.com/mcp | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Website | https://fittest-mcp.westus2.cloudapp.azure.com/ | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Repository | https://github.com/Pavel-Tk/fittest | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Version | 0.1.1 | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
Change history
- NEW31 Oct 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Fittest still online?
Free alerts · no account▲ 0Do you run Fittest? Know when it stops answering
For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
Are you the publisher of Fittest?
Free · show your listingAn independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.
<a href="https://electraindex.com/mcp/fittest?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/fittest" alt="Listed on Electra Index"></a>Questions about Fittest
How do I connect Fittest?
Use the hosted endpoint https://fittest-mcp.westus2.cloudapp.azure.com/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Fittest offer?
When Electra Index connected on 31 Oct 2026, it listed 4 tools: check_structures, explain, swarm_status, usage_stats. The full list is in "Live check" above.
Is Fittest online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 1h ago.