# ephemora-cell 1.0.4: a stateless MCP tool server, now on PyPI!! > Source: > Published: 2026-09-21 18:44:59+00:00 No initialize handshake. No session state. Restart or load-balance the server between calls — clients never notice. tools/list answers with CacheableResult fields (ttlMs: 3600000, cacheScope: "private") so hosts can cache the tool list, and unknown versions are rejected with -32022 naming the supported list — never silently swallowed. Handshake-era clients (Claude Desktop, VS Code, Codex) keep working unchanged. Both eras, one process — with a test that runs them mixed against one server instance. python reported = engine.policy_for(spec) # what get-policy says outcome = engine.execute(spec, params) # what actually ran assert reported["preopens"] == \ outcome.report.security_baseline["preopens"] How we verified it Fresh venv, plain pip install ephemora-cell, 13/13 acceptance checks against the published wheel: both MCP eras, version negotiation, policy/witness agreement, legacy compatibility unchanged. Bonus finding: the same echo call consumed identical fuel (21143) across two different installs on different machines — the determinism claim held in the wild. Try it bash pip install ephemora-cell ephemora-cell-mcp # bundled clock + echo; --tools-dir for your own Feedback welcome — repo, issues and the full CHANGELOG are at [https://github.com/MichaelS1011/ephemora-cell](https://github.com/MichaelS1011/ephemora-cell)