# Trail (dev.usetrail/trail@1.25.2) > Source: > Published: 2026-09-02 14:16:33+00:00 [← Index](/leaderboard) # Trail Issue tracker and durable project memory for your coding agent, scoped to the folder you open. The current version, v1.25.2, was published to the official MCP registry on 2026-09-02. It is distributed as usetrail on npm, filed under Filesystem by this index, and declares 2 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; [the index's current counts](/stats) put this record in context. ## Using Trail in Claude, Cursor, Gemini CLI, Cline, or Zed? MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and **HOLDs the call** when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use **Install this server** for that). Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less ``` uv tool install mcpindex-gate && mcpindex-config-wire ``` [method](/methodology) Semantic screen found no manipulation pattern in the description. Conformance probe not yet run. `mcpindex.integrity.description` passINFOevidence“Benign tool description”via static_description - - Semantic screen only - the deterministic conformance probe has not run on this server - - Confidence is reported but not yet calibrated (v1) - - Screen reads the tool description, not the live behavior - - advisory - - registry description only no input schema - - screen model 8b - - The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page. Own this server? [Screen its description →](/screen) ## That verdict was true at screening time (snapshot 2026-09-02). Contracts can change after screening, with no version bump. The gate pins Trail’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday. [See your first HOLD in 2 minutes →](/guides/install-the-gate-first-hold) Related: [how to trust an MCP server](/guides/how-to-trust-an-mcp-server) · [screen before install](/guides/screen-mcp-server-before-install) · [silent contract drift](/guides/mcp-silent-contract-drift) People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land. ``` [Independent trust record for Trail](https://mcpindex.ai/server/dev-usetrail-trail) - screening verdict, registry provenance, and contract drift monitoring. Independent trust record for Trail - screening verdict, registry provenance, and contract drift monitoring. ``` A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does. ``` [![mcpindex](https://mcpindex.ai/api/v1/badge/dev-usetrail-trail)](https://mcpindex.ai/server/dev-usetrail-trail) mcpindex verdict ``` `TRAIL_API_URL` Only for a self-hosted Trail. Left unset, the connector points at the hosted service. `TRAIL_PROJECT` Overrides the project name, which otherwise comes from the folder you have open. [methodology](/methodology) [Synapse RMCPai.dinglebear/synapse](/server/ai-dinglebear-synapse) Host, Docker, Compose, SSH, logs, ZFS, and file operations over MCP and CLI. [UNITEMFG U.S. Manufacturer Directorycom.unitemfg/us-manufacturing-directory](/server/com-unitemfg-us-manufacturing-directory) Search verified U.S. manufacturers with provenance, freshness, and live directory statistics. [dev.yafl/mcpdev.yafl/mcp](/server/dev-yafl-mcp) Agent-first E2EE file transfer over MCP: move files between machines in one tool call, gone in 24h.