# io.github.chrischall/viator-mcp (io.github.chrischall/viator-mcp@1.1.0) > Source: > Published: 2026-09-02 00:16:51+00:00 [← Index](/leaderboard) # io.github.chrischall/viator-mcp Search Viator tours and activities — products, availability, attractions, destinations. The current version, v1.1.0, was published to the official MCP registry on 2026-09-02. It is distributed as @chrischall/viator-mcp on npm, filed under Search by this index, and declares 4 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 io.github.chrischall/viator-mcp 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“No malicious instructions found”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 - - Still current: the description we screened is unchanged, re-checked against the registry - - 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 io.github.chrischall/viator-mcp’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 io.github.chrischall/viator-mcp](https://mcpindex.ai/server/io-github-chrischall-viator-mcp) - screening verdict, registry provenance, and contract drift monitoring. Independent trust record for io.github.chrischall/viator-mcp - 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/io-github-chrischall-viator-mcp)](https://mcpindex.ai/server/io-github-chrischall-viator-mcp) mcpindex verdict ``` `VIATOR_API_KEY` Viator Partner API key (exp-api-key) — free Basic Access affiliate signup at partnerresources.viator.com `VIATOR_LANGUAGE` Accept-Language for response text, e.g. en-US, es, fr, de, ja (default en-US) `VIATOR_CACHE_TTL` Seconds to cache identical read responses (default 60; 0 disables) `VIATOR_STATIC_CACHE_TTL` Seconds to cache reference data — destinations, tags, locations, rates (default 3600; 0 disables) [methodology](/methodology) [YTDL RMCPai.dinglebear/rytdl](/server/ai-dinglebear-rytdl) yt-dlp search, download, metadata, delivery, and Plex workflows over MCP and CLI. [Fodda Topic & Trend Researchai.fodda/topic-research](/server/ai-fodda-topic-research) Trend, stats & insight search across PSFK expert graphs with citable sources. [io.github.chrischall/zillow-mcpio.github.chrischall/zillow-mcp](/server/io-github-chrischall-zillow-mcp) Zillow real-estate for Claude — search, property details, Zestimates, saved searches & homes