viator-mcp

MCP server for the Viator Partner API (v2) — search tours, activities and experiences for Claude. Search the catalog with structured filters or free text, get product details and availability schedules, browse attractions and destinations, all over stdio.

Developed and maintained by AI (Claude Code). Use at your own discretion.

Quick start

config.json

{
  "mcpServers": {
    "viator": {
      "command": "npx",
      "args": ["-y", "@chrischall/viator-mcp"],
      "env": { "VIATOR_API_KEY": "your-viator-partner-api-key" }
    }
  }
}

Get a key by signing up as a Viator affiliate at partnerresources.viator.com — the Basic Access tier is free. This server targets that tier: read-only search/content/availability; no booking endpoints (product results carry a productUrl for booking on viator.com, tagged with your affiliate id).

Tools

Area	Tools
Products	`vt_search_products`, `vt_get_product`, `vt_list_product_tags`
Search	`vt_search_freetext`
Attractions	`vt_search_attractions`, `vt_get_attraction`
Availability	`vt_get_availability_schedule`
Reference	`vt_list_destinations`, `vt_get_locations`, `vt_get_exchange_rates`
Health	`vt_healthcheck` — is this connector working? Reports whether VIATOR_API_KEY resolved, whether Viator accepted it, and what to fix. Start here when another tool fails: an empty result can mean "no products" or "never authenticated".

All tools are read-only. vt_search_products and vt_search_freetext accept compact: true for slim summaries (code, title, price, rating, booking URL) instead of full records.

Environment

Variable	Required	Description
`VIATOR_API_KEY`	yes	Viator Partner API key (sent as `exp-api-key`)
`VIATOR_API_BASE_URL`	no	API host (default production; set `https://api.sandbox.viator.com/partner` for a sandbox key)
`VIATOR_LANGUAGE`	no	`Accept-Language` for response text (default `en-US`)
`VIATOR_CACHE_TTL`	no	Seconds to cache identical reads (default `60`; `0` disables)
`VIATOR_STATIC_CACHE_TTL`	no	Seconds to cache reference data — destinations, tags, locations, exchange rates (default `3600`)

Viator rate-limits per endpoint on a rolling 10-second window and answers 429/503 with Retry-After; the client honors it (one retry) and the response cache absorbs repeated identical calls.

Development

Terminal

npm install
npm test          # vitest; no real network calls
npm run build     # tsc + esbuild bundle

The API surface this server is coded against is pinned in docs/VIATOR-API.md.

License

MIT