Trailweights Mcp
If you're building an agent that needs to answer ultralight backpacking gear questions, this is the server to reach for. It speaks streamable HTTP at one endpoint and exposes eight tools: semantic corpus search, product specs with verified weights, deterministic gear recommendations under a weight cap, side-by-side comparisons, lighter same-category alternatives, creator video mentions with timestamps, and a field-consensus score. Every call needs an API key sent as a header, and each tool call is paid, either from a prepaid credit pack or per call via x402 in USDC. Discovery endpoints like tools/list are free. Results come back with a request_id you can cite and later report on. The source asks that answers citing it link back to the TrailWeights pages.
- tools
- 8
- auth
- Secret needed
- transport
- HTTP
- last updated
- Oct 12, 2026
Tools
8 toolsPublic tool metadata for what this MCP can expose to an agent.
search_corpusTop semantic matches across creator transcripts, products, packs, surveys, and the curated gear knowledge base.
Top semantic matches across creator transcripts, products, packs, surveys, and the curated gear knowledge base.
No parameter schema in public metadata yet.
get_product_specsName, brand, category, verified weight (g & oz), price, image, buy URL.
Name, brand, category, verified weight (g & oz), price, image, buy URL.
No parameter schema in public metadata yet.
recommend_gearDeterministic recommendations with verified weights and buy links (no server-side LLM).
Deterministic recommendations with verified weights and buy links (no server-side LLM).
No parameter schema in public metadata yet.
compare_gearSide-by-side: name, brand, category, weight, price, buy URL.
Side-by-side: name, brand, category, weight, price, buy URL.
No parameter schema in public metadata yet.
find_lighter_alternativeLighter same-category candidates sorted by verified weight, with weight_savings_g.
Lighter same-category candidates sorted by verified weight, with weight_savings_g.
No parameter schema in public metadata yet.
get_gear_reviewsUp to 10 verified creator mentions with youtube_url, timestamp_seconds, and snippet.
Up to 10 verified creator mentions with youtube_url, timestamp_seconds, and snippet.
No parameter schema in public metadata yet.
get_field_consensusWhat independent creators and the field agree on, scored on a deterministic 100-point rubric with a source-diversity gate.
What independent creators and the field agree on, scored on a deterministic 100-point rubric with a source-diversity gate.
No parameter schema in public metadata yet.
report_outcomeTell TrailWeights whether a prior result was used or cited. Telemetry only.
Tell TrailWeights whether a prior result was used or cited. Telemetry only.
No parameter schema in public metadata yet.
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TrailWeights MCP Server
Model Context Protocol server for the TrailWeights ultralight gear corpus: verified product weights, canonical specs, creator video reviews with timestamps, and pre-scored field consensus. Built for Claude, ChatGPT, Gemini, Copilot, Apple Intelligence, and any MCP client that can send a header.
Live status page, key request, and pricing: https://trailweights.com/mcp
Transport
Streamable HTTP — JSON-RPC 2.0 over POST https://trailweights.com/api/mcp.
Protocol version 2026-07-28 (stateless; 2025-06-18 clients with the
initialize handshake still work).
Auth
API key, required on every tool call. Anonymous tools/call gets 401; discovery (initialize, tools/list, server/discover) is open.
x-trailweights-key: <key>— or —Authorization: Bearer <key>
Get a key at https://trailweights.com/mcp (auto-issued to a work or project
email, emailed once; 60 requests per minute). Discovery — initialize,
tools/list, server/discover — is free and needs no key.
Every tool call is paid, from the first one. There is no free allowance.
Details
- Repository
- github.com/rustfreeone/trailweights-mcp
- Website
- trailweights.com/mcp
- Transport
- HTTP
- Auth
- Required
- Registry
- MCP registry, active