FreightUtils — Neutral freight reference layer for AI agents

# FreightUtils — neutral freight reference + validation layer for AI agents > FreightUtils — neutral freight reference + validation layer for AI agents. Every response cites its source: authority, edition, licence, last-verified date. Deterministic tools, not generated answers. Reference only — never filing, booking, or legal advice; results state when human review is required. Authoritative dangerous-goods, customs, location and freight-calculation data an agent can call and cite, from primary sources (ADR 2025 / UNECE, HS 2022 / WCO, IATA-regulated airline prefixes, UN/LOCODE, OurAirports). Neutral by design: no freight to sell, no carrier to push. 23 tools · 23 REST endpoints · 24 MCP tools. Built by a UK ADR-certified freight transport planner. ## Connect - **MCP (Streamable HTTP):** `https://www.freightutils.com/api/mcp` — the 24 MCP tools for AI agents (legacy alias: `/api/mcp/mcp`). - **MCP (stdio):** npm package `freightutils-mcp` — for Claude Desktop / Cursor / Cline / local agents (`npx freightutils-mcp`). Version-agnostic — always resolves the latest published release. - **REST:** base `https://www.freightutils.com/api` — 23 endpoints, JSON, CORS-enabled, no auth for anonymous use. OpenAPI 3.1 spec: https://www.freightutils.com/openapi.json - **Custom GPT:** https://chatgpt.com/g/g-69fb8fdb0a5c819182c73f8d224cc3d0 — the FreightUtils GPT on the OpenAI GPT Store (backed by the same OpenAPI spec). - **API key (optional):** `POST https://www.freightutils.com/api/keys/register`, then send the `x-api-key: <key>` header. Anonymous 25 requests/day per IP · free key 100 requests/day · Pro 50,000 requests/month (£19/mo). ## Tools Each tool is a deterministic REST endpoint (and an MCP tool of the same capability) returning JSON with a `_source` citation. Listed as the capability an agent searches for. ### Freight calculators - [LDM Calculator](https://www.freightutils.com/ldm) — `GET /api/ldm` — loading metres for road trailers: pall

{ "openapi": "3.1.0", "info": { "title": "FreightUtils API", "description": "The neutral freight reference layer for AI agents — authoritative freight reference and calculation APIs (dangerous goods, customs codes, locations, freight math) agents can call and cite, from primary sources. No freight to sell, no carrier to push. No authentication is required for anonymous use (25 requests/day per IP); an optional free API key raises this to 100 requests/day, and Pro is 50,000 requests