For AI agents and integrations
Mariner GPS Tools API & MCP
Bring Mariner GPS Tools navigation capabilities into your apps, automations, and AI agents through REST or MCP.
marinergps.tools/api/v1marinergps.tools/mcpNavigation tools built to integrate.
Call each capability through a versioned REST endpoint, or let an AI agent discover and use it through MCP.
Convert speeds
Convert between knots, miles per hour, kilometres per hour, metres per second, and feet per second.
POST /api/v1/speed/convertParse and format coordinates
Convert between decimal degrees and degrees, minutes, and seconds (DMS).
POST /api/v1/coordinates/convertCalculate great-circle distance
Calculate great-circle and rhumb-line distances between two positions.
POST /api/v1/distanceCalculate initial true bearing
Calculate the initial true bearing from one position to another.
POST /api/v1/bearingCalculate cross track error
Calculate a position’s perpendicular distance from a great-circle route.
POST /api/v1/xteWhy use the Mariner GPS Tools MCP server?
Give AI agents reliable navigation tools they can call when they need them. Rather than relying on a language model to calculate bearings, distances, coordinate conversions, and other navigation data itself, agents can delegate these tasks to the same purpose-built calculation engine used by Mariner GPS Tools.
Through MCP, an agent can discover the available tools, provide structured inputs, and receive consistent results it can use directly in its workflow.
Deterministic calculations
Navigation results come from dedicated calculation functions, not probabilistic model reasoning.
Lower token usage
Replace calculation prompts and intermediate reasoning with compact tool calls and structured results.
Consistency
The same inputs produce the same calculated results, regardless of the model or agent making the request.
Structured outputs
Machine-readable results can be consumed directly or passed into larger agent workflows.
Less model guesswork
Bearings, distances, coordinate conversions, and other calculations are delegated to purpose-built tools.
Automatic discovery
New Mariner GPS Tools capabilities can become available to MCP clients without requiring a new integration for each tool.
Ready when you are
Build with Mariner GPS Tools
Start with the quickstart, then issue a free key from your account when you are ready to make requests.