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/xteReliable results with less model reasoning
Let your AI agent delegate navigation calculations instead of reasoning through them itself. Mariner GPS Tools provides deterministic, structured results while reducing the model work needed to reach an answer.
fewer generated model tokens
Median across 9 tested models.
correct with MCP
594/594 production MCP observations within tolerance.
correct without MCP
594 observations answered by the model alone.
Deterministic calculations
Navigation results come from dedicated calculation functions, not probabilistic model reasoning.
Structured outputs
Machine-readable results can be consumed directly or passed into larger agent workflows.
Automatic discovery
New Mariner GPS Tools capabilities can become available to MCP clients without requiring a new integration for each tool.
Measured September 2026 · 9 models · 22 navigation cases · 3 repetitions · 1188 observations · Production MCP
Benchmark methodology and full resultsReady 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.