Games
Geocache Letterbox Munzee Stage-Cache Puzzle-Hunt Coordinate Validator
Validate GC-codes (base-31 with offset, or hex era), place caches on the 81-cell D/T Fizzy grid, chain multi-stage bearing projections into WGS84 waypoints, and cross-check puzzle finals against checker coordinates.
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Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validator' \
-H 'Content-Type: application/json' \
-d '{"gcCode":"GC2SOSO","cacheType":"mystery","difficulty":3,"terrain":2.5,"postedLat":47.61,"postedLon":8.55,"legs":"42.5, 315\n128, 210","checkerLat":47.6109,"checkerLon":8.555,"toleranceM":10}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
HTTP
POST https://api.elysiatools.com/en/api/tools/geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| gcCode | text | Yes | — |
| cacheType | select | No | — |
| difficulty | number | No | — |
| terrain | number | No | — |
| postedLat | number | No | — |
| postedLon |
MCP integration
Add this tool to your Model Context Protocol server so AI agents can list and call it.
Server configuration
Add this block to your MCP client configuration:
mcp.json
{
"mcpServers": {
"elysiatools-geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validator": {
"name": "geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validator",
"description": "Validate GC-codes (base-31 with offset, or hex era), place caches on the 81-cell D/T Fizzy grid, chain multi-stage bearing projections into WGS84 waypoints, and cross-check puzzle finals against checker coordinates.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validator",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
tools/list
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
tools/call
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "geocache-letterbox-munzee-stage-cache-puzzle-hunt-coordinate-validator",
"arguments": {
"gcCode": "GC2SOSO",
"cacheType": "mystery",
"difficulty": 3,
"terrain": 2.5,
"postedLat": 47.61,
"postedLon": 8.55,
"legs": "42.5, 315\n128, 210",
"checkerLat": 47.6109,
"checkerLon": 8.555,
"toleranceM": 10
}
}
}