A single function the router can call for exact arithmetic: percentages, compound interest, unit conversions. Free and instant. Bind it to your own implementation or an MCP server on install.
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Evaluates arithmetic and unit-aware expressions exactly, so a model never guesses the maths.
Free account. Installing gives you the manifest plus copy-paste snippets.
See reviewsA single function the router can call for exact arithmetic: percentages, compound interest, unit conversions. Free and instant. Bind it to your own implementation or an MCP server on install.
Copy one of these into your project. Installing also returns the manifest and these snippets.
# after Install: the listing is in your workspace's routing pool - nothing else to configure
curl -s -X POST https://api.opensmartroute.ai/api/v1/route -H 'Authorization: Bearer $OSR_API_KEY' -H 'Content-Type: application/json' -d '{"text": "...", "plan": true}'
# or pin it on the OpenAI-compatible endpoint: {"model": "calculator-tool", ...}An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.
Photo: RDNE Stock project
{
"ocm": "1",
"id": "tool:calculator",
"kind": "tool",
"name": "Calculator",
"description": "Evaluates an arithmetic or unit-aware expression and returns the exact numeric result.",
"publisher": "OpenSmartRoute",
"version": "1.0.0",
"capabilities": {
"domains": [
"math",
"general"
],
"actions": [
"compute"
],
"tags": [
"calculator",
"exact"
]
},
"cost": {
"usd_per_call": 0
},
"latency_ms": 20,
"quality_prior": 0.99,
"examples": [
"What is 18% of 2,450?",
"Convert 96.5 fahrenheit to celsius."
]
}Fetch it by URL: GET /api/v1/registry/calculator-tool/manifest?version=1.0.0
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