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Garden Calculators – Compost C:N Ratio
x402
Garden Calculators – Compost C:N Ratio is a paid API for AI agents from garden-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Calculates the carbon-to-nitrogen ratio of a compost mix using the Cornell formula, or determines greens-to-browns quantities needed to hit a target C:N ratio.
Price / call$0.02
Success—
StatusUnknown
How this service works
Carbon-to-nitrogen ratio of a compost mix by the Cornell formula, or the greens-to-browns amounts that reach a target ratio.
Output
Returns a structured object with the computed C:N ratio as a number and formatted text, a verdict on whether the mix is suitable for composting, a summary, per-ingredient breakdown (dry mass, as-is mass, C:N value and its source), reasons for the verdict, and a disclaimer. Also flags degraded results and lists any unchecked inputs.
Example use cases
Balancing a backyard compost bin
“I have a pile of dry leaves and some fresh grass clippings — how much grass do I need to add to the leaves to hit a target C:N ratio of 30? The leaves are about 40 parts carbon to 1 part nitrogen.”
Checking a multi-ingredient compost mix
“Can you calculate the C:N ratio for my compost mix: grass clippings at 10 kg with 80% moisture, food waste at 5 kg with 70% moisture, and sawdust at 3 kg with 20% moisture? I want to know if the ratio is in the ideal composting range.”
Custom material with unknown C:N ratio
“I want to compost horse manure (C:N of 25) mixed with cardboard (C:N of 350) — what ratio of each should I use to hit a target C:N of 30?”
Technical details
Endpoint
GEThttps://garden-calc.x402tookit.com/compost-cn-ratio?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to compute or balance the carbon-to-nitrogen ratio of a compost mix using the Cornell formula, especially when you have named ingredients (grass, leaves, manure, sawdust) or custom C:N values. It supports both 'what is my current ratio?' (mix mode) and 'how much of each do I need?' (balance mode). Prefer it over generic nutrient calculators when the specific goal is compost pile optimization.
Side effects
- Unknown ingredient name not in the built-in table and no custom C:N provided — returns error or missing data
- Missing required mode parameters (neither balance nor mix mode inputs supplied)
- Out-of-range C:N values (e.g. brownCn below 30 or above 1000) may return validation errors
- Malformed ingredients string (wrong separator or missing mass) causes parse failure
- Network or payment failure returns HTTP 402 or 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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