Farm & Garden Calc
Fertilizer product rate and total needed to hit a target N, P2O5 or K2O rate, and all nutrients it supplies.
OtherLiveeip155:8453Exactvia cdp
AgricultureFertilizerApplication-rateNpk
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$24.31
Verified settled volume
1,175 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-20 20:45Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb531320805C5BED1D46AEaDcF4F008FDF172DBDaThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
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"extra": {
"name": "USD Coin",
"version": "2"
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"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://agri-calc.x402tookit.com/fertilizer-rate",
"description": "Fertilizer product rate and total needed to hit a target N, P2O5 or K2O rate, and all nutrients it supplies.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"area": 10,
"analysis": "46-0-0",
"nutrient": "n",
"targetRate": 150
}
},
"output": {
"area": 10,
"asOf": "2026-10-11T23:40:36.542Z",
"units": "imperial",
"source": "computed locally (product = nutrient / analysis fraction)",
"reasons": [
"Product needed = target / 0.46 (the N fraction of the product).",
"Other nutrients in the product come along at the same rate; see nSupplied, p2o5Supplied and k2oSupplied."
],
"summary": "326.09 lb/acre of 46-0-0 supplies 150 lb/acre N; 3260.9 lb over 10 acre of field.",
"verdict": "RATE_COMPUTED",
"degraded": false,
"nSupplied": 150,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"nutrient credits from soil, manure, previous crops and irrigation water",
"ammonia loss, leaching and placement efficiency",
"…2 more"
],
"targetRate": 150,
"k2oSupplied": 0,
"p2o5Supplied": 0,
"totalProduct": 3260.8696,
"targetNutrient": "n",
"productRateUnit": "lb/acre",
"totalProductUnit": "lb",
"elementalKSupplied": 0,
"elementalPSupplied": 0,
"productRatePerArea": 326.087
}
},
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{
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"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact",
"network": "solana",
"mimeType": "application/json",
"resource": "https://agri-calc.x402tookit.com/fertilizer-rate",
"description": "Fertilizer product rate and total needed to hit a target N, P2O5 or K2O rate, and all nutrients it supplies.",
"outputSchema": {
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"method": "GET",
"queryParams": {
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"analysis": "46-0-0",
"nutrient": "n",
"targetRate": 150
}
},
"output": {
"area": 10,
"asOf": "2026-10-11T23:40:36.542Z",
"units": "imperial",
"source": "computed locally (product = nutrient / analysis fraction)",
"reasons": [
"Product needed = target / 0.46 (the N fraction of the product).",
"Other nutrients in the product come along at the same rate; see nSupplied, p2o5Supplied and k2oSupplied."
],
"summary": "326.09 lb/acre of 46-0-0 supplies 150 lb/acre N; 3260.9 lb over 10 acre of field.",
"verdict": "RATE_COMPUTED",
"degraded": false,
"nSupplied": 150,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"nutrient credits from soil, manure, previous crops and irrigation water",
"ammonia loss, leaching and placement efficiency",
"…2 more"
],
"targetRate": 150,
"k2oSupplied": 0,
"p2o5Supplied": 0,
"totalProduct": 3260.8696,
"targetNutrient": "n",
"productRateUnit": "lb/acre",
"totalProductUnit": "lb",
"elementalKSupplied": 0,
"elementalPSupplied": 0,
"productRatePerArea": 326.087
}
},
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
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"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact",
"network": "polygon",
"mimeType": "application/json",
"resource": "https://agri-calc.x402tookit.com/fertilizer-rate",
"description": "Fertilizer product rate and total needed to hit a target N, P2O5 or K2O rate, and all nutrients it supplies.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"area": 10,
"analysis": "46-0-0",
"nutrient": "n",
"targetRate": 150
}
},
"output": {
"area": 10,
"asOf": "2026-10-11T23:40:36.542Z",
"units": "imperial",
"source": "computed locally (product = nutrient / analysis fraction)",
"reasons": [
"Product needed = target / 0.46 (the N fraction of the product).",
"Other nutrients in the product come along at the same rate; see nSupplied, p2o5Supplied and k2oSupplied."
],
"summary": "326.09 lb/acre of 46-0-0 supplies 150 lb/acre N; 3260.9 lb over 10 acre of field.",
"verdict": "RATE_COMPUTED",
"degraded": false,
"nSupplied": 150,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"nutrient credits from soil, manure, previous crops and irrigation water",
"ammonia loss, leaching and placement efficiency",
"…2 more"
],
"targetRate": 150,
"k2oSupplied": 0,
"p2o5Supplied": 0,
"totalProduct": 3260.8696,
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"productRateUnit": "lb/acre",
"totalProductUnit": "lb",
"elementalKSupplied": 0,
"elementalPSupplied": 0,
"productRatePerArea": 326.087
}
},
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
],
"x402Version": 1,
"alsoAvailable": {
"llms": "https://agri-calc.x402tookit.com/llms.txt",
"catalog": "https://agri-calc.x402tookit.com/catalog",
"message": "Farm & Garden Calc has 10 pay-per-call endpoints (Growing degree days, ET0, plant counts, fertilizer maths, lime, irrigation time, feed and stocking arithmetic.), from $0.02 a call. See the full menu and send your agents our way.",
"openapi": "https://agri-calc.x402tookit.com/openapi.json",
"related": [
{
"url": "https://agri-calc.x402tookit.com/npk-blend",
"path": "/npk-blend",
"what": "N-P-K analysis of a dry fertilizer blend from components given as analysis:weight, plus e…",
"price": "$0.02"
},
{
"url": "https://agri-calc.x402tookit.com/gdd",
"path": "/gdd",
"what": "Growing degree days from daily max and min temperatures: modified corn 86/50 F method or…",
"price": "$0.02"
},
{
"url": "https://agri-calc.x402tookit.com/irrigation-time",
"path": "/irrigation-time",
"what": "Irrigation run time and water volume to apply a depth over an area at a pump or system fl…",
"price": "$0.02"
}
]
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0xb531…2DBDa. The signed payment is good for 5 minutes.
- Paid to
- 0xb531…2DBDa
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
20000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- DUPiup…eEm8s
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
20000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
20000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
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"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
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"scheme": "exact",
"network": "eip155:8453",
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{
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"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
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"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:137",
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},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
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"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
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{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"area": 10,
"analysis": "46-0-0",
"nutrient": "n",
"targetRate": 150
}
},
"output": {
"type": "json",
"example": {
"area": 10,
"asOf": "2026-10-11T23:40:36.542Z",
"units": "imperial",
"source": "computed locally (product = nutrient / analysis fraction)",
"reasons": [
"Product needed = target / 0.46 (the N fraction of the product).",
"Other nutrients in the product come along at the same rate; see nSupplied, p2o5Supplied and k2oSupplied."
],
"summary": "326.09 lb/acre of 46-0-0 supplies 150 lb/acre N; 3260.9 lb over 10 acre of field.",
"verdict": "RATE_COMPUTED",
"degraded": false,
"nSupplied": 150,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"nutrient credits from soil, manure, previous crops and irrigation water",
"ammonia loss, leaching and placement efficiency",
"…2 more"
],
"targetRate": 150,
"k2oSupplied": 0,
"p2o5Supplied": 0,
"totalProduct": 3260.8696,
"targetNutrient": "n",
"productRateUnit": "lb/acre",
"totalProductUnit": "lb",
"elementalKSupplied": 0,
"elementalPSupplied": 0,
"productRatePerArea": 326.087
}
}
},
"schema": {
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"queryParams": {
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"properties": {
"area": {
"type": "number",
"description": "Field size in acres (imperial) or hectares (metric), for the total product"
},
"units": {
"type": "string",
"description": "imperial (default: lb, acre) or metric (kg, ha)"
},
"analysis": {
"type": "string",
"description": "Product analysis N-P2O5-K2O percent, e.g. 46-0-0 or 18-46-0"
},
"nutrient": {
"type": "string",
"description": "Target nutrient: n, p2o5 or k2o"
},
"targetRate": {
"type": "number",
"description": "Target nutrient per area unit: lb/acre (imperial) or kg/ha (metric)"
}
}
}
},
"additionalProperties": false
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"nSupplied": {
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"notChecked": {
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},
"targetRate": {
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},
"k2oSupplied": {
"type": [
"null",
"number"
]
},
"p2o5Supplied": {
"type": [
"null",
"number"
]
},
"totalProduct": {
"type": [
"null",
"number"
]
},
"targetNutrient": {
"type": [
"null",
"string"
]
},
"productRateUnit": {
"type": [
"null",
"string"
]
},
"totalProductUnit": {
"type": [
"null",
"string"
]
},
"elementalKSupplied": {
"type": [
"null",
"number"
]
},
"elementalPSupplied": {
"type": [
"null",
"number"
]
},
"productRatePerArea": {
"type": [
"null",
"number"
]
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-20 20:45Z
- Last indexed by Roundhouse
- 2026-10-22 12:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 00:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Farm & Garden Calc and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Farm%20%26%20Garden%20Calc' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://agri-calc.x402tookit.com/fertilizer-rate, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.