Physics Calculators
Work (force x distance x cos angle), kinetic and potential energy, and power, with joule, kWh, calorie and horsepower units.
OtherLiveeip155:8453Exactvia cdp
PhysicsWorkEnergyPowerCalculator
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 21:00Z
—
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": {
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"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://physics-calc.x402tookit.com/work-energy",
"description": "Work (force x distance x cos angle), kinetic and potential energy, and power, with joule, kWh, calorie and horsepower units.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
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"forceN": 50,
"angleDeg": 60,
"distanceM": 10
}
},
"output": {
"asOf": "2026-10-11T08:56:14.581Z",
"work": {
"joules": 250,
"footPounds": 184.391,
"kilocalories": 0.0597514,
"kilowattHours": 0.0000694444
},
"power": {
"watts": 50,
"kilowatts": 0.05,
"horsepower": 0.0670511
},
"source": "computed locally",
"reasons": [
"W = F d cos(angle); KE = m v^2 / 2; PE = m g h; P = W / t. 1 hp (mechanical) = 745.7 W; 1 kcal = 4184 J."
],
"summary": "work 250 J; power 50 W.",
"verdict": "COMPUTED",
"degraded": false,
"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": [
"relativistic speeds (kinetic energy 1/2 m v^2 fails near the speed of light; see /relativity)",
"friction and other losses unless you include them in the force",
"…1 more"
]
}
},
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{
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"description": "Work (force x distance x cos angle), kinetic and potential energy, and power, with joule, kWh, calorie and horsepower units.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
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"angleDeg": 60,
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}
},
"output": {
"asOf": "2026-10-11T08:56:14.581Z",
"work": {
"joules": 250,
"footPounds": 184.391,
"kilocalories": 0.0597514,
"kilowattHours": 0.0000694444
},
"power": {
"watts": 50,
"kilowatts": 0.05,
"horsepower": 0.0670511
},
"source": "computed locally",
"reasons": [
"W = F d cos(angle); KE = m v^2 / 2; PE = m g h; P = W / t. 1 hp (mechanical) = 745.7 W; 1 kcal = 4184 J."
],
"summary": "work 250 J; power 50 W.",
"verdict": "COMPUTED",
"degraded": false,
"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": [
"relativistic speeds (kinetic energy 1/2 m v^2 fails near the speed of light; see /relativity)",
"friction and other losses unless you include them in the force",
"…1 more"
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{
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"scheme": "exact",
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"resource": "https://physics-calc.x402tookit.com/work-energy",
"description": "Work (force x distance x cos angle), kinetic and potential energy, and power, with joule, kWh, calorie and horsepower units.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
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"forceN": 50,
"angleDeg": 60,
"distanceM": 10
}
},
"output": {
"asOf": "2026-10-11T08:56:14.581Z",
"work": {
"joules": 250,
"footPounds": 184.391,
"kilocalories": 0.0597514,
"kilowattHours": 0.0000694444
},
"power": {
"watts": 50,
"kilowatts": 0.05,
"horsepower": 0.0670511
},
"source": "computed locally",
"reasons": [
"W = F d cos(angle); KE = m v^2 / 2; PE = m g h; P = W / t. 1 hp (mechanical) = 745.7 W; 1 kcal = 4184 J."
],
"summary": "work 250 J; power 50 W.",
"verdict": "COMPUTED",
"degraded": false,
"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": [
"relativistic speeds (kinetic energy 1/2 m v^2 fails near the speed of light; see /relativity)",
"friction and other losses unless you include them in the force",
"…1 more"
]
}
},
"maxAmountRequired": "20000",
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}
],
"x402Version": 1,
"alsoAvailable": {
"llms": "https://physics-calc.x402tookit.com/llms.txt",
"catalog": "https://physics-calc.x402tookit.com/catalog",
"message": "Physics Calculators has 12 pay-per-call endpoints (Exact physics formulas for agents: kinematics, projectiles, inclines, collisions, orbits, oscillators, waves, optics, relativity and blackbody radiation.), from $0.02 a call. See the full menu and send your agents our way.",
"openapi": "https://physics-calc.x402tookit.com/openapi.json",
"related": [
{
"url": "https://physics-calc.x402tookit.com/relativity",
"path": "/relativity",
"what": "Special relativity: Lorentz factor, time dilation, length contraction, total and kinetic…",
"price": "$0.02"
},
{
"url": "https://physics-calc.x402tookit.com/blackbody",
"path": "/blackbody",
"what": "Blackbody radiation: Wien peak wavelength and frequency, Stefan-Boltzmann power per area,…",
"price": "$0.02"
},
{
"url": "https://physics-calc.x402tookit.com/collision-1d",
"path": "/collision-1d",
"what": "Head-on collision of two masses: velocities after impact, momentum and kinetic energy los…",
"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",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
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"extra": {
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"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"amount": "20000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
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},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
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},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "20000",
"scheme": "exact",
"network": "eip155:42161",
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{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"timeS": 5,
"forceN": 50,
"angleDeg": 60,
"distanceM": 10
}
},
"output": {
"type": "json",
"example": {
"asOf": "2026-10-11T08:56:14.581Z",
"work": {
"joules": 250,
"footPounds": 184.391,
"kilocalories": 0.0597514,
"kilowattHours": 0.0000694444
},
"power": {
"watts": 50,
"kilowatts": 0.05,
"horsepower": 0.0670511
},
"source": "computed locally",
"reasons": [
"W = F d cos(angle); KE = m v^2 / 2; PE = m g h; P = W / t. 1 hp (mechanical) = 745.7 W; 1 kcal = 4184 J."
],
"summary": "work 250 J; power 50 W.",
"verdict": "COMPUTED",
"degraded": false,
"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": [
"relativistic speeds (kinetic energy 1/2 m v^2 fails near the speed of light; see /relativity)",
"friction and other losses unless you include them in the force",
"…1 more"
]
}
}
},
"schema": {
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"$schema": "https://json-schema.org/draft/2020-12/schema",
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"method": {
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"queryParams": {
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"properties": {
"timeS": {
"type": "number",
"description": "Time in seconds, for power"
},
"forceN": {
"type": "number",
"description": "Force in newtons (with distanceM for work)"
},
"massKg": {
"type": "number",
"description": "Mass in kg (for kinetic with speedMS, potential with heightM)"
},
"gravity": {
"type": "number",
"description": "Gravity in m/s2 (default 9.80665)"
},
"heightM": {
"type": "number",
"description": "Height in metres"
},
"speedMS": {
"type": "number",
"description": "Speed in m/s"
},
"angleDeg": {
"type": "number",
"description": "Angle between force and motion, 0 to 180 (default 0)"
},
"distanceM": {
"type": "number",
"description": "Distance in metres"
}
}
}
},
"additionalProperties": false
},
"output": {
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"footPounds": {
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"kilocalories": {
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]
},
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"type": [
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"number"
]
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"horsepower": {
"type": [
"null",
"number"
]
}
}
},
"source": {
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},
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"string"
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},
"verdict": {
"type": [
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},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
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},
"notChecked": {
"type": [
"array",
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}
}Provenance
- Seen in the source catalog
- 2026-10-20 21:00Z
- Last indexed by Roundhouse
- 2026-10-22 19:30Z
- Last enriched (probe, favicon, geo)
- 2026-10-20 22:15Z
- 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 Physics Calculators 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=Physics%20Calculators' 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://physics-calc.x402tookit.com/work-energy, 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.