magent
Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.
Tradingofflineeip155:8453Exactvia cdp
Fracture-indexOsteoporosisBmdHip-fractureCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 snapshots so far.
$13.75
Verified settled volume
2,750 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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 2026-09-01 19:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2The 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-SIGNATURE header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/fracture_index",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"withdrawDelay": 86400,
"receiverAuthorizer": "0x3721824a31197dcDD2984cF43b92B6cc8A87c0Fb",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "batch-settlement",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://api.magentlab.com/api/calc/fracture_index",
"tags": [
"fracture-index",
"osteoporosis",
"bmd",
"hip-fracture",
"calculator"
],
"mimeType": "application/json",
"description": "Black 2001 FRACTURE Index with known total-hip T-score. Age <65 0 through >=85 5. T >= -1 0; -2 <= T < -1 2; -2.5 <= T < -2 3; T < -2.5 4. Fracture after 50, maternal hip after 50, weight <=125 lb, smoker +1 each; arms to stand +2. Max 15. 5-year hip/vertebral/nonvertebral percents from printed quintiles 1-2, 3-4, 5, 6-7, 8-13. Age 18-120; T -5.0 to 4.0. Not a device, not FRAX, not a DXA order. Postmenopausal derivation; magent does not DXA-scan or take a history.",
"serviceName": "magent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"age": 60,
"bmd_t_score": -0.5,
"arms_to_stand": false,
"current_smoker": false,
"weight_le_125_lb": false,
"fracture_after_50": false,
"maternal_hip_fracture_after_50": false
}
},
"output": {
"type": "json",
"example": {
"age": 60,
"score": 0,
"formula": "fracture_index",
"citation": {
"id": "black-2001",
"doi": "10.1007/s001980170072",
"pmid": "11527048",
"title": "An assessment tool for predicting fracture risk in postmenopausal women",
"source": "Osteoporos Int. 2001;12(7):519-528",
"authors": "Black DM, Steinbuch M, Palermo L, et al."
},
"age_score": 0,
"max_score": 15,
"components": [
{
"value": 60,
"factor": "age",
"points": 0,
"present": false
},
{
"value": -0.5,
"factor": "bmd_t_score",
"points": 0,
"present": false
},
{
"factor": "fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "maternal_hip_fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "weight_le_125_lb",
"points": 0,
"present": false
},
{
"factor": "current_smoker",
"points": 0,
"present": false
},
{
"factor": "arms_to_stand",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"bmd_t_score": -0.5,
"score_group": null,
"arms_to_stand": false,
"current_smoker": false,
"t_score_points": 0,
"weight_le_125_lb": false,
"fracture_after_50": false,
"formula_expression": "FRACTURE Index (with BMD) = age (<65 0, 65-69 1, 70-74 2, 75-79 3, 80-84 4, >=85 5) + total_hip_T (>= -1 0, -2 <= T < -1 2, -2.5 <= T < -2 3, T < -2.5 4) + fracture_after_50 1 + maternal_hip_fracture_after_50 1 + weight_le_125_lb 1 + current_smoker 1 + arms_to_stand 2; Black 2001; max 15; 5-year hip/vertebral/nonvertebral percents by printed quintiles 1-2, 3-4, 5, 6-7, 8-13 (score >=8 maps to 8-13); score 0 unpublished",
"hip_risk_5y_percent": null,
"vertebral_risk_5y_percent": null,
"nonvertebral_risk_5y_percent": null,
"maternal_hip_fracture_after_50": false
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"queryParams": {
"type": "object",
"required": [
"age",
"bmd_t_score",
"fracture_after_50",
"maternal_hip_fracture_after_50",
"weight_le_125_lb",
"current_smoker",
"arms_to_stand"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 18-120). Black 2001 FRACTURE Index: <65 scores 0; 65-69 scores 1; 70-74 scores 2; 75-79 scores 3; 80-84 scores 4; >=85 scores 5. Derivation was postmenopausal SOF women age 65 or older; the published instrument still lists <65 as 0."
},
"bmd_t_score": {
"type": "number",
"description": "Caller-assigned total-hip BMD T-score (number -5.0 to 4.0). Black 2001 with-BMD instrument: T >= -1 scores 0; -2 <= T < -1 scores 2; -2.5 <= T < -2 scores 3; T < -2.5 scores 4. magent does not DXA-scan."
},
"arms_to_stand": {
"type": "boolean",
"description": "Usually needs arms to stand from a chair (Black 2001). true scores 2; false scores 0. true or false. magent does not examine the patient."
},
"current_smoker": {
"type": "boolean",
"description": "Current smoker (Black 2001). true scores 1; false scores 0. true or false. magent does not take a smoking history."
},
"weight_le_125_lb": {
"type": "boolean",
"description": "Weight 125 pounds (57 kg) or less (Black 2001). true scores 1; false scores 0. true or false. magent does not weigh the patient."
},
"fracture_after_50": {
"type": "boolean",
"description": "Any fracture after age 50 (Black 2001). true scores 1; false scores 0. true or false. magent does not take a history."
},
"maternal_hip_fracture_after_50": {
"type": "boolean",
"description": "Maternal hip fracture after age 50 (Black 2001). true scores 1; false scores 0. true or false. magent does not take a history."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x836B…19Ee2. The signed payment is good for 10 minutes.
- Paid to
- 0x836B…19Ee2
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"paymentFlow": "upfront",
"resourceUrl": "https://api.magentlab.com/api/calc/fracture_index",
"assetTransferMethod": "eip3009"
},
"payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"age": 60,
"bmd_t_score": -0.5,
"arms_to_stand": false,
"current_smoker": false,
"weight_le_125_lb": false,
"fracture_after_50": false,
"maternal_hip_fracture_after_50": false
},
{
"age": 60,
"bmd_t_score": -0.5,
"arms_to_stand": false,
"current_smoker": false,
"weight_le_125_lb": false,
"fracture_after_50": false,
"maternal_hip_fracture_after_50": false
}
]
},
"type": "http",
"method": "POST"
},
"output": {
"type": "json",
"example": {
"path": "/api/calc/fracture_index",
"count": 2,
"items": [
{
"age": 60,
"score": 0,
"formula": "fracture_index",
"citation": {
"id": "black-2001",
"doi": "10.1007/s001980170072",
"pmid": "11527048",
"title": "An assessment tool for predicting fracture risk in postmenopausal women",
"source": "Osteoporos Int. 2001;12(7):519-528",
"authors": "Black DM, Steinbuch M, Palermo L, et al."
},
"age_score": 0,
"max_score": 15,
"components": [
{
"value": 60,
"factor": "age",
"points": 0,
"present": false
},
{
"value": -0.5,
"factor": "bmd_t_score",
"points": 0,
"present": false
},
{
"factor": "fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "maternal_hip_fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "weight_le_125_lb",
"points": 0,
"present": false
},
{
"factor": "current_smoker",
"points": 0,
"present": false
},
{
"factor": "arms_to_stand",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"bmd_t_score": -0.5,
"score_group": null,
"arms_to_stand": false,
"current_smoker": false,
"t_score_points": 0,
"weight_le_125_lb": false,
"fracture_after_50": false,
"formula_expression": "FRACTURE Index (with BMD) = age (<65 0, 65-69 1, 70-74 2, 75-79 3, 80-84 4, >=85 5) + total_hip_T (>= -1 0, -2 <= T < -1 2, -2.5 <= T < -2 3, T < -2.5 4) + fracture_after_50 1 + maternal_hip_fracture_after_50 1 + weight_le_125_lb 1 + current_smoker 1 + arms_to_stand 2; Black 2001; max 15; 5-year hip/vertebral/nonvertebral percents by printed quintiles 1-2, 3-4, 5, 6-7, 8-13 (score >=8 maps to 8-13); score 0 unpublished",
"hip_risk_5y_percent": null,
"vertebral_risk_5y_percent": null,
"nonvertebral_risk_5y_percent": null,
"maternal_hip_fracture_after_50": false
},
{
"age": 60,
"score": 0,
"formula": "fracture_index",
"citation": {
"id": "black-2001",
"doi": "10.1007/s001980170072",
"pmid": "11527048",
"title": "An assessment tool for predicting fracture risk in postmenopausal women",
"source": "Osteoporos Int. 2001;12(7):519-528",
"authors": "Black DM, Steinbuch M, Palermo L, et al."
},
"age_score": 0,
"max_score": 15,
"components": [
{
"value": 60,
"factor": "age",
"points": 0,
"present": false
},
{
"value": -0.5,
"factor": "bmd_t_score",
"points": 0,
"present": false
},
{
"factor": "fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "maternal_hip_fracture_after_50",
"points": 0,
"present": false
},
{
"factor": "weight_le_125_lb",
"points": 0,
"present": false
},
{
"factor": "current_smoker",
"points": 0,
"present": false
},
{
"factor": "arms_to_stand",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"bmd_t_score": -0.5,
"score_group": null,
"arms_to_stand": false,
"current_smoker": false,
"t_score_points": 0,
"weight_le_125_lb": false,
"fracture_after_50": false,
"formula_expression": "FRACTURE Index (with BMD) = age (<65 0, 65-69 1, 70-74 2, 75-79 3, 80-84 4, >=85 5) + total_hip_T (>= -1 0, -2 <= T < -1 2, -2.5 <= T < -2 3, T < -2.5 4) + fracture_after_50 1 + maternal_hip_fracture_after_50 1 + weight_le_125_lb 1 + current_smoker 1 + arms_to_stand 2; Black 2001; max 15; 5-year hip/vertebral/nonvertebral percents by printed quintiles 1-2, 3-4, 5, 6-7, 8-13 (score >=8 maps to 8-13); score 0 unpublished",
"hip_risk_5y_percent": null,
"vertebral_risk_5y_percent": null,
"nonvertebral_risk_5y_percent": null,
"maternal_hip_fracture_after_50": false
}
]
}
},
"iconUrl": "https://api.magentlab.com/favicon.ico"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"age",
"bmd_t_score",
"fracture_after_50",
"maternal_hip_fracture_after_50",
"weight_le_125_lb",
"current_smoker",
"arms_to_stand"
],
"properties": {
"age": {
"type": "integer",
"description": "Age in years (integer 18-120). Black 2001 FRACTURE Index: <65 scores 0; 65-69 scores 1; 70-74 scores 2; 75-79 scores 3; 80-84 scores 4; >=85 scores 5. Derivation was postmenopausal SOF women age 65 or older; the published instrument still lists <65 as 0."
},
"bmd_t_score": {
"type": "number",
"description": "Caller-assigned total-hip BMD T-score (number -5.0 to 4.0). Black 2001 with-BMD instrument: T >= -1 scores 0; -2 <= T < -1 scores 2; -2.5 <= T < -2 scores 3; T < -2.5 scores 4. magent does not DXA-scan."
},
"arms_to_stand": {
"type": "boolean",
"description": "Usually needs arms to stand from a chair (Black 2001). true scores 2; false scores 0. true or false. magent does not examine the patient."
},
"current_smoker": {
"type": "boolean",
"description": "Current smoker (Black 2001). true scores 1; false scores 0. true or false. magent does not take a smoking history."
},
"weight_le_125_lb": {
"type": "boolean",
"description": "Weight 125 pounds (57 kg) or less (Black 2001). true scores 1; false scores 0. true or false. magent does not weigh the patient."
},
"fracture_after_50": {
"type": "boolean",
"description": "Any fracture after age 50 (Black 2001). true scores 1; false scores 0. true or false. magent does not take a history."
},
"maternal_hip_fracture_after_50": {
"type": "boolean",
"description": "Maternal hip fracture after age 50 (Black 2001). true scores 1; false scores 0. true or false. magent does not take a history."
}
}
},
"maxItems": 25,
"minItems": 1
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"const": "POST"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-01 19:01Z
- Last indexed by Roundhouse
- 2026-09-07 06:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 10:15Z
- x402 version
- 2
- Max timeout
- 600s
- Liveness probe
- HTTP 0
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. 8 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 magent 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=magent' 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://api.magentlab.com/api/calc/fracture_index, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.