magent

Deterministic published-formula arithmetic plus ICD-10-CM, RxNorm, and LOINC. Pay in USDC on Base via x402.

Tradingofflineeip155:8453Exactvia cdp
Canadian-tiaTiaStrokeNeurologyCalculator
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-31 13:34Z
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x836Be278f1739fB4308091cD1852F7971Bc19Ee2

The 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.

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                "value": 80,
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              {
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            "glucose_mmol_l": 5,
            "diastolic_mm_hg": 80,
            "platelets_10e9_l": 200,
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                    "type": "number",
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                    "description": "Already on antiplatelet therapy (Perry 2021 Table 1). true scores 3; false scores 0."
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                    "type": "boolean",
                    "description": "Past history of carotid stenosis (Perry 2021 Table 1). true scores 2; false scores 0. magent does not read imaging."
                  },
                  "gait_disturbance": {
                    "type": "boolean",
                    "description": "Gait disturbance (Perry 2021 Table 1). true scores 1; false scores 0. magent does not examine the patient."
                  },
                  "platelets_10e9_l": {
                    "type": "number",
                    "description": "Platelet count ×10^9/L (1-2000). ≥400 scores 2; 399 scores 0 (Perry 2021 Table 1)."
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                  "symptoms_ge_10_min": {
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                    "description": "Symptoms lasting 10 minutes or longer (Perry 2021 Table 1). true scores 2; false scores 0. magent does not time the episode."
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                  },
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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.

USD Coin contract
0x8335…02913
Payment window
10 minutes
As published
5000 smallest units
The catalog’s raw entry
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Extensions

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              "vertigo": false,
              "af_on_ecg": false,
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            }
          ]
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          "path": "/api/calc/canadian_tia",
          "count": 2,
          "items": [
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              "citation": {
                "id": "perry-2021",
                "doi": "10.1136/bmj.n49",
                "pmid": "33541890",
                "title": "Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack: multicentre prospective cohort study",
                "source": "BMJ. 2021;372:n49",
                "authors": "Perry JJ, Sivilotti MLA, Émond M, Stiell IG, Stotts G, Lee J, Worster A, Morris J, Cheung KW, Jin AY, Oczkowski WJ, Sahlas DJ, Murray HE, Mackey A, Verreault S, Camden MC, Yip S, Teal P, Gladstone DJ, Boulos MI, Chagnon N, Shouldice E, Atzema C, Slaoui T, Teitlebaum J, Abdulaziz K, Nemnom MJ, Wells GA, Sharma M"
              },
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                {
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                {
                  "value": 80,
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                {
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                },
                {
                  "factor": "af_on_ecg",
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                  "value": 200,
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              "glucose_mmol_l": 5,
              "diastolic_mm_hg": 80,
              "platelets_10e9_l": 200,
              "formula_expression": "Canadian TIA Score = first_tia 2 + symptoms_ge_10_min 2 + carotid_stenosis 2 + on_antiplatelet 3 + gait_disturbance 1 + unilateral_weakness 1 + vertigo -3 + (diastolic_mm_hg >= 110) 3 + dysarthria_or_aphasia 1 + af_on_ecg 2 + infarct_on_ct 1 + (platelets_10e9_l >= 400) 2 + (glucose >= 15 mmol/L) 3; age 18-120 required, 0 points; total -3 to 23; tia_risk low <=3 (0.5%), medium 4-8 (2.3%), high >=9 (5.9%) 7-day stroke or carotid revascularization (Perry 2021 Table 1 / Table 4); max 23"
            },
            {
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              "citation": {
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                "doi": "10.1136/bmj.n49",
                "pmid": "33541890",
                "title": "Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack: multicentre prospective cohort study",
                "source": "BMJ. 2021;372:n49",
                "authors": "Perry JJ, Sivilotti MLA, Émond M, Stiell IG, Stotts G, Lee J, Worster A, Morris J, Cheung KW, Jin AY, Oczkowski WJ, Sahlas DJ, Murray HE, Mackey A, Verreault S, Camden MC, Yip S, Teal P, Gladstone DJ, Boulos MI, Chagnon N, Shouldice E, Atzema C, Slaoui T, Teitlebaum J, Abdulaziz K, Nemnom MJ, Wells GA, Sharma M"
              },
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              "age_years": 70,
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                  "points": 0,
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                  "points": 0,
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                },
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                {
                  "factor": "af_on_ecg",
                  "points": 0,
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                {
                  "factor": "infarct_on_ct",
                  "points": 0,
                  "present": false
                },
                {
                  "value": 200,
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                {
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              "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.",
              "glucose_mmol_l": 5,
              "diastolic_mm_hg": 80,
              "platelets_10e9_l": 200,
              "formula_expression": "Canadian TIA Score = first_tia 2 + symptoms_ge_10_min 2 + carotid_stenosis 2 + on_antiplatelet 3 + gait_disturbance 1 + unilateral_weakness 1 + vertigo -3 + (diastolic_mm_hg >= 110) 3 + dysarthria_or_aphasia 1 + af_on_ecg 2 + infarct_on_ct 1 + (platelets_10e9_l >= 400) 2 + (glucose >= 15 mmol/L) 3; age 18-120 required, 0 points; total -3 to 23; tia_risk low <=3 (0.5%), medium 4-8 (2.3%), high >=9 (5.9%) 7-day stroke or carotid revascularization (Perry 2021 Table 1 / Table 4); max 23"
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              "properties": {
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                  "items": {
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                      "symptoms_ge_10_min",
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                      "on_antiplatelet",
                      "gait_disturbance",
                      "unilateral_weakness",
                      "vertigo",
                      "diastolic_mm_hg",
                      "dysarthria_or_aphasia",
                      "af_on_ecg",
                      "infarct_on_ct",
                      "platelets_10e9_l"
                    ],
                    "properties": {
                      "age": {
                        "type": "integer",
                        "description": "Age in years (18-120). Required for the adult ED cohort. Does not add points (Perry 2021 Table 1 has no age item)."
                      },
                      "vertigo": {
                        "type": "boolean",
                        "description": "Vertigo (Perry 2021 Table 1). true scores -3; false scores 0. magent does not examine the patient."
                      },
                      "af_on_ecg": {
                        "type": "boolean",
                        "description": "Atrial fibrillation on ECG (Perry 2021 Table 1). true scores 2; false scores 0. magent does not read the ECG."
                      },
                      "first_tia": {
                        "type": "boolean",
                        "description": "Lifetime first TIA (Perry 2021 Table 1). true scores 2; false scores 0. Caller-assigned; magent does not take a history."
                      },
                      "glucose_mg_dl": {
                        "type": "number",
                        "description": "Glucose in mg/dL (50-1000). Converted as mmol/L = mg/dL / 18. Provide this or glucose_mmol_l, not both. ≥15 mmol/L after conversion scores 3."
                      },
                      "infarct_on_ct": {
                        "type": "boolean",
                        "description": "New or old infarction on CT (Perry 2021 Table 1). true scores 1; false scores 0. magent does not read the CT."
                      },
                      "glucose_mmol_l": {
                        "type": "number",
                        "description": "Glucose in mmol/L (2.8-55.5). Provide this or glucose_mg_dl, not both. ≥15.0 scores 3; 14.9 scores 0 (Perry 2021 Table 1)."
                      },
                      "diastolic_mm_hg": {
                        "type": "number",
                        "description": "Initial triage diastolic blood pressure in mm Hg (20-160). ≥110 scores 3; 109 scores 0 (Perry 2021 Table 1)."
                      },
                      "on_antiplatelet": {
                        "type": "boolean",
                        "description": "Already on antiplatelet therapy (Perry 2021 Table 1). true scores 3; false scores 0."
                      },
                      "carotid_stenosis": {
                        "type": "boolean",
                        "description": "Past history of carotid stenosis (Perry 2021 Table 1). true scores 2; false scores 0. magent does not read imaging."
                      },
                      "gait_disturbance": {
                        "type": "boolean",
                        "description": "Gait disturbance (Perry 2021 Table 1). true scores 1; false scores 0. magent does not examine the patient."
                      },
                      "platelets_10e9_l": {
                        "type": "number",
                        "description": "Platelet count ×10^9/L (1-2000). ≥400 scores 2; 399 scores 0 (Perry 2021 Table 1)."
                      },
                      "symptoms_ge_10_min": {
                        "type": "boolean",
                        "description": "Symptoms lasting 10 minutes or longer (Perry 2021 Table 1). true scores 2; false scores 0. magent does not time the episode."
                      },
                      "unilateral_weakness": {
                        "type": "boolean",
                        "description": "Unilateral weakness (Perry 2021 Table 1). true scores 1; false scores 0. magent does not examine the patient."
                      },
                      "dysarthria_or_aphasia": {
                        "type": "boolean",
                        "description": "Dysarthria or aphasia on history or examination (Perry 2021 Table 1). true scores 1; false scores 0. Not 3. magent does not examine the patient."
                      }
                    }
                  },
                  "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
2026-08-31 13:34Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-13 06:45Z
x402 version
2
Max timeout
600s
Liveness probe
HTTP 0
Report

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. 13 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show 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/canadian_tia, 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.