magent

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

SearchLiveeip155:8453Exactvia cdp
RaAcr-eularClassificationEmergencyCalculator
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 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 2026-08-31 13:30Z
—
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.

{
  "error": "PAYMENT-SIGNATURE header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "paymentFlow": "upfront",
        "resourceUrl": "https://api.magentlab.com/api/calc/acr_eular_ra",
        "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"
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      "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
      "amount": "5000",
      "scheme": "batch-settlement",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 600
    }
  ],
  "resource": {
    "url": "https://api.magentlab.com/api/calc/acr_eular_ra",
    "tags": [
      "ra",
      "acr-eular",
      "classification",
      "emergency",
      "calculator"
    ],
    "mimeType": "application/json",
    "description": "ACR/EULAR 2010 RA classification (Aletaha Table 3). Required: clinical_synovitis true. Score: joint involvement 0/1/2/3/5 + serology 0/2/3 + abnormal CRP or ESR 1 + duration ≥6 weeks 1; max 10. classified false if another disease better explains synovitis; else true if typical RA erosions or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI. magent does not examine joints or titer RF/ACPA.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "serology": "high_positive",
            "abnormal_apr": true,
            "joint_involvement": "four_to_ten_small",
            "clinical_synovitis": true,
            "duration_ge_6_weeks": true,
            "alternative_diagnosis_better": false,
            "erosive_disease_typical_of_ra": false
          }
        },
        "output": {
          "type": "json",
          "example": {
            "band": "classified",
            "score": 8,
            "formula": "acr_eular_ra",
            "citation": {
              "id": "aletaha-2010",
              "doi": "10.1136/ard.2010.138461",
              "pmid": "20699241",
              "title": "2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative",
              "source": "Ann Rheum Dis. 2010;69(9):1580-1588",
              "authors": "Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO 3rd, Birnbaum NS, Burmester GR, Bykerk VP, Cohen MD, Combe B, Costenbader KH, Dougados M, Emery P, Ferraccioli G, Hazes JMW, Hobbs K, Huizinga TWJ, Kavanaugh A, Kay J, Kvien TK, Laing T, Mease P, Ménard HA, Moreland LW, Naden RP, Pincus T, Smolen JS, Stanislawska-Biernat E, Symmons D, Tak PP, Upchurch KS, Vencovský J, Wolfe F, Hawker G"
            },
            "max_score": 10,
            "classified": true,
            "components": [
              {
                "value": "four_to_ten_small",
                "factor": "joint_involvement",
                "points": 3,
                "present": true
              },
              {
                "value": "high_positive",
                "factor": "serology",
                "points": 3,
                "present": true
              },
              {
                "factor": "abnormal_apr",
                "points": 1,
                "present": true
              },
              {
                "factor": "duration_ge_6_weeks",
                "points": 1,
                "present": true
              }
            ],
            "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.",
            "formula_expression": "ACR/EULAR 2010 RA classification (Aletaha Table 3): required clinical_synovitis true (at least one joint with definite clinical synovitis/swelling; else do not score). Score = joint_involvement (one_large 0, two_to_ten_large 1, one_to_three_small 2, four_to_ten_small 3, gt_ten_with_small 5) + serology (negative 0, low_positive 2, high_positive 3) + abnormal_apr 1 + duration_ge_6_weeks 1; max 10. classified false if alternative_diagnosis_better; else true if erosive_disease_typical_of_ra or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI"
          }
        },
        "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": [
                  "clinical_synovitis",
                  "alternative_diagnosis_better",
                  "erosive_disease_typical_of_ra",
                  "joint_involvement",
                  "serology",
                  "abnormal_apr",
                  "duration_ge_6_weeks"
                ],
                "properties": {
                  "serology": {
                    "enum": [
                      "negative",
                      "low_positive",
                      "high_positive"
                    ],
                    "type": "string",
                    "description": "Caller-assigned Aletaha 2010 Table 3 serology row (at least one RF or ACPA test). High-positive RF or ACPA takes the high row. negative scores 0; low_positive scores 2; high_positive scores 3. magent does not titer RF or ACPA."
                  },
                  "abnormal_apr": {
                    "type": "boolean",
                    "description": "Abnormal CRP or ESR as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false (normal CRP and ESR) scores 0. magent does not assay CRP or ESR."
                  },
                  "joint_involvement": {
                    "enum": [
                      "one_large",
                      "two_to_ten_large",
                      "one_to_three_small",
                      "four_to_ten_small",
                      "gt_ten_with_small"
                    ],
                    "type": "string",
                    "description": "Caller-assigned highest Aletaha 2010 Table 3 joint-involvement category. magent does not count joints. Large = shoulders, elbows, hips, knees, ankles. Small = MCP, PIP, 2nd–5th MTP, thumb IP, wrists. DIP, 1st CMC, and 1st MTP are excluded. one_large scores 0; two_to_ten_large scores 1; one_to_three_small (with or without large) scores 2; four_to_ten_small (with or without large) scores 3; gt_ten_with_small (>10 joints, at least 1 small) scores 5."
                  },
                  "clinical_synovitis": {
                    "type": "boolean",
                    "description": "Must be true. Aletaha 2010 entry: at least one joint with definite clinical synovitis (swelling) as assigned by the caller. false is invalid and is not classified=false. magent does not examine joints."
                  },
                  "duration_ge_6_weeks": {
                    "type": "boolean",
                    "description": "Duration of symptoms ≥6 weeks as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false scores 0. magent does not date symptom onset."
                  },
                  "alternative_diagnosis_better": {
                    "type": "boolean",
                    "description": "Synovitis better explained by another disease (Aletaha 2010 target population). true still returns the Table 3 score but classified is false. magent does not assign an alternative diagnosis."
                  },
                  "erosive_disease_typical_of_ra": {
                    "type": "boolean",
                    "description": "Erosive disease typical of RA with a history compatible with prior fulfillment of the 2010 criteria (Aletaha 2010 footnote). true classifies even if score <6. magent does not read films."
                  }
                }
              }
            },
            "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.

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/acr_eular_ra",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "serology": "high_positive",
              "abnormal_apr": true,
              "joint_involvement": "four_to_ten_small",
              "clinical_synovitis": true,
              "duration_ge_6_weeks": true,
              "alternative_diagnosis_better": false,
              "erosive_disease_typical_of_ra": false
            },
            {
              "serology": "high_positive",
              "abnormal_apr": true,
              "joint_involvement": "four_to_ten_small",
              "clinical_synovitis": true,
              "duration_ge_6_weeks": true,
              "alternative_diagnosis_better": false,
              "erosive_disease_typical_of_ra": false
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/acr_eular_ra",
          "count": 2,
          "items": [
            {
              "band": "classified",
              "score": 8,
              "formula": "acr_eular_ra",
              "citation": {
                "id": "aletaha-2010",
                "doi": "10.1136/ard.2010.138461",
                "pmid": "20699241",
                "title": "2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative",
                "source": "Ann Rheum Dis. 2010;69(9):1580-1588",
                "authors": "Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO 3rd, Birnbaum NS, Burmester GR, Bykerk VP, Cohen MD, Combe B, Costenbader KH, Dougados M, Emery P, Ferraccioli G, Hazes JMW, Hobbs K, Huizinga TWJ, Kavanaugh A, Kay J, Kvien TK, Laing T, Mease P, Ménard HA, Moreland LW, Naden RP, Pincus T, Smolen JS, Stanislawska-Biernat E, Symmons D, Tak PP, Upchurch KS, Vencovský J, Wolfe F, Hawker G"
              },
              "max_score": 10,
              "classified": true,
              "components": [
                {
                  "value": "four_to_ten_small",
                  "factor": "joint_involvement",
                  "points": 3,
                  "present": true
                },
                {
                  "value": "high_positive",
                  "factor": "serology",
                  "points": 3,
                  "present": true
                },
                {
                  "factor": "abnormal_apr",
                  "points": 1,
                  "present": true
                },
                {
                  "factor": "duration_ge_6_weeks",
                  "points": 1,
                  "present": true
                }
              ],
              "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.",
              "formula_expression": "ACR/EULAR 2010 RA classification (Aletaha Table 3): required clinical_synovitis true (at least one joint with definite clinical synovitis/swelling; else do not score). Score = joint_involvement (one_large 0, two_to_ten_large 1, one_to_three_small 2, four_to_ten_small 3, gt_ten_with_small 5) + serology (negative 0, low_positive 2, high_positive 3) + abnormal_apr 1 + duration_ge_6_weeks 1; max 10. classified false if alternative_diagnosis_better; else true if erosive_disease_typical_of_ra or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI"
            },
            {
              "band": "classified",
              "score": 8,
              "formula": "acr_eular_ra",
              "citation": {
                "id": "aletaha-2010",
                "doi": "10.1136/ard.2010.138461",
                "pmid": "20699241",
                "title": "2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative",
                "source": "Ann Rheum Dis. 2010;69(9):1580-1588",
                "authors": "Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO 3rd, Birnbaum NS, Burmester GR, Bykerk VP, Cohen MD, Combe B, Costenbader KH, Dougados M, Emery P, Ferraccioli G, Hazes JMW, Hobbs K, Huizinga TWJ, Kavanaugh A, Kay J, Kvien TK, Laing T, Mease P, Ménard HA, Moreland LW, Naden RP, Pincus T, Smolen JS, Stanislawska-Biernat E, Symmons D, Tak PP, Upchurch KS, Vencovský J, Wolfe F, Hawker G"
              },
              "max_score": 10,
              "classified": true,
              "components": [
                {
                  "value": "four_to_ten_small",
                  "factor": "joint_involvement",
                  "points": 3,
                  "present": true
                },
                {
                  "value": "high_positive",
                  "factor": "serology",
                  "points": 3,
                  "present": true
                },
                {
                  "factor": "abnormal_apr",
                  "points": 1,
                  "present": true
                },
                {
                  "factor": "duration_ge_6_weeks",
                  "points": 1,
                  "present": true
                }
              ],
              "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.",
              "formula_expression": "ACR/EULAR 2010 RA classification (Aletaha Table 3): required clinical_synovitis true (at least one joint with definite clinical synovitis/swelling; else do not score). Score = joint_involvement (one_large 0, two_to_ten_large 1, one_to_three_small 2, four_to_ten_small 3, gt_ten_with_small 5) + serology (negative 0, low_positive 2, high_positive 3) + abnormal_apr 1 + duration_ge_6_weeks 1; max 10. classified false if alternative_diagnosis_better; else true if erosive_disease_typical_of_ra or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI"
            }
          ]
        }
      },
      "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": [
                      "clinical_synovitis",
                      "alternative_diagnosis_better",
                      "erosive_disease_typical_of_ra",
                      "joint_involvement",
                      "serology",
                      "abnormal_apr",
                      "duration_ge_6_weeks"
                    ],
                    "properties": {
                      "serology": {
                        "enum": [
                          "negative",
                          "low_positive",
                          "high_positive"
                        ],
                        "type": "string",
                        "description": "Caller-assigned Aletaha 2010 Table 3 serology row (at least one RF or ACPA test). High-positive RF or ACPA takes the high row. negative scores 0; low_positive scores 2; high_positive scores 3. magent does not titer RF or ACPA."
                      },
                      "abnormal_apr": {
                        "type": "boolean",
                        "description": "Abnormal CRP or ESR as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false (normal CRP and ESR) scores 0. magent does not assay CRP or ESR."
                      },
                      "joint_involvement": {
                        "enum": [
                          "one_large",
                          "two_to_ten_large",
                          "one_to_three_small",
                          "four_to_ten_small",
                          "gt_ten_with_small"
                        ],
                        "type": "string",
                        "description": "Caller-assigned highest Aletaha 2010 Table 3 joint-involvement category. magent does not count joints. Large = shoulders, elbows, hips, knees, ankles. Small = MCP, PIP, 2nd–5th MTP, thumb IP, wrists. DIP, 1st CMC, and 1st MTP are excluded. one_large scores 0; two_to_ten_large scores 1; one_to_three_small (with or without large) scores 2; four_to_ten_small (with or without large) scores 3; gt_ten_with_small (>10 joints, at least 1 small) scores 5."
                      },
                      "clinical_synovitis": {
                        "type": "boolean",
                        "description": "Must be true. Aletaha 2010 entry: at least one joint with definite clinical synovitis (swelling) as assigned by the caller. false is invalid and is not classified=false. magent does not examine joints."
                      },
                      "duration_ge_6_weeks": {
                        "type": "boolean",
                        "description": "Duration of symptoms ≥6 weeks as assigned by the caller (Aletaha 2010 Table 3). true scores 1; false scores 0. magent does not date symptom onset."
                      },
                      "alternative_diagnosis_better": {
                        "type": "boolean",
                        "description": "Synovitis better explained by another disease (Aletaha 2010 target population). true still returns the Table 3 score but classified is false. magent does not assign an alternative diagnosis."
                      },
                      "erosive_disease_typical_of_ra": {
                        "type": "boolean",
                        "description": "Erosive disease typical of RA with a history compatible with prior fulfillment of the 2010 criteria (Aletaha 2010 footnote). true classifies even if score <6. magent does not read films."
                      }
                    }
                  },
                  "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 13:30Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-22 15:15Z
x402 version
2
Max timeout
600s
Liveness probe
HTTP 402
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. 10 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/acr_eular_ra, 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.