Roundhouse

magent

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

SearchLiveeip155:8453Exactvia cdp
https://api.magentlab.com/api/calc/rome_iv_nbs
Rome-iv-nbsNbsGiNarcotic-bowelRome-iv
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 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 01:38Z
—
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/rome_iv_nbs",
        "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/rome_iv_nbs",
    "tags": [
      "rome-iv-nbs",
      "nbs",
      "gi",
      "narcotic-bowel",
      "rome-iv"
    ],
    "mimeType": "application/json",
    "description": "Keefer 2016 Rome IV NBS (D2). rome_iv_nbs is true iff chronic or frequently recurring abdominal pain on narcotics, pain not explained by a GI diagnosis, at least two of three NBS features, last-3-months criteria, and 6-month onset. nbs_features_met is 0-3. Caller assigns seven flags. ~75 mg oral morphine equivalent is copy-only. magent does not examine the patient or judge opioid dose. Not a diagnosis, not CAPS, not opioid-induced constipation.",
    "serviceName": "magent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "fulfilled_last_3_months": true,
            "onset_at_least_6_months": true,
            "pain_not_explained_by_current_or_previous_gi_diagnosis": true,
            "chronic_or_frequently_recurring_abdominal_pain_on_narcotics": true,
            "progression_of_frequency_duration_intensity_of_pain_episodes": false,
            "marked_worsening_when_dose_wanes_improvement_when_reinstituted": true,
            "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics": true
          }
        },
        "output": {
          "type": "json",
          "example": {
            "formula": "rome_iv_nbs",
            "citation": {
              "id": "keefer-2016",
              "doi": "10.1053/j.gastro.2016.02.034",
              "pmid": "27144628",
              "title": "Centrally Mediated Disorders of Gastrointestinal Pain",
              "source": "Gastroenterology. 2016;150(6):1408-1419",
              "authors": "Keefer L, Drossman DA, Guthrie E, Simrén M, Tillisch K, Olden K, Whorwell PJ"
            },
            "criteria": [
              {
                "met": true,
                "factor": "chronic_or_frequently_recurring_abdominal_pain_on_narcotics"
              },
              {
                "met": true,
                "factor": "pain_not_explained_by_current_or_previous_gi_diagnosis"
              },
              {
                "met": true,
                "factor": "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics"
              },
              {
                "met": true,
                "factor": "marked_worsening_when_dose_wanes_improvement_when_reinstituted"
              },
              {
                "met": false,
                "factor": "progression_of_frequency_duration_intensity_of_pain_episodes"
              },
              {
                "met": true,
                "value": 2,
                "factor": "nbs_features_ge_2"
              },
              {
                "met": true,
                "factor": "fulfilled_last_3_months"
              },
              {
                "met": true,
                "factor": "onset_at_least_6_months"
              }
            ],
            "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.",
            "rome_iv_nbs": true,
            "nbs_features_met": 2,
            "formula_expression": "rome_iv_nbs iff chronic_or_frequently_recurring_abdominal_pain_on_narcotics and pain_not_explained_by_current_or_previous_gi_diagnosis and nbs_features_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; nbs_features_met counts pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics, marked_worsening_when_dose_wanes_improvement_when_reinstituted, and progression_of_frequency_duration_intensity_of_pain_episodes (Keefer 2016 Rome IV D2 Narcotic Bowel Syndrome / opioid-induced GI hyperalgesia)"
          }
        },
        "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": [
                  "chronic_or_frequently_recurring_abdominal_pain_on_narcotics",
                  "pain_not_explained_by_current_or_previous_gi_diagnosis",
                  "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics",
                  "marked_worsening_when_dose_wanes_improvement_when_reinstituted",
                  "progression_of_frequency_duration_intensity_of_pain_episodes",
                  "fulfilled_last_3_months",
                  "onset_at_least_6_months"
                ],
                "properties": {
                  "fulfilled_last_3_months": {
                    "type": "boolean",
                    "description": "Criteria fulfilled for the last 3 months, as assigned (Keefer 2016). true or false as assigned by the caller. magent does not take a history."
                  },
                  "onset_at_least_6_months": {
                    "type": "boolean",
                    "description": "Symptom onset at least 6 months prior to diagnosis, as assigned (Keefer 2016). true or false as assigned by the caller. magent does not take a history."
                  },
                  "pain_not_explained_by_current_or_previous_gi_diagnosis": {
                    "type": "boolean",
                    "description": "The nature and intensity of the pain is not explained by a current or previous GI diagnosis (a structural diagnosis may exist but is not sufficient to explain the pain), as assigned (Keefer 2016). true or false as assigned by the caller. magent does not examine the patient."
                  },
                  "chronic_or_frequently_recurring_abdominal_pain_on_narcotics": {
                    "type": "boolean",
                    "description": "Chronic or frequently recurring abdominal pain treated with acute high-dose or chronic narcotics; pain must occur most days, as assigned (Keefer 2016 Rome IV NBS / D2). Patients often take about 75 mg oral morphine equivalent; no particular time frame or dosage is required. true or false as assigned by the caller. magent does not examine the patient or judge opioid dose."
                  },
                  "progression_of_frequency_duration_intensity_of_pain_episodes": {
                    "type": "boolean",
                    "description": "Progression of the frequency, duration, and intensity of pain episodes (one of three NBS features; at least two required). true or false as assigned by the caller."
                  },
                  "marked_worsening_when_dose_wanes_improvement_when_reinstituted": {
                    "type": "boolean",
                    "description": "Marked worsening of pain when the narcotic dose wanes and improvement when narcotics are re-instituted (soar and crash; one of three NBS features; at least two required). true or false as assigned by the caller."
                  },
                  "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics": {
                    "type": "boolean",
                    "description": "Pain worsens or incompletely resolves with continued or escalating dosages of narcotics (one of three NBS features; at least two required). true or false as assigned by the caller."
                  }
                }
              }
            },
            "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/rome_iv_nbs",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "items": [
            {
              "fulfilled_last_3_months": true,
              "onset_at_least_6_months": true,
              "pain_not_explained_by_current_or_previous_gi_diagnosis": true,
              "chronic_or_frequently_recurring_abdominal_pain_on_narcotics": true,
              "progression_of_frequency_duration_intensity_of_pain_episodes": false,
              "marked_worsening_when_dose_wanes_improvement_when_reinstituted": true,
              "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics": true
            },
            {
              "fulfilled_last_3_months": true,
              "onset_at_least_6_months": true,
              "pain_not_explained_by_current_or_previous_gi_diagnosis": true,
              "chronic_or_frequently_recurring_abdominal_pain_on_narcotics": true,
              "progression_of_frequency_duration_intensity_of_pain_episodes": false,
              "marked_worsening_when_dose_wanes_improvement_when_reinstituted": true,
              "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics": true
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/rome_iv_nbs",
          "count": 2,
          "items": [
            {
              "formula": "rome_iv_nbs",
              "citation": {
                "id": "keefer-2016",
                "doi": "10.1053/j.gastro.2016.02.034",
                "pmid": "27144628",
                "title": "Centrally Mediated Disorders of Gastrointestinal Pain",
                "source": "Gastroenterology. 2016;150(6):1408-1419",
                "authors": "Keefer L, Drossman DA, Guthrie E, Simrén M, Tillisch K, Olden K, Whorwell PJ"
              },
              "criteria": [
                {
                  "met": true,
                  "factor": "chronic_or_frequently_recurring_abdominal_pain_on_narcotics"
                },
                {
                  "met": true,
                  "factor": "pain_not_explained_by_current_or_previous_gi_diagnosis"
                },
                {
                  "met": true,
                  "factor": "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics"
                },
                {
                  "met": true,
                  "factor": "marked_worsening_when_dose_wanes_improvement_when_reinstituted"
                },
                {
                  "met": false,
                  "factor": "progression_of_frequency_duration_intensity_of_pain_episodes"
                },
                {
                  "met": true,
                  "value": 2,
                  "factor": "nbs_features_ge_2"
                },
                {
                  "met": true,
                  "factor": "fulfilled_last_3_months"
                },
                {
                  "met": true,
                  "factor": "onset_at_least_6_months"
                }
              ],
              "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.",
              "rome_iv_nbs": true,
              "nbs_features_met": 2,
              "formula_expression": "rome_iv_nbs iff chronic_or_frequently_recurring_abdominal_pain_on_narcotics and pain_not_explained_by_current_or_previous_gi_diagnosis and nbs_features_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; nbs_features_met counts pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics, marked_worsening_when_dose_wanes_improvement_when_reinstituted, and progression_of_frequency_duration_intensity_of_pain_episodes (Keefer 2016 Rome IV D2 Narcotic Bowel Syndrome / opioid-induced GI hyperalgesia)"
            },
            {
              "formula": "rome_iv_nbs",
              "citation": {
                "id": "keefer-2016",
                "doi": "10.1053/j.gastro.2016.02.034",
                "pmid": "27144628",
                "title": "Centrally Mediated Disorders of Gastrointestinal Pain",
                "source": "Gastroenterology. 2016;150(6):1408-1419",
                "authors": "Keefer L, Drossman DA, Guthrie E, Simrén M, Tillisch K, Olden K, Whorwell PJ"
              },
              "criteria": [
                {
                  "met": true,
                  "factor": "chronic_or_frequently_recurring_abdominal_pain_on_narcotics"
                },
                {
                  "met": true,
                  "factor": "pain_not_explained_by_current_or_previous_gi_diagnosis"
                },
                {
                  "met": true,
                  "factor": "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics"
                },
                {
                  "met": true,
                  "factor": "marked_worsening_when_dose_wanes_improvement_when_reinstituted"
                },
                {
                  "met": false,
                  "factor": "progression_of_frequency_duration_intensity_of_pain_episodes"
                },
                {
                  "met": true,
                  "value": 2,
                  "factor": "nbs_features_ge_2"
                },
                {
                  "met": true,
                  "factor": "fulfilled_last_3_months"
                },
                {
                  "met": true,
                  "factor": "onset_at_least_6_months"
                }
              ],
              "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.",
              "rome_iv_nbs": true,
              "nbs_features_met": 2,
              "formula_expression": "rome_iv_nbs iff chronic_or_frequently_recurring_abdominal_pain_on_narcotics and pain_not_explained_by_current_or_previous_gi_diagnosis and nbs_features_met >= 2 and fulfilled_last_3_months and onset_at_least_6_months; nbs_features_met counts pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics, marked_worsening_when_dose_wanes_improvement_when_reinstituted, and progression_of_frequency_duration_intensity_of_pain_episodes (Keefer 2016 Rome IV D2 Narcotic Bowel Syndrome / opioid-induced GI hyperalgesia)"
            }
          ]
        }
      },
      "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": [
                      "chronic_or_frequently_recurring_abdominal_pain_on_narcotics",
                      "pain_not_explained_by_current_or_previous_gi_diagnosis",
                      "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics",
                      "marked_worsening_when_dose_wanes_improvement_when_reinstituted",
                      "progression_of_frequency_duration_intensity_of_pain_episodes",
                      "fulfilled_last_3_months",
                      "onset_at_least_6_months"
                    ],
                    "properties": {
                      "fulfilled_last_3_months": {
                        "type": "boolean",
                        "description": "Criteria fulfilled for the last 3 months, as assigned (Keefer 2016). true or false as assigned by the caller. magent does not take a history."
                      },
                      "onset_at_least_6_months": {
                        "type": "boolean",
                        "description": "Symptom onset at least 6 months prior to diagnosis, as assigned (Keefer 2016). true or false as assigned by the caller. magent does not take a history."
                      },
                      "pain_not_explained_by_current_or_previous_gi_diagnosis": {
                        "type": "boolean",
                        "description": "The nature and intensity of the pain is not explained by a current or previous GI diagnosis (a structural diagnosis may exist but is not sufficient to explain the pain), as assigned (Keefer 2016). true or false as assigned by the caller. magent does not examine the patient."
                      },
                      "chronic_or_frequently_recurring_abdominal_pain_on_narcotics": {
                        "type": "boolean",
                        "description": "Chronic or frequently recurring abdominal pain treated with acute high-dose or chronic narcotics; pain must occur most days, as assigned (Keefer 2016 Rome IV NBS / D2). Patients often take about 75 mg oral morphine equivalent; no particular time frame or dosage is required. true or false as assigned by the caller. magent does not examine the patient or judge opioid dose."
                      },
                      "progression_of_frequency_duration_intensity_of_pain_episodes": {
                        "type": "boolean",
                        "description": "Progression of the frequency, duration, and intensity of pain episodes (one of three NBS features; at least two required). true or false as assigned by the caller."
                      },
                      "marked_worsening_when_dose_wanes_improvement_when_reinstituted": {
                        "type": "boolean",
                        "description": "Marked worsening of pain when the narcotic dose wanes and improvement when narcotics are re-instituted (soar and crash; one of three NBS features; at least two required). true or false as assigned by the caller."
                      },
                      "pain_worsens_or_incompletely_resolves_with_continued_or_escalating_narcotics": {
                        "type": "boolean",
                        "description": "Pain worsens or incompletely resolves with continued or escalating dosages of narcotics (one of three NBS features; at least two required). true or false as assigned by the caller."
                      }
                    }
                  },
                  "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 01:38Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-23 23:15Z
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. 9 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/rome_iv_nbs, 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.