magent

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

SearchLiveeip155:8453Exactvia cdp
ChipHead-ctEmergencyTraumaMinor-head-injury
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 13:21Z
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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  "resource": {
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    "tags": [
      "chip",
      "head-ct",
      "emergency",
      "trauma",
      "minor-head-injury"
    ],
    "mimeType": "application/json",
    "description": "Smits 2007 CHIP rule (adults ≥16, GCS 13-15). CT if ≥1 major (pedestrian/cyclist vs vehicle, ejected, vomiting, PTA ≥4 h, skull-fracture signs, GCS <15, GCS drop ≥2 at 1 h, anticoagulants, posttraumatic seizure, age ≥60) or ≥2 minor (fall from elevation, persistent anterograde amnesia, PTA 2 to <4 h, skull contusion, neurologic deficit, LOC, GCS drop of 1 at 1 h, age 40-60). Not a diagnosis; not Canadian CT Head, NEXUS, PECARN, or 2022 CHIP. magent does not examine the patient.",
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  "extensions": {
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            "citation": {
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              {
                "met": false,
                "factor": "gcs_deterioration_ge_2"
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              {
                "met": false,
                "factor": "anticoagulant_therapy"
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              {
                "met": false,
                "factor": "posttraumatic_seizure"
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              {
                "met": false,
                "value": 30,
                "factor": "age_ge_60"
              },
              {
                "met": false,
                "factor": "fall_from_any_elevation"
              },
              {
                "met": false,
                "factor": "persistent_anterograde_amnesia"
              },
              {
                "met": false,
                "factor": "pta_2_to_lt_4h"
              },
              {
                "met": false,
                "factor": "skull_contusion"
              },
              {
                "met": false,
                "factor": "neurologic_deficit"
              },
              {
                "met": false,
                "factor": "loss_of_consciousness"
              },
              {
                "met": false,
                "factor": "gcs_deterioration_1"
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              {
                "met": false,
                "value": 30,
                "factor": "age_40_to_60"
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            ],
            "age_years": 30,
            "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.",
            "major_count": 0,
            "minor_count": 0,
            "ct_indicated": false,
            "formula_expression": "ct indicated if ≥1 major (pedestrian_or_cyclist_vs_vehicle, ejected_from_vehicle, vomiting, pta_ge_4h, clinical_signs_skull_fracture, gcs < 15, gcs_deterioration_ge_2, anticoagulant_therapy, posttraumatic_seizure, age ≥ 60) or ≥2 minor (fall_from_any_elevation, persistent_anterograde_amnesia, pta_2_to_lt_4h, skull_contusion, neurologic_deficit, loss_of_consciousness, gcs_deterioration_1, age 40-60)"
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        "required": [
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        "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",
                  "gcs",
                  "pedestrian_or_cyclist_vs_vehicle",
                  "ejected_from_vehicle",
                  "vomiting",
                  "pta_ge_4h",
                  "clinical_signs_skull_fracture",
                  "gcs_deterioration_ge_2",
                  "anticoagulant_therapy",
                  "posttraumatic_seizure",
                  "fall_from_any_elevation",
                  "persistent_anterograde_amnesia",
                  "pta_2_to_lt_4h",
                  "skull_contusion",
                  "neurologic_deficit",
                  "loss_of_consciousness",
                  "gcs_deterioration_1"
                ],
                "properties": {
                  "age": {
                    "type": "integer",
                    "description": "Age in years (integer 16-120). Age ≥60 is a major criterion. Age 40-59 is the 40-60 y minor band; 39 is neither. The published rule is for patients ≥16 years."
                  },
                  "gcs": {
                    "type": "integer",
                    "description": "Glasgow Coma Scale integer 13-15 as published. GCS 13 or 14 (GCS <15) is a major criterion; 15 is not. magent does not assign GCS from an exam."
                  },
                  "vomiting": {
                    "type": "boolean",
                    "description": "Vomiting (Smits 2007 major). true or false as assigned by the caller. magent does not take a vomit count."
                  },
                  "pta_ge_4h": {
                    "type": "boolean",
                    "description": "Posttraumatic amnesia ≥4 hours (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with pta_2_to_lt_4h. magent does not measure amnesia duration."
                  },
                  "pta_2_to_lt_4h": {
                    "type": "boolean",
                    "description": "Posttraumatic amnesia of 2 to <4 hours (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with pta_ge_4h. magent does not measure amnesia duration."
                  },
                  "skull_contusion": {
                    "type": "boolean",
                    "description": "Contusion of the skull (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the scalp."
                  },
                  "neurologic_deficit": {
                    "type": "boolean",
                    "description": "Neurologic deficit (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the patient."
                  },
                  "gcs_deterioration_1": {
                    "type": "boolean",
                    "description": "GCS deterioration of 1 point 1 hour after presentation (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_ge_2. magent does not assign GCS change."
                  },
                  "ejected_from_vehicle": {
                    "type": "boolean",
                    "description": "Ejected from vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism."
                  },
                  "anticoagulant_therapy": {
                    "type": "boolean",
                    "description": "Use of anticoagulant therapy (Smits 2007 major). true or false as assigned by the caller. This is the 2007 simple rule, not the 2022 CHIP update. magent does not interpret a coagulation assay."
                  },
                  "loss_of_consciousness": {
                    "type": "boolean",
                    "description": "Loss of consciousness (Smits 2007 minor). true or false as assigned by the caller. magent does not take a history."
                  },
                  "posttraumatic_seizure": {
                    "type": "boolean",
                    "description": "Posttraumatic seizure (Smits 2007 major). true or false as assigned by the caller. magent does not witness a seizure."
                  },
                  "gcs_deterioration_ge_2": {
                    "type": "boolean",
                    "description": "GCS deterioration ≥2 points 1 hour after presentation (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_1. magent does not assign GCS change."
                  },
                  "fall_from_any_elevation": {
                    "type": "boolean",
                    "description": "Fall from any elevation (Smits 2007 minor). true or false as assigned by the caller. magent does not classify mechanism."
                  },
                  "clinical_signs_skull_fracture": {
                    "type": "boolean",
                    "description": "Clinical signs of skull fracture (Smits 2007 major): any injury that suggests a skull fracture, such as palpable discontinuity of the skull, leakage of cerebrospinal fluid, raccoon-eye bruising, and bleeding from the ear, as assigned by the caller. true or false. magent does not examine the patient."
                  },
                  "persistent_anterograde_amnesia": {
                    "type": "boolean",
                    "description": "Persistent anterograde amnesia, any deficit of short-term memory (Smits 2007 minor). true or false as assigned by the caller. magent does not test memory."
                  },
                  "pedestrian_or_cyclist_vs_vehicle": {
                    "type": "boolean",
                    "description": "Pedestrian or cyclist versus vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
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            "properties": {
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              },
              "example": {
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              }
            }
          }
        }
      }
    }
  },
  "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
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    "amount": "5000",
    "scheme": "exact",
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    "maxTimeoutSeconds": 600
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]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
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            {
              "age": 30,
              "gcs": 15,
              "vomiting": false,
              "pta_ge_4h": false,
              "pta_2_to_lt_4h": false,
              "skull_contusion": false,
              "neurologic_deficit": false,
              "gcs_deterioration_1": false,
              "ejected_from_vehicle": false,
              "anticoagulant_therapy": false,
              "loss_of_consciousness": false,
              "posttraumatic_seizure": false,
              "gcs_deterioration_ge_2": false,
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              "persistent_anterograde_amnesia": false,
              "pedestrian_or_cyclist_vs_vehicle": false
            },
            {
              "age": 30,
              "gcs": 15,
              "vomiting": false,
              "pta_ge_4h": false,
              "pta_2_to_lt_4h": false,
              "skull_contusion": false,
              "neurologic_deficit": false,
              "gcs_deterioration_1": false,
              "ejected_from_vehicle": false,
              "anticoagulant_therapy": false,
              "loss_of_consciousness": false,
              "posttraumatic_seizure": false,
              "gcs_deterioration_ge_2": false,
              "fall_from_any_elevation": false,
              "clinical_signs_skull_fracture": false,
              "persistent_anterograde_amnesia": false,
              "pedestrian_or_cyclist_vs_vehicle": false
            }
          ]
        },
        "type": "http",
        "method": "POST"
      },
      "output": {
        "type": "json",
        "example": {
          "path": "/api/calc/chip",
          "count": 2,
          "items": [
            {
              "gcs": 15,
              "formula": "chip",
              "citation": {
                "id": "smits-2007",
                "doi": "10.7326/0003-4819-146-6-200703200-00004",
                "pmid": "17371884",
                "title": "Predicting intracranial traumatic findings on computed tomography in patients with minor head injury: the CHIP prediction rule",
                "source": "Ann Intern Med. 2007;146(6):397-405",
                "authors": "Smits M, Dippel DW, Steyerberg EW, et al."
              },
              "criteria": [
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                  "met": false,
                  "factor": "pedestrian_or_cyclist_vs_vehicle"
                },
                {
                  "met": false,
                  "factor": "ejected_from_vehicle"
                },
                {
                  "met": false,
                  "factor": "vomiting"
                },
                {
                  "met": false,
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                },
                {
                  "met": false,
                  "factor": "clinical_signs_skull_fracture"
                },
                {
                  "met": false,
                  "value": 15,
                  "factor": "gcs_lt_15"
                },
                {
                  "met": false,
                  "factor": "gcs_deterioration_ge_2"
                },
                {
                  "met": false,
                  "factor": "anticoagulant_therapy"
                },
                {
                  "met": false,
                  "factor": "posttraumatic_seizure"
                },
                {
                  "met": false,
                  "value": 30,
                  "factor": "age_ge_60"
                },
                {
                  "met": false,
                  "factor": "fall_from_any_elevation"
                },
                {
                  "met": false,
                  "factor": "persistent_anterograde_amnesia"
                },
                {
                  "met": false,
                  "factor": "pta_2_to_lt_4h"
                },
                {
                  "met": false,
                  "factor": "skull_contusion"
                },
                {
                  "met": false,
                  "factor": "neurologic_deficit"
                },
                {
                  "met": false,
                  "factor": "loss_of_consciousness"
                },
                {
                  "met": false,
                  "factor": "gcs_deterioration_1"
                },
                {
                  "met": false,
                  "value": 30,
                  "factor": "age_40_to_60"
                }
              ],
              "age_years": 30,
              "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.",
              "major_count": 0,
              "minor_count": 0,
              "ct_indicated": false,
              "formula_expression": "ct indicated if ≥1 major (pedestrian_or_cyclist_vs_vehicle, ejected_from_vehicle, vomiting, pta_ge_4h, clinical_signs_skull_fracture, gcs < 15, gcs_deterioration_ge_2, anticoagulant_therapy, posttraumatic_seizure, age ≥ 60) or ≥2 minor (fall_from_any_elevation, persistent_anterograde_amnesia, pta_2_to_lt_4h, skull_contusion, neurologic_deficit, loss_of_consciousness, gcs_deterioration_1, age 40-60)"
            },
            {
              "gcs": 15,
              "formula": "chip",
              "citation": {
                "id": "smits-2007",
                "doi": "10.7326/0003-4819-146-6-200703200-00004",
                "pmid": "17371884",
                "title": "Predicting intracranial traumatic findings on computed tomography in patients with minor head injury: the CHIP prediction rule",
                "source": "Ann Intern Med. 2007;146(6):397-405",
                "authors": "Smits M, Dippel DW, Steyerberg EW, et al."
              },
              "criteria": [
                {
                  "met": false,
                  "factor": "pedestrian_or_cyclist_vs_vehicle"
                },
                {
                  "met": false,
                  "factor": "ejected_from_vehicle"
                },
                {
                  "met": false,
                  "factor": "vomiting"
                },
                {
                  "met": false,
                  "factor": "pta_ge_4h"
                },
                {
                  "met": false,
                  "factor": "clinical_signs_skull_fracture"
                },
                {
                  "met": false,
                  "value": 15,
                  "factor": "gcs_lt_15"
                },
                {
                  "met": false,
                  "factor": "gcs_deterioration_ge_2"
                },
                {
                  "met": false,
                  "factor": "anticoagulant_therapy"
                },
                {
                  "met": false,
                  "factor": "posttraumatic_seizure"
                },
                {
                  "met": false,
                  "value": 30,
                  "factor": "age_ge_60"
                },
                {
                  "met": false,
                  "factor": "fall_from_any_elevation"
                },
                {
                  "met": false,
                  "factor": "persistent_anterograde_amnesia"
                },
                {
                  "met": false,
                  "factor": "pta_2_to_lt_4h"
                },
                {
                  "met": false,
                  "factor": "skull_contusion"
                },
                {
                  "met": false,
                  "factor": "neurologic_deficit"
                },
                {
                  "met": false,
                  "factor": "loss_of_consciousness"
                },
                {
                  "met": false,
                  "factor": "gcs_deterioration_1"
                },
                {
                  "met": false,
                  "value": 30,
                  "factor": "age_40_to_60"
                }
              ],
              "age_years": 30,
              "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.",
              "major_count": 0,
              "minor_count": 0,
              "ct_indicated": false,
              "formula_expression": "ct indicated if ≥1 major (pedestrian_or_cyclist_vs_vehicle, ejected_from_vehicle, vomiting, pta_ge_4h, clinical_signs_skull_fracture, gcs < 15, gcs_deterioration_ge_2, anticoagulant_therapy, posttraumatic_seizure, age ≥ 60) or ≥2 minor (fall_from_any_elevation, persistent_anterograde_amnesia, pta_2_to_lt_4h, skull_contusion, neurologic_deficit, loss_of_consciousness, gcs_deterioration_1, age 40-60)"
            }
          ]
        }
      },
      "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",
                      "gcs",
                      "pedestrian_or_cyclist_vs_vehicle",
                      "ejected_from_vehicle",
                      "vomiting",
                      "pta_ge_4h",
                      "clinical_signs_skull_fracture",
                      "gcs_deterioration_ge_2",
                      "anticoagulant_therapy",
                      "posttraumatic_seizure",
                      "fall_from_any_elevation",
                      "persistent_anterograde_amnesia",
                      "pta_2_to_lt_4h",
                      "skull_contusion",
                      "neurologic_deficit",
                      "loss_of_consciousness",
                      "gcs_deterioration_1"
                    ],
                    "properties": {
                      "age": {
                        "type": "integer",
                        "description": "Age in years (integer 16-120). Age ≥60 is a major criterion. Age 40-59 is the 40-60 y minor band; 39 is neither. The published rule is for patients ≥16 years."
                      },
                      "gcs": {
                        "type": "integer",
                        "description": "Glasgow Coma Scale integer 13-15 as published. GCS 13 or 14 (GCS <15) is a major criterion; 15 is not. magent does not assign GCS from an exam."
                      },
                      "vomiting": {
                        "type": "boolean",
                        "description": "Vomiting (Smits 2007 major). true or false as assigned by the caller. magent does not take a vomit count."
                      },
                      "pta_ge_4h": {
                        "type": "boolean",
                        "description": "Posttraumatic amnesia ≥4 hours (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with pta_2_to_lt_4h. magent does not measure amnesia duration."
                      },
                      "pta_2_to_lt_4h": {
                        "type": "boolean",
                        "description": "Posttraumatic amnesia of 2 to <4 hours (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with pta_ge_4h. magent does not measure amnesia duration."
                      },
                      "skull_contusion": {
                        "type": "boolean",
                        "description": "Contusion of the skull (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the scalp."
                      },
                      "neurologic_deficit": {
                        "type": "boolean",
                        "description": "Neurologic deficit (Smits 2007 minor). true or false as assigned by the caller. magent does not examine the patient."
                      },
                      "gcs_deterioration_1": {
                        "type": "boolean",
                        "description": "GCS deterioration of 1 point 1 hour after presentation (Smits 2007 minor). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_ge_2. magent does not assign GCS change."
                      },
                      "ejected_from_vehicle": {
                        "type": "boolean",
                        "description": "Ejected from vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism."
                      },
                      "anticoagulant_therapy": {
                        "type": "boolean",
                        "description": "Use of anticoagulant therapy (Smits 2007 major). true or false as assigned by the caller. This is the 2007 simple rule, not the 2022 CHIP update. magent does not interpret a coagulation assay."
                      },
                      "loss_of_consciousness": {
                        "type": "boolean",
                        "description": "Loss of consciousness (Smits 2007 minor). true or false as assigned by the caller. magent does not take a history."
                      },
                      "posttraumatic_seizure": {
                        "type": "boolean",
                        "description": "Posttraumatic seizure (Smits 2007 major). true or false as assigned by the caller. magent does not witness a seizure."
                      },
                      "gcs_deterioration_ge_2": {
                        "type": "boolean",
                        "description": "GCS deterioration ≥2 points 1 hour after presentation (Smits 2007 major). true or false as assigned by the caller. Mutually exclusive with gcs_deterioration_1. magent does not assign GCS change."
                      },
                      "fall_from_any_elevation": {
                        "type": "boolean",
                        "description": "Fall from any elevation (Smits 2007 minor). true or false as assigned by the caller. magent does not classify mechanism."
                      },
                      "clinical_signs_skull_fracture": {
                        "type": "boolean",
                        "description": "Clinical signs of skull fracture (Smits 2007 major): any injury that suggests a skull fracture, such as palpable discontinuity of the skull, leakage of cerebrospinal fluid, raccoon-eye bruising, and bleeding from the ear, as assigned by the caller. true or false. magent does not examine the patient."
                      },
                      "persistent_anterograde_amnesia": {
                        "type": "boolean",
                        "description": "Persistent anterograde amnesia, any deficit of short-term memory (Smits 2007 minor). true or false as assigned by the caller. magent does not test memory."
                      },
                      "pedestrian_or_cyclist_vs_vehicle": {
                        "type": "boolean",
                        "description": "Pedestrian or cyclist versus vehicle (Smits 2007 major). true or false as assigned by the caller. magent does not classify mechanism."
                      }
                    }
                  },
                  "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 13:21Z
Last indexed by Roundhouse
2026-09-07 06:20Z
Last enriched (probe, favicon, geo)
2026-09-22 17:15Z
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/chip, 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.