Chong 2010 RIPASA score from 15 caller-assigned findings (half-points; max 16)
Chong 2010 RIPASA score from 15 caller-assigned findings (half-points; max 16). Age <40 scores 1.0, ≥40 scores 0.5; male 1.0, female 0.5; symptoms <48h 1.0, otherwise 0.5. Guarding and Rovsing 2.0 each. Fever, raised WCC, and foreign NRIC are caller-assigned; magent does not apply a °C or WBC cutoff. Derivation ROC: <7.5 below_cutoff, ≥7.5 at_or_above_cutoff. Not a diagnosis or operating-room protocol. magent does not examine the abdomen.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
302 msmedian answer time
$0.005listed price per call
$0.007price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.magentlab.com/api/calc/ripasa
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 302 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"age": 50,
"anorexia": false,
"fever": false,
"foreign_nric": false,
"guarding": false,
"migration_to_rif": false,
"nausea_vomiting": false,
"negative_urinalysis": false,
"raised_wcc": false,
"rebound_tenderness": false,
"rif_pain": false,
"rif_tenderness": false,
"rovsing_sign": false,
"sex": "female",
"symptoms_lt_48h": false
},
{
"age": 50,
"anorexia": false,
"fever": false,
"foreign_nric": false,
"guarding": false,
"migration_to_rif": false,
"nausea_vomiting": false,
"negative_urinalysis": false,
"raised_wcc": false,
"rebound_tenderness": false,
"rif_pain": false,
"rif_tenderness": false,
"rovsing_sign": false,
"sex": "female",
"symptoms_lt_48h": false
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"age": {
"description": "Age in years as an integer from 1 to 120 (Chong 2010). <40 scores 1.0; \u226540 scores 0.5 (age 40 is the \u226540 arm). magent does not assign age.",
"type": "integer"
},
"anorexia": {
"description": "Anorexia (Chong 2010). true scores 1.0. magent does not take a history.",
"type": "boolean"
},
"fever": {
"description": "Caller-assigned fever flag (Chong 2010). true scores 1.0. magent does not apply a \u00b0C cutoff.",
"type": "boolean"
},
"foreign_nric": {
"description": "Caller-assigned foreign national registration identity card item (Chong 2010). true scores 1.0. magent does not read identity documents.",
"type": "boolean"
},
"guarding": {
"description": "Guarding (Chong 2010). true scores 2.0. magent does not examine the abdomen.",
"type": "boolean"
},
"migration_to_rif": {
"description": "Migration of pain to the right iliac fossa (Chong 2010). true scores 0.5. magent does not take a history.",
"type": "boolean"
},
"nausea_vomiting": {
"description": "Nausea or vomiting (Chong 2010). true scores 1.0. magent does not take a history.",
"type": "boolean"
},
"negative_urinalysis": {
"description": "Negative urinalysis (Chong 2010). true scores 1.0. magent does not assay urine.",
"type": "boolean"
},
"raised_wcc": {
"description": "Caller-assigned raised white-cell-count flag (Chong 2010). true scores 1.0. magent does not apply a WBC cutoff.",
"type": "boolean"
},
"rebound_tenderness": {
"description": "Rebound tenderness (Chong 2010). true scores 1.0. magent does not examine the abdomen.",
"type": "boolean"
},
"rif_pain": {
"description": "Pain in the right iliac fossa (Chong 2010). true scores 0.5. magent does not take a history.",
"type": "boolean"
},
"rif_tenderness": {
"description": "Right-iliac-fossa tenderness (Chong 2010). true scores 1.0. magent does not examine the abdomen.",
"type": "boolean"
},
"rovsing_sign": {
"description": "Rovsing sign (Chong 2010). true scores 2.0. magent does not examine the abdomen.",
"type": "boolean"
},
"sex": {
"description": "Caller-assigned sex (Chong 2010). male scores 1.0; female scores 0.5. magent does not assign sex.",
"enum": [
"female",
"male"
],
"type": "string"
},
"symptoms_lt_48h": {
"description": "true when symptom duration is under 48 hours (Chong 2010 <48h arm, 1.0). false scores 0.5 (the >48h arm; 48 hours is locked to this arm). magent does not timestamp onset.",
"type": "boolean"
}
},
"required": [
"age",
"sex",
"rif_pain",
"migration_to_rif",
"nausea_vomiting",
"anorexia",
"symptoms_lt_48h",
"rif_tenderness",
"guarding",
"rebound_tenderness",
"rovsing_sign",
"fever",
"raised_wcc",
"negative_urinalysis",
"foreign_nric"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}