Cohn 2012 Rule of 7s
Cohn 2012 Rule of 7s. Low-risk for Lyme meningitis iff all three hold: headache duration <7 days, CSF mononuclear cells <70%, and no seventh or other cranial-nerve palsy. Seven days and 70% are not low-risk. The caller assigns duration, CSF differential, and palsy. magent does not examine nerves or count CSF cells. Not a Lyme diagnosis, not a medical device, and not a treatment or discharge order. Does not compute Avery 2006 logistic probabilities.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
255 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/rule_7s
| 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 | $0.007 | 255 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"cranial_nerve_palsy": false,
"csf_mononuclear_percent": 40,
"headache_days": 3
},
{
"cranial_nerve_palsy": false,
"csf_mononuclear_percent": 40,
"headache_days": 3
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"cranial_nerve_palsy": {
"description": "Seventh or other cranial-nerve palsy. true or false as assigned by the caller. Low-risk criterion holds when false (palsy absent). magent does not examine nerves.",
"type": "boolean"
},
"csf_mononuclear_percent": {
"description": "CSF mononuclear cell percent (0-100). Low-risk criterion holds when strictly less than 70. Seventy percent is not low-risk. magent does not count CSF cells.",
"type": "number"
},
"headache_days": {
"description": "Duration of headache in days (integer 0-90). Low-risk criterion holds when strictly less than 7. Seven days is not low-risk. magent does not take a history.",
"type": "integer"
}
},
"required": [
"headache_days",
"csf_mononuclear_percent",
"cranial_nerve_palsy"
],
"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"
}