ASAS 2011 peripheral SpA classification (Rudwaleit set 2D / fig 1 + table 5)
ASAS 2011 peripheral SpA classification (Rudwaleit set 2D / fig 1 + table 5). Required: current arthritis, enthesitis, or dactylitis. Arm A: ≥1 of psoriasis, IBD, preceding infection, HLA-B27, uveitis, sacroiliitis on imaging. Arm B: ≥2 of arthritis, enthesitis, dactylitis, IBP in the past, family history of SpA. Not a diagnosis. Not ASAS 2009 axial. Not ESSG/Amor. magent does not examine joints or assay HLA-B27.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
320 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/asas_peripheral_spa
| 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 | $0.007 | 320 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"arthritis": true,
"dactylitis": false,
"enthesitis": false,
"family_history_spa": false,
"hla_b27": false,
"ibd": false,
"ibp_past": false,
"preceding_infection": false,
"psoriasis": true,
"sacroiliitis_on_imaging": false,
"uveitis": false
},
{
"arthritis": true,
"dactylitis": false,
"enthesitis": false,
"family_history_spa": false,
"hla_b27": false,
"ibd": false,
"ibp_past": false,
"preceding_infection": false,
"psoriasis": true,
"sacroiliitis_on_imaging": false,
"uveitis": false
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"arthritis": {
"description": "Current peripheral arthritis (usually asymmetric and/or of lower limbs) as assigned by the caller (Rudwaleit 2011 set 2D entry). Table 5 additional feature is past or present synovitis diagnosed by a physician; the same caller flag counts toward arm B. true or false. magent does not examine joints.",
"type": "boolean"
},
"dactylitis": {
"description": "Current dactylitis as assigned by the caller (Rudwaleit 2011 set 2D entry). Table 5 additional feature is past or present dactylitis diagnosed by a physician; the same caller flag counts toward arm B. true or false. magent does not examine digits.",
"type": "boolean"
},
"enthesitis": {
"description": "Current enthesitis as assigned by the caller (Rudwaleit 2011 set 2D entry). Table 5 additional feature is past or present spontaneous pain or tenderness at an enthesis; the same caller flag counts toward arm B. true or false. magent does not examine entheses.",
"type": "boolean"
},
"family_history_spa": {
"description": "Family history of SpA as assigned by the caller (Rudwaleit 2011 arm B): first-degree or second-degree relatives with ankylosing spondylitis, psoriasis, acute uveitis, reactive arthritis, or IBD. true or false. magent does not take a pedigree.",
"type": "boolean"
},
"hla_b27": {
"description": "HLA-B27 positive as assigned by the caller (Rudwaleit 2011 arm A). true or false. magent does not assay HLA-B27.",
"type": "boolean"
},
"ibd": {
"description": "Past or present Crohn's disease or ulcerative colitis diagnosed by a physician, as assigned by the caller (Rudwaleit 2011 arm A). true or false. magent does not diagnose IBD.",
"type": "boolean"
},
"ibp_past": {
"description": "Inflammatory back pain in the past according to experts, as assigned by the caller (Rudwaleit 2011 arm B). true or false. magent does not take a history.",
"type": "boolean"
},
"preceding_infection": {
"description": "Urethritis/cervicitis or diarrhoea within 1 month before arthritis, enthesitis, or dactylitis, as assigned by the caller (Rudwaleit 2011 arm A). true or false. magent does not take a history.",
"type": "boolean"
},
"psoriasis": {
"description": "Past or present psoriasis diagnosed by a physician, as assigned by the caller (Rudwaleit 2011 arm A). true or false. magent does not examine skin.",
"type": "boolean"
},
"sacroiliitis_on_imaging": {
"description": "Sacroiliitis on imaging as assigned by the caller (Rudwaleit 2011 arm A): definite radiographic sacroiliitis (bilateral grade 2\u20134 or unilateral grade 3\u20134) or active inflammation on MRI highly suggestive of SpA-associated sacroiliitis. true or false. magent does not read films.",
"type": "boolean"
},
"uveitis": {
"description": "Past or present uveitis confirmed by an ophthalmologist, as assigned by the caller (Rudwaleit 2011 arm A). true or false. magent does not examine the eye.",
"type": "boolean"
}
},
"required": [
"arthritis",
"enthesitis",
"dactylitis",
"psoriasis",
"ibd",
"preceding_infection",
"hla_b27",
"uveitis",
"sacroiliitis_on_imaging",
"ibp_past",
"family_history_spa"
],
"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": [
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},
"required": [
"input"
],
"type": "object"
}