# magent IVT Contraindications Checker (Powers 2018 Table 6 Class III: Harm)

> magent IVT Contraindications Checker (Powers 2018 Table 6 Class III: Harm) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Evaluates 15 caller-assigned boolean flags to determine whether IV alteplase (IVT) is contraindicated per Powers 2018 AHA/ASA Table 6 Class III: Harm criteria

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/ivt_contraindications
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/magent-ivt-contraindications-checker-powers-2018-table-6-class-iii-harm-17b28b31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5elfJQy7mxf3NMMdxyVP4

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability magent-ivt-contraindications-checker-powers-2018-table-6-class-iii-harm-17b28b31
```

Example prompt: My stroke patient has a history of ICH and was on LMWH within the last 24 hours — can you check whether IVT is contraindicated using the Powers 2018 Table 6 Class III Harm criteria? All other contraindication flags are false.

## When to prefer this

Use this endpoint when you need a fast, rule-based check of the 15 Powers 2018 AHA/ASA Table 6 Class III Harm contraindications to IV alteplase in acute ischemic stroke, and all flags have already been clinically assessed by the caller. Do not use it to determine Class I eligibility, compute dosing, interpret CT images, or assay lab values. Prefer this over manual checklist review when building automated stroke triage workflows or clinical decision support pipelines.

## Known failure modes

- Missing any of the 15 required boolean query parameters returns a validation error
- Passing non-boolean values for flags causes schema rejection
- Misassignment of flags by the caller (e.g. not reading CT correctly) leads to clinically incorrect output — the API trusts caller input entirely
- Network timeout or service unavailability returns a 5xx error
- Payment failure (x402) blocks the request if USDC balance is insufficient

## How this service works

Powers 2018 Table 6 Class III Harm IVT. contraindicated iff any of 15 caller flags: CT ICH; recent ischemic stroke, severe head trauma, or intracranial/spinal surgery; posttraumatic infarction; history of ICH; SAH presentation; GI malignancy or bleed 21d; coagulopathy; LMWH 24h; DOAC not cleared; GP IIb/IIIa; infective endocarditis; aortic arch dissection; intra-axial neoplasm. Not Class I eligibility, time window, or a dose. magent does not read CT or assay labs. Not a treatment order.

## Output

Returns a structured result indicating whether IV alteplase is contraindicated (true/false) and which of the 15 Powers 2018 Table 6 Class III Harm flags were active. Does not compute dosing, assess Class I eligibility, read CT images, or interpret lab values — all flags are caller-assigned.

## Request schema (JSON Schema)

```json
{
 "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": [
      "ct_ich",
      "ischemic_stroke_within_3_mo",
      "severe_head_trauma_within_3_mo",
      "posttraumatic_infarction_in_hospital",
      "intracranial_spinal_surgery_within_3_mo",
      "history_ich",
      "sah_presentation",
      "gi_malignancy_or_gi_bleed_21d",
      "coagulopathy",
      "lmwh_treatment_dose_within_24h",
      "doac_not_cleared",
      "gp2b3a_concurrent",
      "infective_endocarditis",
      "aortic_arch_dissection",
      "intra_axial_neoplasm"
     ],
     "properties": {
      "ct_ich": {
       "type": "boolean",
       "description": "CT reveals acute intracranial hemorrhage as assigned by the caller (Powers 2018 Table 6 Class III: Harm). true or false. magent does not read CT."
      },
      "history_ich": {
       "type": "boolean",
       "description": "History of intracranial hemorrhage as assigned by the caller (Powers 2018 Table 6 Class III: Harm). true or false. magent does not read prior imaging."
      },
      "coagulopathy": {
       "type": "boolean",
       "description": "Caller-assigned coagulopathy as in Table 6 (platelets <100000/mm3 or INR >1.7 or aPTT >40 s or PT >15 s). One flag. true or false. magent does not assay labs."
      },
      "doac_not_cleared": {
       "type": "boolean",
       "description": "Taking a direct thrombin or factor Xa inhibitor AND labs not documented normal AND last dose not >48 h with normal renal function, as assigned by the caller from that Table 6 row. true or false. magent does not assay labs."
      },
      "sah_presentation": {
       "type": "boolean",
       "description": "Presentation most consistent with subarachnoid hemorrhage as assigned by the caller (Powers 2018 Table 6 Class III: Harm). true or false. magent does not examine the patient."
      },
      "gp2b3a_concurrent": {
       "type": "boolean",
       "description": "Concurrent GP IIb/IIIa inhibitor as assigned by the caller (Powers 
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/magent-ivt-contraindications-checker-powers-2018-table-6-class-iii-harm-17b28b31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)