# Study Notes Missingness Co-occurrence Analyzer

> Study Notes Missingness Co-occurrence Analyzer is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.020296/call, status unknown (last checked 2026-10-28).

Counts joint absences of source, locator, and confidence-basis metadata fields across study notes without imputation or quality scoring

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/context/study-notes/missingness-cooccurrence?utm_source=zero.xyz
- Price: $0.020296/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/study-notes-missingness-co-occurrence-analyzer-a599219c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YFvjdoNZCvMDU7tGqhtcr

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 study-notes-missingness-co-occurrence-analyzer-a599219c -d '<json body>'
```

Example prompt: Can you check these 10 study notes for joint missingness in their source, locator, and confidence-basis metadata — no imputation, just raw co-occurrence counts? They're all public, nonpersonal metadata only.

## When to prefer this

Choose this endpoint when you need a raw, unimputed count of joint metadata absences (source, locator, confidence-basis) across study notes and do not need quality scoring or data filling. Ideal for pre-analysis audits, systematic gap detection, and research pipelines that require strict nonpersonal, offline metadata handling with public or synthetic data only.

## Known failure modes

- notes array empty or exceeds 32 items — validation error
- nonpersonalMetadata not set to true — request rejected
- dataClass not one of 'public' or 'synthetic' — schema validation failure
- malformed note objects in array — parsing error
- service unavailable — transient 5xx error

## How this service works

Count joint absence of source, locator and confidence-basis metadata in study notes without imputation or a quality score. Offline typed nonpersonal metadata only. Result retention: 24 hours; minimal receipt metadata: 90 days.

## Output

Returns counts and co-occurrence patterns of joint absences across source, locator, and confidence-basis metadata fields in the submitted study notes, without any imputation or quality scoring applied. Results are retained for 24 hours; minimal receipt metadata is retained for 90 days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "notes": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "dataClass": {
   "enum": [
    "public",
    "synthetic"
   ],
   "type": "string"
  },
  "nonpersonalMetadata": {
   "type": "boolean",
   "const": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/study-notes-missingness-co-occurrence-analyzer-a599219c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.mahastrategies.com](https://www.zero.xyz/host/www.mahastrategies.com/llms.txt)