# Scientific Dataset Records Schema Directionality Comparator

> Scientific Dataset Records Schema Directionality Comparator is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.035301/call, status unknown (last checked 2026-10-16).

Compares closed export-field directionality between supplied scientific dataset records and a reference schema, reporting field-level mismatches.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/intel/scientific-dataset-records/schema-directionality?utm_source=zero.xyz
- Price: $0.035301/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scientific-dataset-records-schema-directionality-comparator-202f2175
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2d0KjnOA7WoKazf27_wKE

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 scientific-dataset-records-schema-directionality-comparator-202f2175 -d '<json body>'
```

Example prompt: Compare the schema directionality of these two sets of scientific dataset records — the 'before' set has up to 32 entries and the 'after' set has up to 32 entries — using the 'public' data class, with nonpersonal metadata only, and allow extra fields in the output.

## When to prefer this

Use this endpoint when you need to programmatically compare schema field directionality between two versions of scientific dataset records (before/after), specifically for public or synthetic data classes with nonpersonal metadata constraints. Prefer this over general schema diff tools when you need closed export-field analysis in a structured, API-driven workflow without independent certification.

## Known failure modes

- 'before' array is empty or missing (minItems:1 required)
- 'after' or 'before' arrays exceed 32 items (maxItems:32)
- 'dataClass' not one of 'public' or 'synthetic'
- 'nonpersonalMetadata' not set to true (const:true required)
- Malformed JSON body returns 400-level error
- Service unavailable or payment not processed returns 402/5xx

## How this service works

Compare closed export-field Supplied-record analysis, not independent certification. Full contract at the free describe URL.

## Output

Returns a field-level directionality comparison between the supplied 'before' and 'after' scientific dataset record sets, identifying closed export fields that are mismatched, missing, or inconsistent with the expected schema — without performing independent certification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "array",
   "maxItems": 32,
   "minItems": 0
  },
  "before": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "dataClass": {
   "enum": [
    "public",
    "synthetic"
   ],
   "type": "string"
  },
  "nonpersonalMetadata": {
   "type": "boolean",
   "const": true
  },
  "consumerAllowsExtraFields": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scientific-dataset-records-schema-directionality-comparator-202f2175/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)