# Ceramic Measurements - Schema Directionality

> Ceramic Measurements - Schema Directionality is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.035199/call, status unknown (last checked 2026-10-16).

Compares 'before' and 'after' arrays of ceramic measurement records to analyze schema directionality and field ordering changes in closed export fields.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/ceramic-measurements/schema-directionality?utm_source=zero.xyz
- Price: $0.035199/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ceramic-measurements-schema-directionality-ec071772
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AjkfMPnR4zPJz22b5tREw

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 ceramic-measurements-schema-directionality-ec071772 -d '<json body>'
```

Example prompt: Compare these two ceramic measurement record sets — the 'before' set has 5 entries and the 'after' set has 5 entries — and analyze the schema directionality of the closed export fields using public data class, flagging any nonpersonal metadata.

## When to prefer this

Use this endpoint when you need to compare two snapshots of ceramic measurement records specifically to assess schema field directionality changes in closed export fields — particularly when working with public or synthetic data classes and needing a fast, per-call analysis without independent certification overhead.

## Known failure modes

- 'before' array is empty or missing (minItems:1 violated) — request rejected
- 'after' array exceeds 32 items or 'before' exceeds 32 items — array size limit error
- dataClass not one of 'public' or 'synthetic' — enum validation error
- nonpersonalMetadata not exactly true (const:true) — validation failure
- Mismatched or malformed record structures in before/after arrays — analysis error

## How this service works

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

## Output

Returns an analysis of schema directionality differences between the supplied 'before' and 'after' ceramic measurement record arrays, indicating whether closed export fields have changed ordering or direction. This is a supplier-record comparison, not an 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/ceramic-measurements-schema-directionality-ec071772/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)