# Ceramic Measurements - Revision Delta Map

> Ceramic Measurements - Revision Delta Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.021321/call, status unknown (last checked 2026-10-20).

Enumerates owner, subject, revision, content, and scope pin changes between two supplied revisions of ceramic lot/method-pinned measurement records by stable record ID.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/ceramic-measurements/revision-delta-map?utm_source=zero.xyz
- Price: $0.021321/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ceramic-measurements-revision-delta-map-cde5d245
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ATZTcADUzfemKLacX01zN

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-revision-delta-map-cde5d245 -d '<json body>'
```

Example prompt: Compare my two sets of ceramic measurement records — the before array has up to 32 entries and the after array has up to 32 entries, both using public data class — and give me a full delta map showing every owner, subject, revision, content, and scope pin change by stable record ID.

## When to prefer this

Use this endpoint when you need a granular, pin-level diff of ceramic measurement records across two specific revisions, particularly when tracking changes to owner, subject, revision, content, or scope metadata by stable record ID. Prefer this over general record comparison tools when your records are ceramic lot or method-pinned and you need a structured delta map rather than a summary count of changes.

## Known failure modes

- before or after arrays exceed 32 items — request rejected
- dataClass not one of 'public' or 'synthetic' — validation error
- nonpersonalMetadata not set to true — schema constraint violation
- empty or malformed record entries in arrays — partial or failed delta computation
- network or payment failure via x402 protocol — no result returned

## How this service works

Enumerate owner, subject, revision, content and scope pin changes by stable record ID in two supplied revisions for ceramic lot/method-pinned measurement Supplied-record analysis, not independent certification. Full contract at the free describe URL.

## Output

Returns a structured delta map keyed by stable record ID, listing all detected pin changes (owner, subject, revision, content, scope) between the before and after revision arrays. This is a supplied-record analysis, not independent certification.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ceramic-measurements-revision-delta-map-cde5d245/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)