# Spectrometry Records - Revision Delta Map

> Spectrometry Records - Revision Delta Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.021317/call, status unknown (last checked 2026-10-16).

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

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/spectrometry-records/revision-delta-map?utm_source=zero.xyz
- Price: $0.021317/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spectrometry-records-revision-delta-map-738da909
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3tcY68-hkwO-2-dCz9Ian

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 spectrometry-records-revision-delta-map-738da909 -d '<json body>'
```

Example prompt: Compare these two sets of spectrometry records for me — here are the before arrays and after arrays of record IDs — and enumerate every owner, subject, revision, content, and scope pin change between them using public data class.

## When to prefer this

Choose this endpoint when you need a precise, field-level diff of spectrometry records across two revisions, specifically where owner/subject/revision/content/scope pin changes need to be enumerated by stable record ID. It is purpose-built for instrument/calibration/method-pinned spectrum record comparison rather than general-purpose diff tools or independent certification services.

## Known failure modes

- Array exceeds maxItems of 32 — request rejected
- dataClass not one of 'public' or 'synthetic' — validation error
- nonpersonalMetadata not set to true (const) — schema violation
- Empty or malformed record ID arrays — no delta computed
- Network timeout or payment failure — 402 or 5xx response

## How this service works

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

## Output

A structured delta map enumerating all detected changes between the before and after record sets, categorized by owner, subject, revision, content, and scope pin changes, keyed by stable record ID.

## 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/spectrometry-records-revision-delta-map-738da909/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)