# Polymer Measurements - Revision Delta Map

> Polymer Measurements - Revision Delta Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.021319/call, status unknown (last checked 2026-10-16).

Compares two sets of polymer lot/method-pinned measurement records by stable record ID, enumerating owner, subject, revision, content, and scope pin changes between a before and after snapshot.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/polymer-measurements/revision-delta-map?utm_source=zero.xyz
- Price: $0.021319/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymer-measurements-revision-delta-map-960936e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CRhrgfh1yQSVlfR64jfOF

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 polymer-measurements-revision-delta-map-960936e4 -d '<json body>'
```

Example prompt: Compare these two sets of polymer measurement records — the before list has IDs [rec-001, rec-002, rec-003] and the after list has [rec-001, rec-002, rec-004] — and tell me what changed in terms of owner, subject, revision, content, and scope pins. Use public data class.

## When to prefer this

Choose this endpoint when you need to precisely diff two revision snapshots of polymer lot/method-pinned measurement records by stable ID and need a structured breakdown of owner, subject, revision, content, and scope pin changes. Prefer it over generic diff tools when working specifically with polymer measurement records under a lot/method pinning scheme, especially when you need field-level granularity on what changed per record.

## Known failure modes

- Before or after array exceeds 32 items — request rejected
- Invalid dataClass value (not 'public' or 'synthetic') — validation error
- nonpersonalMetadata not set to true — schema const violation
- Malformed or empty record IDs in arrays — partial or empty delta map
- Payment failure or insufficient USDC balance — x402 payment required error

## How this service works

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

## Output

Returns a delta map keyed by stable record ID, listing changed fields (owner, subject, revision pin, content pin, scope pin) between the before and after snapshots for each affected polymer lot/method-pinned measurement record.

## 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/polymer-measurements-revision-delta-map-960936e4/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)