# Reaction Records - Revision Delta Map

> Reaction Records - Revision Delta Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.021316/call, status unknown (last checked 2026-10-20).

Computes a field-level delta between two revisions of a reaction record, enumerating changes to owner, subject, revision, content, and scope pins for dataset/reaction/method records.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/compute/reaction-records/revision-delta-map?utm_source=zero.xyz
- Price: $0.021316/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/reaction-records-revision-delta-map-0eeee264
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dSWKtlymuwmP-rFHroaiu

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 reaction-records-revision-delta-map-0eeee264 -d '<json body>'
```

Example prompt: Show me the field-level delta between these two sets of reaction record revisions — I want to know what changed in owner, subject, content, and scope pins between the before and after arrays, treating the data as public nonpersonal metadata.

## When to prefer this

Use this endpoint when you need a precise, field-level diff of reaction record revisions — specifically when you need to enumerate changes to owner, subject, revision, content, and scope pins between two supplied snapshots of a dataset/reaction/method record. Prefer it over generic diff tools when the record structure follows the mahastrategies.com pin-based schema, and when you are working with public or synthetic nonpersonal metadata. Do not use it for independent provenance certification or for records with personally identifiable information.

## Known failure modes

- Arrays exceed 32 items — request rejected by maxItems constraint
- dataClass not set to 'public' or 'synthetic' — enum validation error
- nonpersonalMetadata not set to true — const constraint fails
- Malformed or empty arrays produce an empty or trivial delta
- Payment not supplied or insufficient USDC — 402 response blocking execution
- Upstream service unavailable — timeout or 5xx error

## How this service works

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

## Output

A structured delta map enumerating field-level changes between the two supplied revision arrays for a reaction record, covering owner, subject, revision, content, and scope pin mutations. Does not independently certify provenance — it reports caller-supplied record differences only.

## 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/reaction-records-revision-delta-map-0eeee264/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)