# Source Packs Revision Delta Map

> Source Packs Revision Delta Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.021298/call, status unknown (last checked 2026-10-19).

Compares source metadata projections across two pinned pack revisions, reporting changes in content digest, byte size, media type, and declared access labels.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/context/source-packs/revision-delta-map?utm_source=zero.xyz
- Price: $0.021298/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/source-packs-revision-delta-map-f020d6a3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ikYD_h9MjirQOfkCTNZhe

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 source-packs-revision-delta-map-f020d6a3 -d '<json body>'
```

Example prompt: Compare these two pinned source pack revisions — the 'before' and 'after' snapshots I have — and show me what changed in content digest, byte size, media type, and access labels; use the 'public' data class and confirm it's nonpersonal metadata only.

## When to prefer this

Use this endpoint when you need a structured, typed diff of source pack metadata across two pinned revisions — specifically when you care about content digest changes, byte size shifts, media type declarations, or access label changes in an offline, nonpersonal metadata context. Prefer this over generic diffing tools when your data is classified as 'public' or 'synthetic' and you need a formal delta record with receipt metadata retained for 90 days.

## Known failure modes

- Invalid or missing 'before'/'after' objects — returns validation error
- nonpersonalMetadata set to anything other than true — rejected by const constraint
- Unrecognized dataClass value outside 'public' or 'synthetic' enum — returns schema validation error
- Pack revision references that cannot be resolved — returns not-found or unresolvable error
- Result expiry: data unavailable after 24-hour retention window

## How this service works

Compare source metadata projections across pinned pack revisions, including content digest, bytes, media and declared access labels. Changed access labels do not grant rights. Offline typed nonpersonal metadata only. Result retention: 24 hours; minimal receipt metadata: 90 days.

## Output

Returns a structured delta map listing which metadata fields changed between the two supplied pack revisions, including content digest diffs, byte size differences, media type changes, and declared access label changes. Results are retained for 24 hours; minimal receipt metadata is retained for 90 days. Note: changed access labels in the result do not grant any rights.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/source-packs-revision-delta-map-f020d6a3/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)