# Ephemeris Snapshots - Export Semantic Parity

> Ephemeris Snapshots - Export Semantic Parity is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.039329/call, status unknown (last checked 2026-10-20).

Compares two sets of fixed-epoch celestial position export declarations by exact integer-metre scaling, verifying coordinate frame consistency without performing live ephemeris queries or predictions.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/celestial/ephemeris-snapshots/export-semantic-parity?utm_source=zero.xyz
- Price: $0.039329/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ephemeris-snapshots-export-semantic-parity-8e2962bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H_-3DGjvLVzM0PWGM6fdK

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 ephemeris-snapshots-export-semantic-parity-8e2962bf -d '<json body>'
```

Example prompt: Compare these two sets of celestial position export snapshots — up to 8 entries before and 8 after — using public data class, and check whether the integer-metre scaling and coordinate frames are consistent between them.

## When to prefer this

Use this endpoint when you need to verify that two fixed-epoch celestial position export snapshots are semantically equivalent in terms of integer-metre scaling and coordinate frame declarations, without needing live ephemeris data, frame rotation, or celestial prediction. Prefer it over live ephemeris query endpoints when your data is already exported and you only need offline structural and scaling consistency validation.

## Known failure modes

- Mismatched array lengths between before and after inputs may produce indeterminate comparison results
- Arrays exceeding 32 items will be rejected by schema validation
- Non-integer metre values in position data may cause parity check failures
- Invalid or unsupported coordinate frame declarations will trigger validation errors
- nonpersonalMetadata must be exactly true or the request will be rejected
- Missing required dataClass enum value ('public' or 'synthetic') causes request rejection

## How this service works

Compare supplied fixed-epoch position exports by exact integer metre scaling, preserving declared coordinate frames. No ephemeris query, frame rotation or celestial prediction. Offline typed metadata only. Retained-result recovery: 24 hours; minimal receipt metadata: 90 days.

## Output

Returns a structured parity report indicating whether the before and after ephemeris snapshot arrays match on integer-metre scaling and declared coordinate frames, without performing live ephemeris queries or frame rotations. Results are retained for 24 hours; receipt metadata is retained for 90 days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "before": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "dataClass": {
   "enum": [
    "public",
    "synthetic"
   ],
   "type": "string"
  },
  "nonpersonalMetadata": {
   "type": "boolean",
   "const": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ephemeris-snapshots-export-semantic-parity-8e2962bf/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)