# Ephemeris Snapshots - Source Coverage Map

> Ephemeris Snapshots - Source Coverage Map is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.035243/call, status unknown (last checked 2026-10-20).

Binds ephemeris record references to an exact owner/subject/revision/content/source frame to produce a source coverage map, without independently verifying the underlying source bytes.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/celestial/ephemeris-snapshots/source-coverage-map?utm_source=zero.xyz
- Price: $0.035243/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-source-coverage-map-af5464b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xJs0TC8QE2u-V8F679kve

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-source-coverage-map-af5464b6 -d '<json body>'
```

Example prompt: Can you generate a source coverage map for these 10 ephemeris snapshot rows against 5 declared sources, treating the data as public and marking it as non-personal metadata only?

## When to prefer this

Use this endpoint when you need to analyze source coverage and attribution for a batch of ephemeris records against a set of declared sources, especially when the goal is frame-binding validation (owner/subject/revision/content/source) rather than independent verification of raw ephemeris bytes. Prefer this over general data validation tools when working with celestial or scientific dataset provenance within the mahastrategies platform.

## Known failure modes

- rows array exceeds 32-item maximum — request rejected
- sources array exceeds 32-item maximum — request rejected
- dataClass not one of 'public' or 'synthetic' — validation error
- nonpersonalMetadata not set to boolean true — schema violation
- empty rows or sources arrays — minItems constraint violation
- payment insufficient or x402 protocol failure — authorization error

## How this service works

Bind record references to an exact owner/subject/revision/content/source frame; hash-shaped strings are declarations, not independently verified source bytes for target/centre/frame/time-scale/correction/kernel-pinned ephemeris Supplied-record analysis, not independent certification. Full contract at the free describe URL.

## Output

Returns a source coverage map that binds each supplied ephemeris record row to its declared owner, subject, revision, content, and source frame. The output identifies which records are covered by which sources, flagging hash-shaped strings as declarations rather than independently verified source bytes. This is a supplied-record analysis, not independent certification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "sources": {
   "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-source-coverage-map-af5464b6/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)