# Macaroon Network Polymathica SciML Dataset Index

> Macaroon Network Polymathica SciML Dataset Index is a paid API for AI agents from api.macaroonnetwork.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Searches a license-verified metadata pointer index of scientific machine learning (SciML) datasets, papers, models, and code harvested from arXiv, CORE, DataCite, OpenAlex, Zenodo, Hugging Face, and GitHub — returning only records confirmed as redistribution-allowed.

## Facts

- Endpoint: POST https://api.macaroonnetwork.com/execute/polymathica-sciml-dataset-index-v1
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/macaroon-network-polymathica-sciml-dataset-index-1ca2c05e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HZBJiNHZJIl8SsrrGBoAz

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 macaroon-network-polymathica-sciml-dataset-index-1ca2c05e -d '<json body>'
```

Example prompt: Search the Polymathica SciML index for redistribution-allowed datasets related to fluid dynamics simulations — I need metadata pointers to anything harvested from Zenodo or Hugging Face that's been license-verified.

## When to prefer this

Choose this endpoint when you need to discover scientific machine learning datasets, papers, models, or code that are explicitly verified as redistribution-allowed — and when license compliance is a hard requirement, not a nice-to-have. It is preferable over raw search engines (Google Scholar, Semantic Scholar) or unverified dataset hubs because every record carries a redistribution_allowed confirmation at harvest time. It covers a multi-source corpus (arXiv, CORE, DataCite, OpenAlex, Zenodo, Hugging Face, GitHub) deduplicated into a single index, making it more efficient than querying each source individually. Use it when you need metadata pointers rather than the underlying assets themselves.

## Known failure modes

- Query returns no results if no redistribution-allowed records match the search criteria
- Payment failure or insufficient USDC balance blocks the call (x402 payment required at $0.002 per call)
- Malformed POST body or missing required fields (type, method, bodyType, body) returns a 400 error
- License status may be stale if redistribution_allowed was confirmed at harvest time but has since changed upstream
- Index may not contain assets from sources not yet harvested in the Polymathica pipeline

## How this service works

A domain-curated, license-verified metadata pointer index over general scientific machine learning (SciML) datasets, papers, models, and code harvested from arXiv, CORE, DataCite, OpenAlex, Zenodo, Hugging Face, and GitHub. Every record returned has been confirmed redistribution_allowed at harvest time -- this is the falsifiable guarantee the listing sells, not raw data volume. Metadata pointers only -- no underlying datasets, papers, models, or code is downloaded or resold.

## Output

Returns metadata pointer records for SciML assets (datasets, papers, models, code) that have been confirmed as redistribution-allowed at harvest time. Each record includes metadata pointers, content hashes, asset IDs, readiness state, source provenance (arXiv, CORE, DataCite, OpenAlex, Zenodo, Hugging Face, GitHub), and license verification status. No underlying data, papers, models, or code is returned — only metadata pointers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/macaroon-network-polymathica-sciml-dataset-index-1ca2c05e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.macaroonnetwork.com](https://www.zero.xyz/host/api.macaroonnetwork.com/llms.txt)