# Macaroon Network PINN Dataset Index

> Macaroon Network PINN 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 physics-informed neural network (PINN) datasets, papers, and models sourced from DataCite, arXiv, CORE, OpenAlex, and Hugging Face, returning only redistribution-allowed records.

## Facts

- Endpoint: POST https://api.macaroonnetwork.com/execute/polymathica-pinn-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-pinn-dataset-index-6c332e37
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BezG3YI_aO3e5iazILhC2

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-pinn-dataset-index-6c332e37 -d '<json body>'
```

Example prompt: Search the license-verified PINN dataset index for redistribution-allowed fluid dynamics training datasets — I need metadata pointers to open-license resources harvested from arXiv and Hugging Face.

## When to prefer this

Choose this endpoint when you need to discover PINN-specific scientific assets (datasets, papers, or models) and license compliance is a hard requirement — particularly when you need the falsifiable guarantee that records are redistribution-allowed at harvest time. Prefer this over generic scientific search APIs when your use case specifically involves physics-informed neural networks and you need metadata pointers only without downloading underlying assets.

## Known failure modes

- No matching redistribution-allowed records found for the query — returns empty result set
- Malformed POST body or missing required fields returns a schema validation error
- License verification may be stale if harvested asset's license changed after harvest time
- Rate limiting or payment failure at $0.002 USDC per call via x402 protocol
- Overly broad queries may return large unranked result sets requiring further filtering

## How this service works

A domain-curated, license-verified metadata pointer index over physics-informed neural network (PINN) datasets, papers, and models harvested from DataCite, arXiv, CORE, OpenAlex, and Hugging Face. 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, or model weights are downloaded or resold.

## Output

Returns metadata pointer records for PINN datasets, papers, and models that have been confirmed redistribution-allowed at harvest time. Each record includes asset provenance (DataCite, arXiv, CORE, OpenAlex, or Hugging Face), license verification status, and pointer information — no underlying data, weights, or paper content is included.

## 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-pinn-dataset-index-6c332e37/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)