# Macaroon Network – Scientific Paper Search

> Macaroon Network – Scientific Paper Search is a paid API for AI agents from api.macaroonnetwork.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Searches an indexed corpus of scientific papers by topic, returning source-linked metadata including authors, dates, licence evidence, and corpus provenance.

## Facts

- Endpoint: POST https://api.macaroonnetwork.com/execute/polymathica-research-paper-search-v1
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/macaroon-network-scientific-paper-search-bfc33c9c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fvC220UbR4RIMoJehR84t

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-scientific-paper-search-bfc33c9c -d '<json body>'
```

Example prompt: Search the Macaroon Network scientific paper corpus for research on CRISPR gene editing and return metadata including authors, publication dates, source links, and any licence information available.

## When to prefer this

Choose this endpoint when you need source-linked bibliographic metadata for scientific papers by topic, especially when licence evidence and corpus provenance are important. Prefer it over general web search when you need structured academic metadata with traceable origins. Use the sibling Crossref DOI search endpoint if you need stable DOI resolution for a specific known paper, or the corpus URL check endpoint to verify a specific paper URL against the indexed corpus.

## Known failure modes

- No papers found for the given topic query — returns empty results
- Overly broad query returns too many low-relevance results
- Licence evidence absent if source did not supply it
- Corpus may not include very recent or paywalled publications
- Malformed or missing body payload returns validation error

## How this service works

Find source-linked scientific papers by topic. Returns metadata pointers, authors, dates, licence evidence when supplied by the source, and corpus provenance; it does not sell paper text or infer reuse rights.

## Output

Returns a list of scientific paper records with metadata pointers including titles, author names, publication dates, source links, licence evidence (when supplied by the source), and corpus provenance information. Does not return full paper text or make inferences about reuse rights.

## 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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "payload": {
   "query": "",
   "total": 0,
   "records": [],
   "provenance": {
    "content_hash": null,
    "metadata_only": null,
    "no_outbound_network_on_purchase": null
   }
  },
  "settled": true,
  "predicate_passed": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/macaroon-network-scientific-paper-search-bfc33c9c/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)