# AgentDiet Preprint Digest Endpoint

> AgentDiet Preprint Digest Endpoint is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Returns a compressed, high-ROI digest of preprint research content via a query, with ~91% compression ratio proof.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/v1/preprint-digest?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentdiet-preprint-digest-endpoint-ec031bb1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_42LRutLguULAwngOzMZV_

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 agentdiet-preprint-digest-endpoint-ec031bb1
```

Example prompt: Can you pull a preprint digest on CRISPR gene editing from the AgentDiet gateway and show me the compression ratio it achieved?

## When to prefer this

Choose this endpoint when you need a highly compressed, agent-ready digest of preprint research content and want quantifiable proof of information density (compression ratio). It is particularly suited for AI agents that need to process large volumes of academic preprint literature efficiently within token budgets, and when paying per-call in USDC via x402 is acceptable. Prefer alternatives if you need full-text retrieval, citation graphs, or peer-reviewed journal content rather than preprints.

## Known failure modes

- Missing or empty 'query' param returns incomplete or generic digest
- Payment not settled in USDC on Base results in 402 payment required error
- Invalid 'type' field (must be 'http') causes schema validation failure
- Upstream preprint source unavailable leads to empty 'data' field with error status
- Malformed input object missing required 'method' field causes request rejection

## How this service works

Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.

## Output

A JSON object containing a 'data' field with the digest content, a 'status' field ('ok' on success), and an 'roi_proof' object that includes a 'compression_ratio_pct' value (e.g. 91.4%) indicating how much the source material was compressed.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "query": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "status": "ok",
  "roi_proof": {
   "compression_ratio_pct": 91.4
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentdiet-preprint-digest-endpoint-ec031bb1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-gateway.agentdiet.dev](https://www.zero.xyz/host/mcp-gateway.agentdiet.dev/llms.txt)