# AgentDiet Paper Summary API

> AgentDiet Paper Summary API 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 summary of an academic or research paper given a query, settling payment in USDC on Base via x402.

## Facts

- Endpoint: GET https://mcp-gateway.agentdiet.dev/v1/paper-summary?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-paper-summary-api-593ea18e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xui6Q-Vl6IcFnftnj9c0a

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-paper-summary-api-593ea18e
```

Example prompt: Can you pull me a compressed summary of recent research on transformer attention mechanisms — I just need the key findings, not the full paper.

## When to prefer this

Choose this endpoint when an AI agent needs a fast, cost-effective ($0.01 USDC) distilled summary of academic or research papers without fetching and parsing full PDFs. It is ideal for agentic workflows that need to bootstrap domain knowledge, filter relevant literature, or produce executive-ready briefings. Prefer this over generic web search when you specifically need structured, compressed research output with a provable compression ratio.

## Known failure modes

- Missing or empty 'query' param returns empty or irrelevant summary
- Payment failure via x402/USDC on Base prevents access (402 response)
- No matching papers found for the query returns empty data object
- Malformed input schema (missing required 'type' or 'method' fields) returns error
- Rate limiting or gateway unavailability returns non-200 status

## 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

Returns a JSON object with a 'data' field containing the paper summary, a 'status' field ('ok' on success), and an 'roi_proof' object showing the compression_ratio_pct (e.g. 91.4%), indicating how much the content was distilled relative to the source.

## 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-paper-summary-api-593ea18e/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)