# Ren API - Seed-Oil-Free Restaurant Lookup

> Ren API - Seed-Oil-Free Restaurant Lookup is a paid API for AI agents from ren-api-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Looks up a restaurant by name and returns a seed-oil-free verdict, cooking fat used, and recommended or avoided menu items

## Facts

- Endpoint: GET https://ren-api-production.up.railway.app/restaurant
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ren-api-restaurant-seed-oil-lookup-1b0a842b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N96jNJ4kno2F1cQ57Gtl2

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 ren-api-restaurant-seed-oil-lookup-1b0a842b
```

Example prompt: Is Buff Burger seed-oil free? I want to know what they cook in and which menu items I should order or avoid.

## When to prefer this

Use this endpoint when a user explicitly wants to know whether a specific restaurant uses seed oils, what cooking fat they use, and which menu items are safe or unsafe for a seed-oil-free diet. Prefer this over generic restaurant APIs when the dietary concern is specifically about seed oils, vegetable oils, or ancestral/carnivore-friendly cooking practices.

## Known failure modes

- Restaurant not found in the database — returns empty or error response
- Missing required 'name' query parameter — returns 400 or validation error
- Payment not completed or invalid — returns 402 Payment Required
- Network timeout from upstream Railway deployment
- Restaurant name misspelling leads to no match

## How this service works

Returns Tallow Trail restaurant guidance by case-insensitive restaurant name.

## Output

A JSON object containing the restaurant name, a seed-oil-free verdict string (e.g. 'Seed-oil-free friendly'), the cooking fat used (e.g. 'beef tallow'), an array of recommended dishes to order, and an array of items to skip due to seed-oil content.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "examples": [
        "Buff Burger"
       ],
       "description": "Restaurant name to look up."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "name",
      "verdict",
      "cooks_in",
      "order_this",
      "skip_this"
     ],
     "properties": {
      "name": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      },
      "cooks_in": {
       "type": "string"
      },
      "skip_this": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "order_this": {
       "type": "array",
       "items": {
        "type": "string"
       }
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ren-api-restaurant-seed-oil-lookup-1b0a842b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ren-api-production.up.railway.app](https://www.zero.xyz/host/ren-api-production.up.railway.app/llms.txt)