# Ren API - Seed-Oil-Free Dish Swaps

> Ren API - Seed-Oil-Free Dish Swaps 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).

Returns seed-oil-free alternative cooking methods or preparations for common dishes like fries, fried chicken, salad dressing, and wings.

## Facts

- Endpoint: GET https://ren-api-production.up.railway.app/swaps
- 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-seed-oil-free-dish-swaps-4ef5c9c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8BOkbWTubdfoix7iHggfd

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-seed-oil-free-dish-swaps-4ef5c9c8
```

Example prompt: What are some seed-oil-free swaps for fries — like tallow or duck fat options instead of the usual vegetable oil?

## When to prefer this

Use this endpoint when a user wants to identify seed-oil-free cooking alternatives for specific common dishes. Ideal for health-conscious meal planning, clean eating workflows, or restaurant recommendation agents that need to filter or suggest dishes avoiding industrial seed oils. Best suited for the four supported dish types: fries, fried chicken, salad dressing, and wings.

## Known failure modes

- Dish not in enum (fries, fried chicken, salad dressing, wings) — likely a 400 or validation error
- Missing required 'dish' query parameter — validation error
- Payment not provided or insufficient USDC on Base mainnet — 402 Payment Required
- Service unavailable on Railway deployment — 503 or timeout

## How this service works

Returns seed-oil-free alternatives for common dishes.

## Output

A JSON object containing the queried dish name and an array of seed-oil-free alternative preparations (e.g. 'Beef tallow fries', 'Duck fat fries') that avoid industrial seed oils.

## 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": [
      "dish"
     ],
     "properties": {
      "dish": {
       "enum": [
        "fries",
        "fried chicken",
        "salad dressing",
        "wings"
       ],
       "type": "string",
       "description": "Dish to find seed-oil-free swaps for."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "dish",
      "alternatives"
     ],
     "properties": {
      "dish": {
       "type": "string"
      },
      "alternatives": {
       "type": "array",
       "items": {
        "type": "string"
       }
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ren-api-seed-oil-free-dish-swaps-4ef5c9c8/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)