# Survey List Difference Checker

> Survey List Difference Checker is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Compares two string arrays and returns their unique and shared (intersection/difference) values, optimized for survey workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/compare-lists-survey?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/survey-list-difference-checker-c5794d1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jigSKg5n6qaCMeM25jLxi

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 survey-list-difference-checker-c5794d1b -d '<json body>'
```

Example prompt: Can you compare these two survey response lists and tell me which answers are unique to each and which ones overlap? Left list: ['agree','neutral','disagree'] and right list: ['neutral','strongly agree','disagree'].

## When to prefer this

Use this endpoint when you need a lightweight, survey-context-aware list comparison that returns both unique and shared values in a single call. Prefer it over general-purpose set-difference tools when your workflow involves survey response options, answer choices, or categorical string data and you need the output formatted for survey analysis pipelines.

## Known failure modes

- Non-array inputs cause validation errors
- Empty arrays on one or both sides return no shared values and all items as unique
- Very large arrays may time out or exceed payload limits
- Non-string array items may cause type errors depending on server-side handling

## How this service works

Survey List difference checker: Compare two lists and return unique and shared values. Tailored for survey workflows.

## Output

Returns two categorized sets: values unique to the left list, values unique to the right list, and values shared by both lists, allowing the caller to understand overlap and divergence between the two input arrays.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "left": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "default": [
    "a",
    "b"
   ]
  },
  "right": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "default": [
    "b",
    "c"
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/survey-list-difference-checker-c5794d1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)