# Research List Difference Checker

> Research 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 (difference) and shared (intersection) values, optimized for research workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/compare-lists-research?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/research-list-difference-checker-03e45c47
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CtnXK50S9k9NL-kNCro3J

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 research-list-difference-checker-03e45c47 -d '<json body>'
```

Example prompt: Compare these two research lists and tell me which values are unique to each and which ones they share — left list is ['alpha','beta','gamma'] and right list is ['beta','delta','gamma'].

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.01) set-difference and intersection operation on two string lists within a research or data-science workflow — especially when you want a purpose-built tool rather than implementing set logic yourself. Prefer this over general-purpose code execution when you want a stateless, reliable microservice with a clean JSON interface.

## Known failure modes

- Missing or malformed 'left' or 'right' array fields return a 400 error
- Non-string array items may be rejected or coerced unexpectedly
- Empty arrays on one or both sides return empty difference or intersection sets
- Payment failure or insufficient USDC balance returns a 402 error
- Large arrays may exceed payload limits

## How this service works

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

## Output

Returns the unique values exclusive to the left list, unique values exclusive to the right list, and the shared values present in both lists, enabling clear set-difference and intersection analysis.

## 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/research-list-difference-checker-03e45c47/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)