# ScopeAPI Compare

> ScopeAPI Compare is a paid API for AI agents from scopeapi.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns an evidence-backed, side-by-side comparison of two companies, products, technologies, or topics across user-defined criteria with cited sources.

## Facts

- Endpoint: POST https://scopeapi.dev/compare
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scopeapi-compare-9f47f95f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__hwlIyjJbc0HEHf9b5CPp

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 scopeapi-compare-9f47f95f -d '<json body>'
```

Example prompt: Can you compare Notion and Confluence side by side — I want to see how they stack up on pricing, collaboration features, and integrations, with sources to back it up?

## When to prefer this

Choose this endpoint when you need a structured, evidence-backed head-to-head comparison between exactly two entities — companies, products, technologies, or services — especially when you want cited sources and custom evaluation criteria. Prefer it over general web search when you need a normalized, side-by-side output rather than raw search results, and over manual research when you need fast structured output for decision-making or reports.

## Known failure modes

- Missing required 'left' or 'right' fields returns a validation error
- Highly obscure or niche subjects may return sparse or low-confidence comparisons
- Custom criteria that are too vague may produce generic rather than targeted analysis
- Network or upstream research failures may return partial results or empty comparison arrays
- Payment not accepted results in 402 response before research is performed

## How this service works

Compare two companies, products, services, technologies, tools, topics, or other options side by side using current research. Returns an evidence-backed comparison with explicit criteria, differences, tradeoffs, advantages, disadvantages, citations, and sources.

## Output

A structured JSON response with a status field, a comparison array containing side-by-side evaluations across each criterion (with per-criterion scores or assessments for each subject), and a sources array of cited URLs or references used to back the research.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "left",
      "right"
     ],
     "properties": {
      "left": {
       "type": "string",
       "description": "First company, product, competitor, website, technology, service, or topic to compare"
      },
      "right": {
       "type": "string",
       "description": "Second company, product, competitor, website, technology, service, or topic to compare"
      },
      "criteria": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Optional comparison criteria such as pricing, features, market position, risks, or performance"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok",
  "sources": [],
  "comparison": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scopeapi-compare-9f47f95f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scopeapi.dev](https://www.zero.xyz/host/scopeapi.dev/llms.txt)