# BriefSnap AI Document Comparator

> BriefSnap AI Document Comparator is a paid API for AI agents from briefsnap-x402.fly.dev, paid per call via x402, $3/call, status unknown (last checked 2026-09-14).

Compares two documents or texts using AI, highlighting differences, similarities, and key insights between them

## Facts

- Endpoint: POST https://briefsnap-x402.fly.dev/api/compare-docs
- Price: $3/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/briefsnap-ai-document-comparator-c2091b82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g8eeJcKVFgMAvsXW_7bLY

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 briefsnap-ai-document-comparator-c2091b82 -d '<json body>'
```

Example prompt: Can you compare these two contract drafts for me and highlight the key differences, any new clauses, and flag anything I should pay attention to before signing?

## When to prefer this

Choose this endpoint when you need a direct AI-powered side-by-side comparison of two documents or text bodies, especially when you want differences, similarities, and action items surfaced automatically. Prefer it over generic summarization endpoints when the user specifically wants to understand how two versions or two distinct texts relate to each other. Best suited for contract review, policy change tracking, research comparison, and document diffing workflows where the $3 USDC per-call cost is acceptable for high-quality AI analysis.

## Known failure modes

- Missing or empty document body — returns validation error
- Documents too large or malformed — may result in timeout or truncation
- Payment of $3 USDC not fulfilled — returns 402 Payment Required
- Unsupported body encoding type — returns schema validation error
- Network timeout on the fly.dev host — returns 503 or connection error

## How this service works

Pay USDC, get instant AI summaries, action item extraction, and simplified explanations of any document or text.

## Output

Returns an AI-generated comparison of the two submitted documents, including a summary of differences and similarities, notable changes, action items or points requiring attention, and a simplified explanation of how the documents relate to each other.

## 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": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/briefsnap-ai-document-comparator-c2091b82/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from briefsnap-x402.fly.dev](https://www.zero.xyz/host/briefsnap-x402.fly.dev/llms.txt)