# Blockchain Money Map – Agent Rendered Checkout UI Diff

> Blockchain Money Map – Agent Rendered Checkout UI Diff is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Compares two checkout UI snapshots (facts vs reference_facts) to detect discrepancies between what a seller charges and what is rendered to a buyer, flagging hidden fees or line-item mismatches.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-agent-rendered-checkout-ui-diff
- 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/blockchain-money-map-agent-rendered-checkout-ui-diff-71d5974d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sGxzG6ohgoz83nqku93JR

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 blockchain-money-map-agent-rendered-checkout-ui-diff-71d5974d -d '<json body>'
```

Example prompt: Compare these two checkout snapshots for the USDC payment flow and tell me if the seller total of $45.00 matches what's rendered to the buyer — flag any hidden fees or line-item differences between the two snapshots.

## When to prefer this

Choose this endpoint when an AI agent needs to programmatically verify checkout UI integrity in an x402 payment flow — specifically to detect hidden fees, price inflation, or line-item mismatches between what a seller declares and what a buyer sees. Prefer this over manual inspection when automating consumer-protection checks in blockchain checkout pipelines or when regression-testing checkout UI changes.

## Known failure modes

- Missing required facts fields (seller_total_amount, rendered_total_amount, seller_line_items, rendered_line_items, currency) returns validation error
- mode must be set to 'compare' — any other value rejected
- Mismatched currency between facts and reference_facts may produce misleading diff
- Line item arrays exceeding 50 items are truncated
- Payment not received via x402 returns 402 Payment Required

## How this service works

Choose Blockchain Money Map for human-readable public blockchain reports or x402-paid agent API services.

## Output

A JSON diff report indicating whether the seller-declared checkout facts match the rendered buyer-facing checkout, including discrepancies in total amounts, individual line items, fulfillment methods, currency, and whether hidden fees are present. Returns structured comparison results highlighting any mismatches between the two snapshots.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "compare"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "seller_total_amount",
    "rendered_total_amount",
    "seller_line_items",
    "rendered_line_items",
    "currency"
   ],
   "properties": {
    "currency": {
     "type": "string",
     "maxLength": 500
    },
    "snapshot_label": {
     "type": "string",
     "maxLength": 500
    },
    "seller_line_items": {
     "type": "array",
     "maxItems": 50
    },
    "buyer_view_summary": {
     "type": "string",
     "maxLength": 500
    },
    "hidden_fee_present": {
     "type": "boolean"
    },
    "rendered_line_items": {
     "type": "array",
     "maxItems": 50
    },
    "seller_total_amount": {
     "type": "number"
    },
    "rendered_total_amount": {
     "type": "number"
    },
    "seller_fulfillment_methods": {
     "type": "array",
     "maxItems": 50
    },
    "rendered_fulfillment_methods": {
     "type": "array",
     "maxItems": 50
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "seller_total_amount",
    "rendered_total_amount",
    "seller_line_items",
    "rendered_line_items",
    "currency"
   ],
   "properties": {
    "currency": {
     "type": "string",
     "maxLength": 500
    },
    "snapshot_label": {
     "type": "string",
     "maxLength": 500
    },
    "seller_line_items": {
     "type": "array",
     "maxItems": 50
    },
    "buyer_view_summary": {
     "type": "string",
     "maxLength": 500
    },
    "hidden_fee_present": {
     "type": "boolean"
    },
    "rendered_line_items": {
     "type": "array",
     "maxItems": 50
    },
    "seller_total_amount": {
     "type": "number"
    },
    "rendered_total_amount": {
     "type": "number"
    },
    "seller_fulfillment_methods": {
     "type": "array",
     "maxItems": 50
    },
    "rendered_fulfillment_methods": {
     "type": "array",
     "maxItems": 50
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-money-map-agent-rendered-checkout-ui-diff-71d5974d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)