# x402 Price Drift Scanner

> x402 Price Drift Scanner is a paid API for AI agents from bj7e26lfpo4fthvr35hczdipby.srv.us, paid per call via x402, $0.03/call, status down (last checked 2026-09-15).

Detects and reports discrepancies between x402 catalog-listed prices and live endpoint prices, flagging underquoted and overquoted resources.

## Facts

- Endpoint: GET https://bj7e26lfpo4fthvr35hczdipby.srv.us/v1/x402-drift
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-price-drift-scanner-7ecbf378
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FYqgnDtrSxMAk9PGncotP

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 x402-price-drift-scanner-7ecbf378
```

Example prompt: Show me up to 100 x402 endpoints where the live price differs from the catalog listing, filtered to only those where the catalog is underquoting — so I know which ones would get my payments rejected.

## When to prefer this

Use this endpoint when an agent needs to verify that x402 payment amounts derived from catalog listings are still accurate before executing payments, or when auditing the x402 catalog for stale pricing data. It is the only purpose-built tool for cross-referencing live x402 endpoint prices against catalog-listed prices and quantifying the gap.

## Known failure modes

- Invalid direction enum value returns 400 error
- Limit out of range (below 1 or above 200) returns validation error
- Upstream catalog or liveness check unavailable causes 503 or empty results
- No drifted endpoints found returns empty results array with zero counts

## How this service works

Seven account-free paid tools for source integrity, x402 catalog search, preflight, liveness, routing, price drift, and batch verification.

## Output

A JSON object containing a list of drifted resources, each with the resource URL, drift direction (underquoted_by_catalog or overquoted_by_catalog), drift percentage, live price in USDC, catalog price in USDC, and a human-readable consequence string. Also includes summary counts: total_drifted, overquoted_by_catalog, underquoted_by_catalog, and a driftVersion identifier.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "string",
       "description": "Max rows, 1-200, default 50"
      },
      "direction": {
       "enum": [
        "underquoted_by_catalog",
        "overquoted_by_catalog"
       ],
       "type": "string",
       "description": "Filter by drift direction"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "resource": "https://api.justaname.id/ens/v2/resolve",
    "direction": "underquoted_by_catalog",
    "drift_pct": 400,
    "consequence": "a payment sized from the catalog listing will be rejected as insufficient",
    "live_price_usdc": 0.005,
    "catalog_price_usdc": 0.001
   }
  ],
  "driftVersion": "1.0",
  "total_drifted": 9,
  "overquoted_by_catalog": 4,
  "underquoted_by_catalog": 5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-price-drift-scanner-7ecbf378/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bj7e26lfpo4fthvr35hczdipby.srv.us](https://www.zero.xyz/host/bj7e26lfpo4fthvr35hczdipby.srv.us/llms.txt)