# Conclave x402 Listing Watch

> Conclave x402 Listing Watch is a paid API for AI agents from conclavex402p04.pythonanywhere.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-16).

Fetches a cached snapshot of one x402 listing from a fixed public directory to detect changes or verify its current state before paying.

## Facts

- Endpoint: GET https://conclavex402p04.pythonanywhere.com/v1/listing-watch/%7Bdirectory%7D/%7Bid%7D?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/conclave-x402-listing-watch-e7d491fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_papHc1a0wgYIDpu9bynMQ

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 conclave-x402-listing-watch-e7d491fc
```

Example prompt: Before we pay for that third-party x402 listing, pull the current snapshot for listing ID '0x2F2E1f54109B2525137EedA4A892600Ee956D42a' from the 'payai' directory so we can check whether it's changed since we last saw it.

## When to prefer this

Use this endpoint when you need to verify or monitor a specific x402 listing by directory and ID before committing to a payment — particularly when you want to detect whether listing metadata (payee, resources, accepted assets) has changed since a prior check. Prefer this over the x402 Integrity Check endpoint when you want a cached directory snapshot rather than a live catalog-vs-live comparison. Best suited for pre-payment due diligence workflows and automated change-detection pipelines operating on known x402 directories.

## Known failure modes

- Invalid or unknown directory/ID combination returns a 404 or error body
- Directory or listing not found in the fixed public catalog returns an error
- PythonAnywhere hosting may introduce occasional cold-start latency or downtime
- Missing required path parameters (directory or id) results in a routing error
- Payment failure (insufficient USDC balance) prevents the call from completing
- Stale cache may not reflect real-time changes if the snapshot TTL hasn't expired

## How this service works

Pay-per-call x402 data endpoints behind one public payTo: a normalized Solana token snapshot and a multi-rail status snapshot, plus deterministic /u/* micro-utilities.

## Output

Returns a JSON object containing the listing ID, payee address, array of resources with their tags, accepted payment assets (network, asset, amount), resource URL, description, and last-updated timestamp, plus a 'changed' boolean indicating whether the snapshot differs from a prior state, a 'fetched_at' timestamp, and a 'snapshot_token' for integrity reference.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "pathParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "0x2F2E1f54109B2525137EedA4A892600Ee956D42a",
  "fields": {
   "payee": "0x0000000000000000000000000000000000000000",
   "resources": [
    {
     "tags": [
      "x402"
     ],
     "type": "http",
     "accepts": [
      {
       "asset": "0xUSDC",
       "amount": "9000",
       "network": "eip155:8453"
      }
     ],
     "resource": "<captured-listing-resource-url>",
     "description": "...",
     "lastUpdated": "2026-01-01T00:00:00Z",
     "serviceName": "x402 Integrity Check"
    }
   ]
  },
  "changed": false,
  "directory": "payai",
  "fetched_at": "2026-01-01T00:00:00Z",
  "snapshot_token": "<43-char-urlsafe-base64>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/conclave-x402-listing-watch-e7d491fc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from conclavex402p04.pythonanywhere.com](https://www.zero.xyz/host/conclavex402p04.pythonanywhere.com/llms.txt)