# x402station.io What's New — Catalog Diff Polling

> x402station.io What's New — Catalog Diff Polling is a paid API for AI agents from x402station.io, paid per call via x402, $0.001000/call, status down (last checked 2026-09-15).

Returns a diff of newly added and removed x402 endpoints since a given timestamp, enabling agents to stay current with the x402 catalog

## Facts

- Endpoint: POST https://x402station.io/api/v1/whats-new
- Price: $0.001000/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402station-io-2e467eff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__LqvrCde3ZXUlt6LFeXUm

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 x402station-io-2e467eff -d '<json body>'
```

Example prompt: Can you check what new x402 payment endpoints have been added or removed since yesterday — show me up to 50 results so I can update my routing table?

## When to prefer this

Use this endpoint when an agent needs to incrementally sync with the x402 endpoint catalog rather than fetching the entire catalog — ideal for periodic polling workflows, change-detection pipelines, or keeping a local routing table up to date without redundant full scans.

## Known failure modes

- Invalid or future 'since' timestamp returns 400 or empty diff
- Limit exceeding maximum returns clamped or error response
- Network timeout if catalog is large and diff computation is slow
- Payment failure (USDC balance insufficient) returns 402 before processing
- Malformed request body returns 400 validation error

## How this service works

Independent risk-signal layer for x402 agentic commerce — endpoint evidence (decoy / zombie / price-trap / never-paid) before an agent authorizes payment.

## Output

An object containing added_endpoints[] and removed_endpoints[] arrays listing x402 endpoint URLs that changed since the requested timestamp, plus counts summarizing additions and removals, and CDP quality signals including settlement count and recency for newly discovered endpoints.

## 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": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 500,
       "minimum": 1
      },
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "ISO 8601 timestamp; default now() - 24h. Cannot be older than 30 days or in the future."
      }
     }
    },
    "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": {
  "limit": 200,
  "since": "2026-04-27T00:00:00Z",
  "until": "2026-04-28T00:00:00Z",
  "summary": {
   "polls_in_window": 288,
   "added_services_count": 3,
   "added_endpoints_count": 14,
   "removed_services_count": 0,
   "current_active_services": 549,
   "removed_endpoints_count": 2,
   "current_active_endpoints": 25950
  },
  "truncated": false,
  "window_hours": 24,
  "added_endpoints": [
   {
    "url": "https://api.example.com/v1/inference",
    "currency": "USDC",
    "provider": "example.com",
    "price_usdc": "0.001",
    "service_id": "example-service",
    "service_name": "Example",
    "first_seen_at": "2026-04-27T08:42:11Z"
   }
  ],
  "removed_endpoints": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402station-io-2e467eff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402station.io](https://www.zero.xyz/host/x402station.io/llms.txt)