# latency-probe-bulk

> latency-probe-bulk is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Concurrently checks HTTP latency for up to 20 URLs in a single call, returning per-item latency results in input order with error fields and a failure count.

## Facts

- Endpoint: GET https://intel.rallylive.ca/bulk/monitor/latency
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/latency-probe-bulk-03667ae4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P8uLwuPVvl9ZNHp5T4UMS

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 latency-probe-bulk-03667ae4
```

Example prompt: Can you check the latency of all 15 URLs in my list at once and tell me which ones are slow or returning errors?

## When to prefer this

Choose this endpoint when you need to measure latency for multiple URLs (2–20) simultaneously rather than making sequential single-URL calls. It is more efficient and cost-effective than calling the single /monitor/latency endpoint repeatedly. Ideal for fleet monitoring, bulk health checks, benchmarking sets of endpoints, or any workflow where an agent holds a list of URLs and needs latency data for all of them in one round trip.

## Known failure modes

- URL unreachable or times out — per-item error field populated, counted in failure total
- Invalid URL format in input list — item marked as error
- Batch exceeds 20 URL limit — request rejected
- Target server returns non-2xx status — may be flagged as error depending on implementation
- Network-level failures (DNS resolution, connection refused) — per-item error returned

## How this service works

Bulk latency probe: up to 20 urls in one call, processed concurrently, results returned in input order with a per-item error field and a count of failures. Same answer per item as the single /monitor/latency endpoint (Latency probe). Batch enrichment for agents that hold a list. $0.01 per batch.

## Output

An ordered array of per-item latency results matching the input URL order. Each item contains the measured HTTP response latency (in milliseconds), a per-item error field indicating any failure, and a summary count of total failures across the batch.

## 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": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/latency-probe-bulk-03667ae4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)