# CostPulse AWS Cross-Region Price Comparison

> CostPulse AWS Cross-Region Price Comparison is a paid API for AI agents from costpulse.waltsoft.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the cheapest AWS region for a given service or SKU, along with all-region pricing and savings data in a single API call.

## Facts

- Endpoint: GET https://costpulse.waltsoft.net/v1/cheapest
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/costpulse-waltsoft-net-9b2364b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XsO9bibfb7or4fpVvBuIi

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 costpulse-waltsoft-net-9b2364b4
```

Example prompt: Which AWS region is cheapest for running EC2 right now? Compare all regions and tell me how much I'd save versus the most expensive option.

## When to prefer this

Use this endpoint when you need to quickly identify the lowest-cost AWS region for a specific service or SKU without manually querying the AWS pricing API across all regions. Ideal for cost optimization workflows, infrastructure planning, or automated budget checks where cross-region price comparison is needed in a single call.

## Known failure modes

- Unknown or misspelled service name returns no results or error
- Invalid SKU returns empty or error response
- AWS pricing data temporarily unavailable
- Payment of $0.01 USDC not processed results in 402 error
- Rate limiting if too many requests in quick succession

## How this service works

Cross-region AWS price comparison. Find the cheapest region for any service in one API call.

## Output

Returns a JSON object with the cheapest region and its price, a full list of all regions compared with their prices, the most expensive region, total number of regions compared, and the percentage savings versus the most expensive region.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "sku": {
   "type": "string"
  },
  "service": {
   "type": "string"
  },
  "cheapest": {
   "type": "object"
  },
  "all_regions": {
   "type": "array"
  },
  "most_expensive": {
   "type": "object"
  },
  "regions_compared": {
   "type": "integer"
  },
  "savings_vs_most_expensive": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/costpulse-waltsoft-net-9b2364b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from costpulse.waltsoft.net](https://www.zero.xyz/host/costpulse.waltsoft.net/llms.txt)