# Strale Website Carbon Estimate

> Strale Website Carbon Estimate is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054/call, status unknown (last checked 2026-09-14).

Estimates the carbon footprint and environmental impact of a given website URL

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/website-carbon-estimate
- Price: $0.054/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-website-carbon-estimate-8d08a2f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t4QA9e3GXjUkjt5hPoFbo

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 strale-website-carbon-estimate-8d08a2f1
```

Example prompt: Can you estimate the carbon footprint of https://www.example.com and tell me how environmentally friendly it is?

## When to prefer this

Use this endpoint when you need a quick, independently audited estimate of a website's carbon footprint without setting up your own measurement infrastructure. It is especially useful for sustainability reporting, green auditing workflows, or comparing environmental impact across multiple sites, and it provides a cryptographic audit trail via Strale's trust layer that alternative tools lack.

## Known failure modes

- Invalid or unreachable URL returns an error indicating the site could not be analyzed
- Timeout if the target website is slow to respond
- Malformed URL input results in a validation error
- Rate limiting or quota exhaustion may return a 402 or 429 response

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns an estimated carbon output (typically in grams of CO2 per page view), along with a rating or comparison of how the site performs environmentally relative to benchmarks. Each response also includes a cryptographically hashed audit record for traceability.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-website-carbon-estimate-8d08a2f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)