# Saylor Innovations Guide Library: Web Performance and Core Web Vitals

> Saylor Innovations Guide Library: Web Performance and Core Web Vitals is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-03).

Returns a knowledge base article on Web Performance and Core Web Vitals concepts, best practices, and guidance

## Facts

- Endpoint: GET https://saylorinnovations.com/api/kb/web-performance-vitals?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-guide-library-web-performance-and-core-web-vitals-c7a95ed0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qJmPd4bZapXIJAMtWJ7sn

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 saylor-innovations-guide-library-web-performance-and-core-web-vitals-c7a95ed0
```

Example prompt: Can you pull up the Saylor Innovations guide on Web Performance and Core Web Vitals so I can understand what the key metrics are and how to improve them?

## When to prefer this

Choose this endpoint when you need a curated, structured knowledge article specifically about Web Performance and Core Web Vitals — ideal for agents that need authoritative reference content to explain metrics, thresholds, and optimization strategies to users without crawling the open web. Prefer this over generic web search when you want a concise, pre-packaged guide rather than raw search results.

## Known failure modes

- Payment not provided or invalid — endpoint requires $0.01 USDC via x402 protocol
- Article not found or unavailable — returns empty or error response
- Malformed request type or method fields — schema validation error
- Network timeout or server unavailability

## How this service works

Web Performance and Core Web Vitals — Web & Domains

## Output

A JSON object containing a knowledge article with fields: a unique article ID, title (t), category (c), body text containing the full guidance content, an optional price, and a license string. The body covers web performance concepts and Core Web Vitals best practices.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "id",
      "t",
      "c",
      "body"
     ],
     "properties": {
      "c": {
       "type": "string"
      },
      "t": {
       "type": "string"
      },
      "id": {
       "type": "string"
      },
      "body": {
       "type": "string"
      },
      "price": {
       "type": [
        "number",
        "null"
       ]
      },
      "license": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-guide-library-web-performance-and-core-web-vitals-c7a95ed0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)