# MilliAPI Site Readiness Change Detector

> MilliAPI Site Readiness Change Detector is a paid API for AI agents from milliapi.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Detects changes in a website's AI-readiness score and signals since a prior baseline audit, returning a diff of what changed and a new baseline token.

## Facts

- Endpoint: POST https://milliapi.com/api/site-readiness-change
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/milliapi-site-readiness-change-detector-e60c82d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eCKsbGsvojL6biWnc8jjQ

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 milliapi-site-readiness-change-detector-e60c82d0 -d '<json body>'
```

Example prompt: Check whether example.com's AI readiness has changed since my last audit — use this baseline token 'tok_abc123' and tell me if the score went up or down and what specifically changed.

## When to prefer this

Use this endpoint when you already have a baseline token from a prior MilliAPI site readiness audit and want to detect what changed — rather than doing a full fresh audit. It is ideal for scheduled monitoring workflows, post-deployment regression checks, or competitive tracking where you need a lightweight diff rather than a full report. It costs $0.003 USDC per call via x402 on Base.

## Known failure modes

- Invalid or expired baselineToken returns an error — tokens must come from a prior /api/agent-web-audit call
- Malformed or non-HTTPS URL causes a 400 validation error
- Unreachable or timing-out target URL may result in a fetch error
- Payment not included or insufficient USDC via x402 returns a 402 response
- Method must be GET, HEAD, or DELETE — POST/PUT not accepted in the input method field

## How this service works

Tiny machine-readable APIs that AI agents can discover, pay for with x402 USDC on Base, and use instantly. Services start at $0.001 per call.

## Output

Returns a JSON object with: a boolean 'changed' flag, an array of 'changes' listing which signals flipped (e.g. llms.present went from false to true), the 'verdict' before and after (e.g. needs_work → mostly_ready), a numeric 'scoreDelta' showing how much the AI readiness score shifted, the product name, and a 'nextBaselineToken' to use for the next comparison cycle.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      },
      "baselineToken": {
       "type": "string",
       "description": "Portable baseline token returned by a prior /api/agent-web-audit or batch result."
      }
     },
     "required": [
      "url",
      "baselineToken"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "product": {
       "type": "string"
      },
      "changed": {
       "type": "boolean"
      },
      "scoreDelta": {
       "type": "number"
      },
      "verdict": {
       "type": "object"
      },
      "changes": {
       "type": "array"
      },
      "current": {
       "type": "object"
      },
      "nextBaselineToken": {
       "type": "string"
      }
     },
     "required": [
      "product",
      "changed",
      "scoreDelta",
      "verdict",
      "changes",
      "current",
      "nextBaselineToken"
     ]
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "changed": true,
  "changes": [
   {
    "id": "llms.present",
    "after": true,
    "before": false
   }
  ],
  "product": "MilliAPI Site Readiness Change",
  "verdict": {
   "after": "mostly_ready",
   "before": "needs_work"
  },
  "scoreDelta": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/milliapi-site-readiness-change-detector-e60c82d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from milliapi.com](https://www.zero.xyz/host/milliapi.com/llms.txt)