Fresh402

Detect webpage and API changes. Free baseline; $0.005 USDC per check via x402 on Base.

Should I use this

Quality & Safety

B
Description quality
90%
Schema completeness
75%
Naming quality
80%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~390Tokens (tool definitions)
~1.5 KBTypical response size
Minimal attention impact (0.30% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "fresh402": {
      "url": "https://fresh402.kirilllabs.workers.dev/mcp"
    }
  }
}

Remote endpoints

https://fresh402.kirilllabs.workers.dev/mcpstreamable-http

What it can do

Tool inventory

Tools (2)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟡fresh402_register(url, selector, ignore_selectors, ignore_json_paths)

Create or retrieve a free Fresh402 baseline and persistent watch_id. Existing baselines are returned without refetching, so this tool cannot be used as a free repeated change check.

Input Schema

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "format": "uri"
    },
    "selector": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "ignore_selectors": {
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 256
      }
    },
    "ignore_json_paths": {
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 256
      }
    }
  },
  "required": [
    "url"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}
🟢fresh402_check(watch_id, url, previous_hash, selector, ignore_selectors, ...)

Check whether a registered or caller-supplied web resource changed. Costs $0.005 USDC. Use fresh402_register first for a free baseline when starting a new watch.

Input Schema

{
  "type": "object",
  "properties": {
    "watch_id": {
      "type": "string",
      "pattern": "^w_[a-f0-9]{32}$"
    },
    "url": {
      "type": "string",
      "format": "uri"
    },
    "previous_hash": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{64}$"
    },
    "selector": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "ignore_selectors": {
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 256
      }
    },
    "ignore_json_paths": {
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 256
      }
    },
    "max_age_seconds": {
      "type": "integer",
      "minimum": 0,
      "maximum": 86400
    },
    "include_diff": {
      "type": "boolean"
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

Community

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Evidence

Recent observations

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