AI Text Summarizer API

AI text and URL summarizer -- key points, word count reduction, reading time. Fast extractive summaries for agents. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "ai-summarizer": {
      "url": "https://ai-summarizer.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://ai-summarizer.api.klymax402.com/api/summarize" \
  -H "Content-Type: application/json" \
  -d '{"text":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
ai_summarize_text	POST	/api/summarize	$0.03	Summarize raw text into key points
ai_summarize_url	GET	/api/summarize	$0.04	Fetch a URL and summarize its content

ai_summarize_text

Use this when you need to summarize long text into concise key points. Returns a structured summary with bullet points and reading metrics.

Parameters

Name	Type	Required	Description
text	string	yes	The text to summarize
maxLength	number	no	Maximum summary length in words (default 200)

Returns

• summary -- condensed text summary (respects maxLength)
• keyPoints -- array of 3-7 extracted key takeaways
• wordCountOriginal -- word count of input text
• wordCountSummary -- word count of output summary
• reductionPercent -- percentage of text reduced (e.g. 78%)
• readingTimeMinutes -- estimated reading time for the summary

Example response:

{"summary":"The article discusses...","keyPoints":["AI adoption grew 40%","Enterprise spending up"],"wordCountOriginal":2500,"wordCountSummary":180,"reductionPercent":92,"readingTimeMinutes":1}

When to use: presenting lengthy content to users. Essential for digesting articles, reports, meeting notes, or documentation into actionable summaries.

ai_summarize_url

Use this when you need to summarize a web page by URL. Fetches the page, extracts text, and returns a structured summary with key points and reading metrics.

Parameters

Name	Type	Required	Description
url	string	yes	URL of the web page to summarize
maxLength	number	no	Maximum summary length in words (default 200)

Returns

• summary -- condensed text summary of the page content
• keyPoints -- array of 3-7 key takeaways from the page
• wordCountOriginal -- word count of the full page text
• wordCountSummary -- word count of the summary
• reductionPercent -- percentage of content reduced
• readingTimeMinutes -- estimated reading time for the summary
• title -- page title extracted from HTML

Example response:

{"title":"OpenAI Blog","summary":"The post announces...","keyPoints":["GPT-5 launches Q3","API pricing drops 50%"],"wordCountOriginal":4200,"wordCountSummary":200,"reductionPercent":95,"readingTimeMinutes":1}

When to use: citing or referencing web articles. Essential for quickly understanding web pages without reading the full content.

Example agent prompts

• "Summarize long text into concise key points"
• "Summarize a web page by URL"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT