AI Text Summarizer API

Summarize raw text or any web URL into key points, with compression ratio and reading-time metrics. Pay-per-call via x402 (USDC on Base L2) — no API key, no signup.

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

Quickstart — MCP

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

Quickstart — HTTP (x402)

curl "https://ai-summarizer.api.klymax402.com/api/summarize?url=https://example.com/article"
→ 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 | $0.01 | Summarize raw text into key points |
| ai_summarize_url | GET | /api/summarize | $0.015 | 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, keyPoints[] (3-7 extracted takeaways), wordCountOriginal, wordCountSummary, reductionPercent, readingTimeMinutes.

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: before presenting lengthy content to users — digesting articles, reports, meeting notes, or documentation into actionable summaries.

Not for: full content extraction (use web_scrape_to_markdown), SEO analysis (use seo_audit_page), sentiment analysis (use text_analyze_sentiment).

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, keyPoints[], wordCountOriginal, wordCountSummary, reductionPercent, readingTimeMinutes, title, sourceUrl.

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: before citing or referencing web articles — quickly understanding web pages without reading the full content.

Not for: full content extraction (use web_scrape_to_markdown), SEO analysis (use seo_audit_page), screenshot capture (use capture_screenshot).

Example agent prompts

- "Summarize this article in 100 words: https://..."
- "Give me the key points from this text before I include it in my report"
- "Summarize this URL and tell me the reading time"

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