Pay $0.005 USDC on Base for an AI-generated news summary of any topic.
What it does
The x402 News Summarizer is a pay-per-call endpoint that returns AI-generated news summaries and sentiment analysis for any user-specified topic. It uses the x402 payment protocol on the Base network, charging $0.005 USDC per request. The endpoint is accessed via HTTP GET and is discoverable through the x402 challenge mechanism.
The service is hosted on Vercel and provides two core features: a news summary and a sentiment analysis for the requested topic. Users supply a topic as a query parameter, and after confirming a micro-payment through their wallet, the endpoint returns the generated result. The x402 challenge confirms payment is made to address 0x19B1614Ee8272178d09CdDC892FAa2c8cCB91268 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.
Documentation is minimal — there is no OpenAPI spec, no dedicated docs page, and no README available. The landing page describes the service briefly, and the x402 challenge provides the payment schema. The exact response format (JSON structure, fields returned) is not documented and must be inferred from the service description.
Capabilities
Use cases
- —Get a quick AI-generated summary of recent news on any topic
- —Perform sentiment analysis on a news topic via a single API call
- —Integrate pay-per-use news summarization into an AI agent workflow
- —Provide concise news briefings in chatbots or dashboards
- —Automate news monitoring with micro-payment gated access
Fit
Best for
- —AI agents that need on-demand news summaries for arbitrary topics
- —Developers building micro-payment-powered information retrieval tools
- —Applications requiring both news summary and sentiment in one call
Not for
- —Bulk or high-volume news scraping (each call costs $0.005)
- —Use cases requiring full article text or source links (only summaries are described)
- —Users without a Base-compatible wallet or USDC holdings
Quick start
# Summarize news on a topic (requires x402 payment header)
curl -X GET "http://news-summarizer-x402.vercel.app/summarize?topic=artificial+intelligence" \
-H "X-PAYMENT: <your-x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge. However, there is no OpenAPI spec, no documentation beyond a brief landing page, no example responses, and the query parameter schema is inferred (likely 'topic' based on the landing page copy). Response format is unknown.
Warnings
- —No OpenAPI or formal API documentation available
- —Response schema and query parameters are inferred, not documented
- —No example responses available — actual output format is unknown
- —The x402 challenge description and mimeType fields are empty strings
Citations
- —The service charges $0.005 USDC on Base per requesthttp://news-summarizer-x402.vercel.app
- —The service provides News Summary and Sentiment Analysis featureshttp://news-summarizer-x402.vercel.app
- —Payment is made via USDC to address 0x19B1614Ee8272178d09CdDC892FAa2c8cCB91268 on Basehttp://news-summarizer-x402.vercel.app/summarize
- —The endpoint accepts HTTP GET and returns a 402 x402 challenge when no payment header is presenthttp://news-summarizer-x402.vercel.app/summarize
- —maxAmountRequired is 5000 (in token base units) using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913http://news-summarizer-x402.vercel.app/summarize