Pay-per-call text summarization API on Base via x402, $0.02 per request in USDC.
What it does
The `/api/v2/ai/summarize` endpoint on lowpaymentfee.com provides a text summarization service accessible via the x402 payment protocol. Each call costs $0.02, paid in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to a POST request and receive a summarized version of the submitted text.
The endpoint is part of a broader suite of AI and ML endpoints offered by the same provider, including sentiment analysis, text classification, and embeddings generation, all priced at $0.02 per request. The x402 challenge confirms the endpoint is live, accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base, with a maximum timeout of 300 seconds.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of accepted input fields or output format. The endpoint's actual summarization capabilities (model used, supported languages, input length limits, output format) are unknown from the available material.
Capabilities
Use cases
- —Summarizing long articles or documents into concise text on demand
- —Integrating pay-per-call summarization into agent workflows without managing API keys
- —Building content pipelines that condense text before further processing
Fit
Best for
- —Agents needing on-demand text summarization without subscription commitments
- —Low-volume or bursty summarization workloads where per-call pricing is economical
- —Crypto-native applications that can pay in USDC on Base
Not for
- —High-volume summarization where per-call costs add up quickly versus flat-rate alternatives
- —Use cases requiring detailed documentation, SLAs, or guaranteed model specifications
Quick start
curl -X POST https://lowpaymentfee.com/api/v2/ai/summarize \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>" \
-d '{"text": "Your long text to summarize goes here..."}'Example
Request
{
"text": "Your long text to summarize goes here. It can be multiple paragraphs of content that you want condensed into a shorter summary."
}Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation beyond a wallet-connect prompt, and no information about the underlying model or input/output format. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema describing request body fields or response format.
- —Underlying summarization model, supported languages, and input size limits are unknown.
- —Request and response JSON examples are inferred/speculative — no actual examples were found in source material.
Citations
- —The endpoint returns a valid x402 challenge with status 402, confirming it is live.https://lowpaymentfee.com/api/v2/ai/summarize
- —Price is $0.02 per request, paid in USDC on Base network.https://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and payTo is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.https://lowpaymentfee.com/api/v2/ai/summarize
- —No API keys, no rate limits, instant access advertised.https://lowpaymentfee.com
- —Provider offers additional AI endpoints including sentiment, classification, and embeddings, all at $0.02.https://lowpaymentfee.com