x402basequality 0.30

x402-gated notification endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/notifications/16

What it does

This endpoint at `/api/v1/notifications/16` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or subscriptions required.

The specific endpoint probed (`/api/v1/notifications/16`) is listed under the title "Premium API Access" but its exact functionality is unclear — the name suggests a notification-related resource (possibly retrieving or triggering a specific notification by ID), but no documentation, request schema, or response schema is available beyond the x402 challenge. The endpoint is live and returns a valid x402 payment challenge (version 1, scheme "exact") requesting up to 20,000 base units of USDC (0.02 USD given 6 decimals) to wallet `0x1A2B…85F3` on Base. The method is POST and the output MIME type is `application/json`.

The broader lowpaymentfee.com platform advertises roughly 16 endpoints across four categories: Data & Analytics (metrics, reports, export, insights), AI & Machine Learning (sentiment, summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All share the same $0.02 USDC pricing. No OpenAPI spec, detailed docs, or example payloads were found during the crawl.

Capabilities

x402-paymentusdc-basepay-per-requestnotification-apijson-response

Use cases

  • —Retrieving or triggering a specific notification via a pay-per-call model
  • —Integrating low-cost notification services into agent workflows
  • —Testing x402 payment flows with a cheap live endpoint

Fit

Best for

  • —Developers exploring x402 protocol integrations
  • —Agents needing simple pay-per-request notification access
  • —Low-cost experimentation with crypto-settled APIs

Not for

  • —Production notification systems requiring documented SLAs and schemas
  • —Users who need detailed API documentation before integrating
  • —High-volume notification pipelines where per-call pricing adds up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/notifications/16 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/notifications/16
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific purpose of /api/v1/notifications/16 is unclear. The platform landing page provides only a brief catalog listing with uniform pricing. This is effectively a stub listing.

Warnings

  • —No API documentation, OpenAPI spec, or request/response schema available
  • —The exact functionality of /api/v1/notifications/16 is undocumented — 'Premium API Access' is a generic label
  • —No examples of successful responses were found
  • —The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:51:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/txGhPf
x402-gated notification endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart