x402basequality 0.30

Pay-per-call notification endpoint on Base via x402, settled in USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/notifications/28

What it does

This endpoint at `/api/v1/notifications/28` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at a flat rate of $0.02 per request. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific endpoint probed (`/api/v1/notifications/28`) is listed under the title "Premium API Access" but its exact functionality is not documented beyond that label. The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export, all at the same $0.02 price point. The x402 challenge confirms the endpoint is live, accepts POST requests, requires payment of up to 20,000 base units of USDC (i.e., $0.02 given 6 decimals), and settles to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.

Documentation is minimal — the site's /api, /pricing, and /README pages all resolve to a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint's actual input parameters and response format are unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keynotification-api

Use cases

  • —Triggering or retrieving notifications via a single paid API call
  • —Agent-driven workflows that need a low-friction, keyless notification service
  • —Demonstrating x402 payment protocol integration on Base

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —Agents that need keyless, per-call API access on Base
  • —Low-volume consumers who prefer pay-as-you-go pricing

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume notification pipelines where $0.02/call adds up quickly
  • —Anyone requiring non-crypto payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/notifications/28 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/notifications/28
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 OpenAPI spec, no request/response schema, no documentation beyond a generic title, and no examples. The actual functionality of '/api/v1/notifications/28' is unclear. Score reflects a near-stub level of available information.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —Endpoint purpose ('Premium API Access') is vague — actual notification behavior undocumented
  • —All documentation pages (/api, /pricing, /README) return only a 'Connect wallet' prompt with no content
  • —Input parameters and response format are completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:31:39Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/FQvFgE
Pay-per-call notification endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart