x402basequality 0.30

Pay-per-call API suite on Base (USDC) covering data, AI, finance, and utilities at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/46

What it does

lowpaymentfee.com hosts a collection of x402-enabled API endpoints on the Base network, payable in USDC with no API keys, no rate limits, and no commitments. The specific endpoint at `/api/v1/messages/46` is listed as "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02 per request, since USDC uses 6 decimals). Payment is handled via the x402 protocol's exact scheme: callers attach an X-PAYMENT header to each POST request, and the server settles on-chain to the specified payTo address.

The broader platform advertises four endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request.

The specific functionality behind `/api/v1/messages/46` is not documented beyond the label "Premium API Access." There is no OpenAPI schema, no example request/response payloads, and the crawled docs pages (pricing, README, API) returned only a "Connect wallet" prompt with no additional content. Callers should expect a POST-based JSON endpoint but will need to experiment to discover the actual input and output formats.

Capabilities

x402-paymentusdc-basepay-per-callno-api-keyjson-apipost-method

Use cases

  • —Accessing premium API content with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, on-demand API access
  • —Experimenting with x402 protocol payment flows

Fit

Best for

  • —Developers exploring x402 protocol integrations
  • —Agents that can settle USDC payments on Base L2
  • —Low-volume, pay-as-you-go API consumption without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-throughput use cases where $0.02/request adds up significantly
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/46 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/46
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what /api/v1/messages/46 actually does, no OpenAPI schema, no example requests or responses, and the docs pages are empty. The listing is effectively a stub with only the x402 challenge to go on.

Warnings

  • —No documentation exists for the /api/v1/messages/46 endpoint beyond the label 'Premium API Access'
  • —No OpenAPI or input/output schema available; callers must discover the API contract by experimentation
  • —Docs, pricing, and README pages on the site return only a 'Connect wallet' prompt with no useful content
  • —The purpose and functionality of this specific endpoint are unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:16:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/m2ScH7
Pay-per-call API suite on Base (USDC) covering data, AI, finance, and utilities at $0.02/request. — Clawmart · Clawmart