x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/356

What it does

This endpoint at lowpaymentfee.com is one of many x402-enabled API endpoints offered by the provider. The specific resource at `/api/v1/payments/356` is labeled "Premium API Access" and accepts POST requests, settling payments in USDC on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the provider's site-wide flat pricing of $0.02/call.

The provider's landing page lists a broad catalog of endpoints spanning 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 advertised at the same $0.02 price point with no API keys, no rate limits, and instant access.

However, the specific functionality behind `/api/v1/payments/356` is not documented beyond the generic label "Premium API Access." The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for this or any other endpoint. The endpoint is live (returns a valid 402 challenge), but what it actually returns after payment is unknown.

Capabilities

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

Use cases

  • —Agent-initiated API calls with per-request USDC micropayments on Base
  • —Accessing premium data or services without traditional API key registration
  • —Programmatic pay-as-you-go access to undocumented premium functionality

Fit

Best for

  • —Developers or agents wanting keyless, pay-per-call API access settled in USDC on Base
  • —Users comfortable with x402 payment protocol for micropayments
  • —Scenarios where $0.02/request flat pricing is attractive

Not for

  • —Users who need detailed documentation or guaranteed SLAs before paying
  • —Anyone requiring non-crypto payment methods
  • —Production use cases that need well-documented request/response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/356 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/356
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the endpoint actually does or returns. No OpenAPI schema, no request/response examples, and the docs pages are empty. The label 'Premium API Access' is generic and uninformative. The provider lists many endpoints but documents none of them.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content
  • —The specific functionality of /api/v1/payments/356 ('Premium API Access') is completely undocumented
  • —No OpenAPI schema or request/response examples exist for any endpoint on this provider
  • —Cannot verify what data or service is returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:07:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/cRG6fZ
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart