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/charges/278

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource at `/api/v1/charges/278` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is settled on-chain to the specified wallet address with a 300-second timeout.

The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs 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 priced at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access.

However, the specific endpoint `/api/v1/charges/278` is labeled only as "Premium API Access" with no further documentation on what data or functionality it returns. The docs, pricing, and API pages on the site returned only a "Connect wallet" prompt with no additional content. Without an OpenAPI schema, example responses, or detailed documentation, the actual behavior of this endpoint remains unclear.

Capabilities

x402-paymentusdc-basepay-per-callno-api-keypost-endpoint

Use cases

  • —Accessing premium API functionality with per-call USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring no-signup, no-API-key access to paid endpoints

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —Applications requiring free or fiat-only payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/278 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/278
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no example request/response, and no documentation beyond a generic label. The docs/pricing/API pages all returned only 'Connect wallet' with no useful content. The actual functionality behind this specific charge ID is unknown.

Warnings

  • —No documentation available — docs, pricing, and API pages return only a 'Connect wallet' prompt
  • —The specific functionality of /api/v1/charges/278 ('Premium API Access') is not described anywhere
  • —No OpenAPI schema or example responses provided
  • —No information on what request body this POST endpoint expects

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:37:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/HCnqt7
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart