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/313

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource at `/api/v1/charges/313` 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 handled inline via the X-PAYMENT header with no API keys or accounts required.

The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs across four 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 listed at $0.02 per request with no rate limits or minimum commitments.

However, the specific endpoint `/api/v1/charges/313` is labeled only as "Premium API Access" with no further documentation about what data or functionality it returns. The docs, pricing, and API pages on the site render only a "Connect wallet" prompt with no additional technical detail. Without an OpenAPI schema, example responses, or detailed documentation, it is unclear what payload this particular endpoint expects or returns.

Capabilities

x402-paymentpay-per-callusdc-baseno-api-keypost-endpointjson-response

Use cases

  • —Programmatic access to a premium API resource without needing API keys or accounts
  • —Agent-driven workflows that pay per call using USDC on Base
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents that can settle USDC payments on Base automatically
  • —Users who want pay-as-you-go access without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume batch processing where per-call pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/313 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/313
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI schema, no example request/response, and the docs pages are empty (just 'Connect wallet'). The specific functionality behind '/api/v1/charges/313' is undocumented beyond the generic label 'Premium API Access'. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'
  • —The specific functionality of /api/v1/charges/313 is unknown; 'Premium API Access' is the only description
  • —No OpenAPI schema or example responses provided
  • —No input schema documented — unclear what POST body is expected
  • —The site lists many endpoints but none have detailed docs; actual availability and functionality are unverified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:47:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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