x402basequality 0.35

x402-gated Premium API Access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/269

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The specific resource path is `/api/v1/charges/269`, which is one of many endpoints offered by the provider. The broader platform advertises categories including 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).

Payment is handled via the x402 protocol using USDC on Base (contract 0x8335…2913). The challenge advertises a maxAmountRequired of 20000 base units, which at 6 decimals equals $0.02 per request. The provider's landing page confirms a flat $0.02/request pricing model with no API keys, no rate limits, and no minimum commitments. The endpoint accepts POST requests and returns application/json.

However, the specific functionality behind `/api/v1/charges/269` is not documented beyond the label "Premium API Access." The crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no additional technical documentation, request/response schemas, or usage examples. Without knowing what this particular charge endpoint actually returns, callers should treat this as an opaque paid endpoint until more documentation surfaces.

Capabilities

x402-paymentusdc-baseper-request-billingjson-responsepost-method

Use cases

  • —Programmatic access to a paid API resource without API keys or subscriptions
  • —Agent-driven workflows that need on-demand paid endpoint calls settled in USDC on Base
  • —Testing x402 payment flows against a live, low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol integration
  • —AI agents that need keyless, pay-per-call API access
  • —Users who prefer crypto micropayments over traditional API billing

Not for

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

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/269 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/269
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation for what this specific endpoint actually does, no request/response schema, and no examples. The crawled docs/pricing/README pages were all empty beyond a wallet-connect prompt. The listing is effectively a stub.

Warnings

  • —No documentation available for what /api/v1/charges/269 specifically returns or accepts as input
  • —All doc pages (docs, pricing, README, api) returned only 'Connect wallet' with no content
  • —The endpoint label 'Premium API Access' is generic and does not describe functionality
  • —No OpenAPI spec, no request schema, no response schema available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:33:59Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/v4Hfjm
x402-gated Premium API Access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart