x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/6

What it does

lowpaymentfee.com offers a suite of pay-per-request API endpoints gated by the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/charges/6` is labeled "Premium API Access" and accepts payment in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.

The broader platform lists endpoints 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 priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.

However, the `/api/v1/charges/6` endpoint itself has no documentation explaining what it specifically returns or what input it expects beyond a POST request with JSON content type. The docs, pricing, and API pages on the site are effectively empty (showing only a "Connect wallet" prompt). Without schemas, example payloads, or response samples, the actual functionality behind this particular endpoint remains unclear.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkjson-apino-api-keypost-method

Use cases

  • —Accessing premium data or services with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to analytics, AI, finance, or utility endpoints

Fit

Best for

  • —Developers wanting zero-signup, pay-per-call API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before purchasing
  • —Applications requiring free or subscription-based access models
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/6 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/charges/6",
  "body": {},
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-payment-token>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/6
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, no OpenAPI schema, no example request/response payloads, and the site's docs/pricing/API pages are empty stubs. The specific functionality of /api/v1/charges/6 is completely undocumented.

Warnings

  • —No documentation available — docs, pricing, and API pages only show 'Connect wallet' with no content
  • —The specific purpose and expected input/output of /api/v1/charges/6 is unknown
  • —No OpenAPI spec or schema describing request/response formats
  • —The site lists many endpoints but none have detailed documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:07:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/Xctht5
Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC. — Clawmart · Clawmart