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/202

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/charges/202` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per call (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader lowpaymentfee.com platform advertises 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 listed endpoints are priced at $0.02 per request.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific functionality behind the `/api/v1/charges/202` endpoint is unclear beyond its "Premium API Access" label. The x402 challenge confirms the endpoint is live and accepting payment negotiations.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Agents needing on-demand API access without pre-registration or API keys
  • —Programmatic pay-per-call access to data, AI, finance, or utility endpoints
  • —Crypto-native applications that settle micro-transactions in USDC on Base

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents with x402-compatible payment capabilities
  • —Low-cost micro-transaction API consumption at $0.02/call

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or subscription discounts
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/202 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/202
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation for request/response schemas, no OpenAPI spec, and the actual functionality behind /api/v1/charges/202 is undefined. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
  • —The specific functionality of /api/v1/charges/202 ('Premium API Access') is not documented — unclear what data or service it returns
  • —No usage examples or error handling documentation found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:36:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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