x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/205

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/charges/205` is listed as "Premium API Access" and requires a maximum of 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The x402 challenge confirms the endpoint is live, accepts POST requests, and settles payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` is the canonical USDC contract on Base.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation is extremely thin: the docs, API, pricing, 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 content. The actual behavior and response format of this specific endpoint (`/api/v1/charges/205`) is unknown beyond its x402 challenge metadata.

Capabilities

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

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Programmatic access to data, AI, finance, or utility endpoints without subscriptions

Fit

Best for

  • —Developers wanting zero-commitment, pay-per-use API access
  • —AI agents with x402-compatible payment capabilities
  • —Users who prefer crypto-native micropayments over traditional API billing

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where per-request pricing may add up compared to subscription plans
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/205 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/205
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and confirms pricing and network details, but there is no OpenAPI spec, no request/response schema, and all documentation pages return only a 'Connect wallet' stub. The actual functionality behind '/api/v1/charges/205' is undocumented and unclear.

Warnings

  • —No OpenAPI or schema documentation available — endpoint behavior is unknown beyond x402 challenge metadata
  • —All doc/pricing/README pages render only 'Connect wallet' with no technical content
  • —The specific endpoint '/api/v1/charges/205' does not appear in the site's listed API catalog, so its purpose is unclear
  • —No request body schema or response format documented anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:31:11Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Q9THSs
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart