x402basequality 0.30

x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/charges/98

What it does

lowpaymentfee.com is an x402 protocol API marketplace that gates access to a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint at `/api/v1/stripe/charges/98` is listed as "Premium API Access" and accepts POST requests. Payment is settled on-chain via USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, with a maximum amount of 20,000 base units — equivalent to $0.02 USD (USDC uses 6 decimals). The x402 challenge was successfully captured, confirming the endpoint is live.

The broader platform advertises four categories of APIs: 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 API keys, no rate limits, and no minimum commitments required.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available. The actual functionality behind this specific endpoint path (`/stripe/charges/98`) is unclear; the name suggests it may relate to Stripe charge processing, but no documentation confirms what input it expects or what it returns.

Capabilities

x402-paymentusdc-micropaymentbase-networkper-request-billingno-api-keypost-endpoint

Use cases

  • —Paying per-request for API access without needing API keys or subscriptions
  • —Integrating on-chain micropayment-gated services into agent workflows
  • —Accessing premium API functionality via x402 protocol on Base

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can settle x402 USDC payments on Base
  • —Projects needing low-cost per-call API billing without signup

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Applications requiring high-throughput with predictable flat-rate pricing
  • —Developers without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/98 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/charges/98
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 beyond the landing page listing. No OpenAPI schema, no request/response examples, and the specific endpoint's purpose is ambiguous. The docs, pricing, and README pages are all empty wallet-connect stubs.

Warnings

  • —No OpenAPI schema or endpoint documentation available
  • —The /docs, /pricing, /api, and /README pages contain no useful content beyond a wallet connect prompt
  • —The specific endpoint path '/api/v1/stripe/charges/98' purpose is unclear — the name suggests Stripe charge processing but no documentation confirms functionality
  • —No request body schema or response schema is documented anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:46:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/xKkWSR
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart