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/products/69

What it does

lowpaymentfee.com is an x402 protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/products/69` is listed as "Premium API Access" and accepts POST requests with payment via the x402 exact scheme. The maximum amount required is 20,000 base units of USDC (0x8335…), which equals $0.02 per request given USDC's 6 decimal places.

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 the same $0.02/request price point. The platform emphasizes no API keys, no rate limits, no minimums, and instant access — callers simply attach an x402 payment header to each request.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for what the `/api/v1/products/69` endpoint actually returns or what input it expects beyond a POST method. The x402 challenge confirms the endpoint is live and correctly returning a 402 payment challenge, but the actual functionality behind this specific product ID is unclear.

Capabilities

x402-paymentusdc-micropaymentbase-networkper-request-billingno-api-keypost-methodjson-response

Use cases

  • —Accessing premium API data without subscription or API key management
  • —Making one-off paid API calls from autonomous agents via x402 protocol
  • —Integrating pay-per-use endpoints into workflows that settle on Base L2

Fit

Best for

  • —Developers wanting zero-commitment, pay-per-call API access
  • —AI agents that can autonomously pay for API calls via x402
  • —Projects already operating on the Base network with USDC

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-compatible wallet or USDC holdings

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/products/69 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/69
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is zero documentation for what this endpoint actually does or returns. No OpenAPI schema, no examples, and all doc pages render only 'Connect wallet'. The specific product (ID 69) has no description beyond the generic 'Premium API Access' label.

Warnings

  • —No documentation available — all doc/API/pricing/README pages show only 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format for /api/v1/products/69
  • —The purpose and output of this specific endpoint (products/69) is entirely unclear
  • —Cannot verify actual functionality behind the payment wall

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:35:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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