x402basequality 0.35

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/63

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 `/api/v1/products/63` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme — no API keys, accounts, or rate limits are required; callers simply attach an X-PAYMENT header with a valid payment proof.

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 settles payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.

Documentation is extremely sparse — 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 example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body the POST expects or what response payload it returns.

Capabilities

x402-paymentusdc-micropaymentbase-networkper-request-billingno-api-keypay-per-use

Use cases

  • —Accessing premium API data without creating an account or managing API keys
  • —Making one-off API calls with instant USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access

Fit

Best for

  • —Developers or agents wanting frictionless, keyless API access via crypto micropayments
  • —Low-volume or sporadic API consumers who prefer per-call pricing over subscriptions
  • —x402-compatible AI agents that can autonomously pay for API calls

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/63 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/63
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is effectively nonexistent — no OpenAPI spec, no request/response schemas, no examples, and all doc pages show only 'Connect wallet'. The specific purpose of /api/v1/products/63 ('Premium API Access') is vague and undifferentiated from the platform's other offerings.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages all render only 'Connect wallet' with no technical content
  • —No OpenAPI or JSON schema describing request or response formats for this endpoint
  • —The endpoint name 'Premium API Access' is generic and does not describe what data or functionality it provides
  • —Cannot verify what the endpoint actually returns without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:33:23Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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