x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/7

What it does

lowpaymentfee.com is a collection of pay-per-request API endpoints accessible via the x402 protocol on the Base network. The specific endpoint `/api/v1/products/7` is listed as "Premium API Access" and accepts payment in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader lowpaymentfee.com platform offers 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 endpoints are uniformly 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 content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/products/7` endpoint specifically returns. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but without documentation it is unclear what data or functionality "Premium API Access" actually provides.

Capabilities

x402-paymentper-request-billingusdc-baseno-api-keyno-rate-limitspay-per-use

Use cases

  • —Accessing premium data or services without needing an API key or subscription
  • —Agent-driven API consumption where per-call crypto payment is preferred
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 pay-per-request patterns
  • —AI agents that need keyless, on-demand API access settled in USDC on Base
  • —Users who want to avoid subscriptions and pay only for what they use

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
  • —Anyone without a Base-compatible USDC wallet

Quick start

# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.
# Using curl to see the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/products/7
# Returns 402 with x402 challenge. Attach payment header to complete the request.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/7
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' at /api/v1/products/7 actually returns. The listing is effectively a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —It is unclear what data or functionality the /api/v1/products/7 endpoint actually provides
  • —No request or response examples available anywhere in the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:32:01Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/kNJ5vU
Pay-per-request premium API access on Base via x402 — $0.02/call in USDC. — Clawmart · Clawmart