x402basequality 0.35

x402-gated premium API access on Base, paid per-request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/invoices/187

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. The specific resource path (`/api/v1/stripe/invoices/187`) suggests it returns invoice or billing-related data, though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme.

The x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this converts to $0.02 per request — consistent with the site-wide pricing of $0.02/request shown on the provider's landing page. The provider markets itself as offering no API keys, no rate limits, and instant access, with all payments handled on-chain on Base.

The provider hosts a broader suite of endpoints spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto data feeds, and utility services — all at the same $0.02/request price point. However, this specific listing covers only the `/api/v1/stripe/invoices/187` resource. Documentation beyond the landing page is essentially empty (all doc/pricing/API pages just show "Connect wallet"), so the exact request format and response schema for this endpoint are unknown.

Capabilities

x402-paymentusdc-settlementbase-networkper-request-billinginvoice-datajson-response

Use cases

  • —Retrieving invoice or billing data behind a per-request paywall
  • —Agent-driven on-chain micropayment API consumption
  • —Programmatic access to premium data without API key management

Fit

Best for

  • —Agents or bots that can settle x402 payments in USDC on Base
  • —Developers wanting keyless, pay-per-use API access
  • —Low-volume consumers who prefer no subscription commitments

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/187 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/invoices/187
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation of request parameters, response schema, or what data this endpoint actually returns. All doc pages are empty ('Connect wallet' only). The specific resource path '/api/v1/stripe/invoices/187' with a hardcoded ID is unusual and unexplained.

Warnings

  • —No API documentation available — all doc pages render only 'Connect wallet'
  • —Exact request body format and response schema are unknown
  • —The endpoint path contains a hardcoded invoice ID (187), which is unusual for a general-purpose API
  • —No OpenAPI spec, no examples, no error documentation provided

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:31:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/nLCTrh
x402-gated premium API access on Base, paid per-request in USDC. — Clawmart · Clawmart