x402basequality 0.30

x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/invoices/147

What it does

This endpoint at lowpaymentfee.com provides access to a specific Stripe invoice resource (invoice #147) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme.

The specific endpoint `/api/v1/stripe/invoices/147` is listed as "Premium API Access" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals = $0.02). The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all at $0.02 per request with no API keys, no rate limits, and no commitments required.

However, this particular endpoint's purpose is narrow: it appears to serve a single Stripe invoice resource. There is no OpenAPI schema, no documentation beyond the landing page, and the docs/pricing/API pages all render only a "Connect wallet" prompt with no additional content. The actual response payload and input parameters for this endpoint are undocumented, making it difficult to know what data is returned or what POST body is expected.

Capabilities

x402-paymentusdc-settlementbase-networkstripe-invoice-accesspay-per-requestno-api-key

Use cases

  • —Retrieving Stripe invoice data for invoice #147 via a crypto-paywall
  • —Demonstrating x402 payment protocol integration with USDC on Base
  • —Agent-driven invoice retrieval without traditional API key authentication

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-per-call access to invoice data
  • —Projects already using USDC on Base for micropayments

Not for

  • —Production invoice management requiring bulk or parameterized queries
  • —Users needing detailed API documentation or schema guarantees
  • —Anyone needing access to invoices other than #147

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/147 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/invoices/147
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid x402 402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, no examples, and the endpoint targets a single hardcoded invoice resource. The docs, pricing, and API pages are all empty beyond a wallet-connect prompt.

Warnings

  • —No OpenAPI or request/response schema available — input and output formats are unknown
  • —Endpoint targets a single hardcoded resource (invoice 147); unclear if this is a demo or production resource
  • —Documentation pages (/docs, /pricing, /api, /README) contain no useful content beyond 'Connect wallet'
  • —The broader platform advertises many API categories but none are documented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:18:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/VScBGW
x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart