x402basequality 0.30

x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/invoices/35

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment wall. The specific resource `/api/v1/stripe/invoices/35` appears to be a Stripe invoice-related endpoint, though the exact functionality is not documented beyond the generic label. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme.

The hosting site lowpaymentfee.com advertises a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/crypto data feeds, and utility services. All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no commitments. However, this particular invoice endpoint's x402 challenge specifies a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 — consistent with the site-wide pricing.

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 spec, no request/response schema, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body is expected or what the response contains. The endpoint accepts POST requests.

Capabilities

x402-paymentusdc-settlementbase-networkstripe-invoicespay-per-call

Use cases

  • —Programmatically accessing Stripe invoice data via a crypto-paid endpoint
  • —Agent-driven invoice retrieval without traditional API key authentication
  • —Integrating pay-per-call invoice lookups into Web3 workflows

Fit

Best for

  • —Developers wanting keyless, pay-per-request access to invoice data
  • —AI agents that can settle x402 payments on Base in USDC
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Anyone needing detailed API documentation or response schemas before integrating
  • —High-volume invoice processing where $0.02/request adds up significantly
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/35 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/invoices/35
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. The specific purpose of this invoice endpoint is unclear.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages are all empty
  • —No OpenAPI or request/response schema provided; request body format is unknown
  • —The exact functionality of /api/v1/stripe/invoices/35 is undocumented — 'Premium API Access' is a generic label
  • —Site appears to be a demo or early-stage project with many listed endpoints but no substantive docs

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:32:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/urzeJ5