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/65

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment wall. When called without payment, it returns a 402 challenge requesting USDC on the Base network. The specific resource path (`/api/v1/stripe/invoices/65`) suggests it relates to Stripe invoice data, though no documentation beyond the generic title "Premium API Access" is available for this particular endpoint.

The parent site lowpaymentfee.com hosts a collection of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto market data, and utility services. All endpoints use the x402 protocol for payment, settling in USDC on the Base L2 network. The site advertises $0.02 per request across its catalog, with no API keys, no rate limits, and instant access. This specific endpoint's x402 challenge indicates a max amount 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 schema, no request/response examples, and no description of what this particular invoice endpoint returns or what input it expects. The endpoint accepts POST requests and returns application/json according to the x402 challenge metadata.

Capabilities

x402-paymentusdc-settlementbase-networkstripe-invoicespay-per-requestno-api-keyjson-response

Use cases

  • —Retrieving Stripe invoice data via a single pay-per-call request
  • —Programmatic access to invoice information without API key management
  • —Agent-driven invoice lookups settled in USDC on Base

Fit

Best for

  • —Developers wanting keyless, pay-per-use access to invoice data
  • —AI agents that can settle x402 payments in USDC on Base
  • —Quick one-off invoice lookups without subscription commitments

Not for

  • —Users needing detailed API documentation or schema guarantees before integration
  • —High-volume invoice processing where per-call pricing adds up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/65 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/invoices/65
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 OpenAPI schema, no request/response examples, no documentation for this specific endpoint, and the docs pages are empty. The purpose of the '/stripe/invoices/65' path is unclear — it could be a demo or a real invoice retrieval endpoint. Effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema definition for this endpoint
  • —The specific purpose of /api/v1/stripe/invoices/65 is undocumented; 'Premium API Access' is a generic label
  • —No request body schema or response examples available
  • —Cannot verify what data this endpoint actually returns after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:35:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/J8UFtN
x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart