x402basequality 0.30

x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/invoices/121

What it does

This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 121) behind an x402 paywall. The provider operates a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all gated via the x402 protocol on the Base network. Each call costs $0.02 in USDC (USD Coin) with no API keys, no rate limits, and no subscriptions required.

The specific endpoint `/api/v1/stripe/invoices/121` is labeled "Premium API Access" in the x402 challenge. It accepts HTTP POST requests and returns application/json. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

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 spec, no request/response schema documentation, and no examples of what the invoice endpoint actually returns. The provider's landing page lists many other endpoints across categories (analytics, AI, finance, utilities) all at the same $0.02 price point, but none have documented schemas. The exact purpose and response format of this particular Stripe invoices endpoint is unclear from available materials.

Capabilities

x402-paymentusdc-basepay-per-requeststripe-invoicehttp-postjson-response

Use cases

  • —Retrieving Stripe invoice data via a crypto-gated pay-per-request model
  • —Demonstrating x402 protocol payment flows on Base network
  • —Accessing premium API resources without API keys or subscriptions

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base
  • —Use cases needing keyless, pay-per-call API access

Not for

  • —Production workloads requiring documented request/response schemas
  • —Users who need free or fiat-only payment options
  • —High-volume batch processing where per-request costs add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/121 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/invoices/121
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 spec, no documented request/response schema, no examples, and the docs/pricing/README pages are all empty beyond a wallet connect prompt. The actual purpose and output of the Stripe invoices endpoint is undocumented.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
  • —The exact purpose and response format of /api/v1/stripe/invoices/121 is unknown
  • —No request body schema or example responses are documented anywhere

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:23:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/2rXdWK
x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request. — Clawmart · Clawmart