x402basequality 0.25

x402-gated card transactions endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/cards/13/transactions

What it does

This endpoint at lowpaymentfee.com provides access to a card transactions resource at `/api/v1/cards/13/transactions` via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint listed here (`/api/v1/cards/13/transactions`) is labeled "Premium API Access" in the x402 challenge. The challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals), and pays out to a specified Ethereum address on Base. No API keys or rate limits are advertised; access is gated entirely by the x402 payment header.

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 the card transactions endpoint actually returns or what parameters it accepts. The platform's landing page confirms the pricing model and lists other endpoints, but provides no technical detail about this specific resource. Prospective users should be aware that the actual functionality behind this endpoint is undocumented.

Capabilities

x402-paymentusdc-settlementbase-networkcard-transactionspay-per-requestno-api-key

Use cases

  • —Retrieving card transaction data via a single paid API call
  • —Integrating pay-per-request card data into agent workflows
  • —Accessing financial transaction records without API key management

Fit

Best for

  • —Agents or developers who want keyless, pay-per-call access to card transaction data
  • —x402-compatible clients on the Base network
  • —Low-volume or sporadic access patterns where per-request pricing is preferable to subscriptions

Not for

  • —Users who need detailed API documentation or request/response schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans
  • —Anyone not set up to pay with USDC on the Base network

Quick start

# POST with x402 payment header (USDC on Base, $0.02 per call)
curl -X POST https://lowpaymentfee.com/api/v1/cards/13/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/13/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint does, what parameters it accepts, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The listing is effectively a stub.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
  • —No OpenAPI or request/response schema provided; the actual functionality of /api/v1/cards/13/transactions is unknown.
  • —The endpoint path references a specific card ID (13), suggesting it may be a demo or placeholder resource.
  • —Cannot verify what data is returned or what POST body is expected.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 02:45:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/4dkjen
x402-gated card transactions endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart