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/73/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST route at `/api/v1/cards/73/transactions` behind an x402 payment challenge. The endpoint is part of a broader platform that offers various API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.

The specific `/cards/73/transactions` route appears to be a card-transaction resource, though the platform's own description labels it generically as "Premium API Access." The x402 challenge confirms the endpoint is live, accepting exact-scheme payments of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payments are sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

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 examples available. The input schema indicates it accepts HTTP POST requests and is marked as discoverable, but no body schema or response format is documented. The platform advertises no API keys, no rate limits, and instant access, but without documentation it is unclear what request body this particular endpoint expects or what data it returns.

Capabilities

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

Use cases

  • —Querying card transaction records programmatically via pay-per-call
  • —Integrating card transaction data into automated agent workflows
  • —Accessing financial card data without traditional API key management

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Use cases needing on-demand card transaction data without subscriptions
  • —Developers exploring x402 pay-per-request patterns

Not for

  • —Users who need detailed API documentation and response schemas before integrating
  • —High-volume batch processing where per-request pricing may add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/73/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/73/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of the specific /cards/73/transactions route is unclear beyond the generic 'Premium API Access' label. All doc pages return only 'Connect wallet' with no content.

Warnings

  • —No API documentation available — docs, pricing, and README pages all render only 'Connect wallet'
  • —No request body schema or response schema documented for this endpoint
  • —The purpose and data returned by /api/v1/cards/73/transactions is not explained anywhere
  • —The endpoint path references a specific card ID (73), which may be a placeholder or demo resource
  • —Cannot verify what data this endpoint actually returns without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:00:35Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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