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/54/transactions

What it does

This endpoint at lowpaymentfee.com exposes a card-transactions resource at `/api/v1/cards/54/transactions` behind an x402 payment challenge. It is part of a broader platform that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint listed here appears to relate to card transaction data (card ID 54). The x402 challenge confirms it accepts POST requests, requires an exact-scheme payment of up to 20,000 base units of USDC (0x8335…on Base, 6 decimals → $0.02), and pays out to address 0x1A2B…85F3. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment protocol. The endpoint returns application/json.

Documentation on the site 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 fields the transactions endpoint accepts or returns. The platform's landing page confirms the pricing model and lists many endpoints, but provides no technical detail beyond endpoint paths and one-line labels. Treat this listing as a stub until richer documentation becomes available.

Capabilities

x402-paymentusdc-basecard-transactionspay-per-requestno-api-keypost-endpoint

Use cases

  • —Fetching transaction history for a specific card
  • —Programmatic access to card transaction records without API key management
  • —Agent-driven financial data retrieval with per-call USDC micropayments

Fit

Best for

  • —Developers wanting keyless, pay-per-call access to card transaction data
  • —AI agents that can settle x402 payments on Base
  • —Projects needing low-friction financial API access without subscriptions

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume batch processing where per-call pricing may add up
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/54/transactions
# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof on Base to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/54/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request/response schemas, no OpenAPI spec, and all doc pages render only 'Connect wallet'. The specific purpose of the card-transactions endpoint is unclear beyond its URL path. Effectively a stub.

Warnings

  • —No OpenAPI schema or request/response documentation available
  • —All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content
  • —The purpose and expected input/output of the /api/v1/cards/54/transactions endpoint is not documented anywhere
  • —Cannot verify what data is actually returned upon successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:04:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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