x402basequality 0.30

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/77/transactions

What it does

This endpoint at lowpaymentfee.com exposes a card-transactions resource at `/api/v1/cards/77/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 and settled in USDC on the Base network.

The specific endpoint listed here appears to be a card-transaction lookup or creation resource (HTTP POST). The x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 "exact" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-request micropayments.

Documentation on the site is extremely thin — the docs, pricing, API, 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 usage examples available from the crawled material. The endpoint is confirmed live (returns HTTP 402 with a valid x402 challenge), but the actual functionality behind the paywall is not documented in any accessible way.

Capabilities

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

Use cases

  • —Retrieving or creating card transaction records via a single micropayment
  • —Programmatic access to card transaction data without API key management
  • —Agent-driven financial data retrieval with on-chain USDC settlement

Fit

Best for

  • —Developers wanting keyless, pay-per-call access to card transaction data
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer micropayment models over subscription billing

Not for

  • —Anyone needing detailed API documentation or response schemas before purchasing
  • —High-volume batch processing where per-request fees add up
  • —Users without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/77/transactions
# Returns 402 with x402 challenge; include X-PAYMENT header with valid payment proof to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/77/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual functionality behind the paywall is entirely opaque — the description 'Premium API Access' is generic and the path '/api/v1/cards/77/transactions' is the only hint at purpose.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all render only 'Connect wallet' with no content
  • —No OpenAPI or request/response schema provided; actual endpoint behavior behind the paywall is unknown
  • —The endpoint path references a specific card ID (77), which may be a demo or placeholder resource
  • —Cannot verify what data or functionality is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:09:38Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/7YPSur
x402-gated card-transactions endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart