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/25/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST-based card transactions API at `/api/v1/cards/25/transactions`. It is part of a broader platform offering dozens of x402-gated endpoints 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 (`/api/v1/cards/25/transactions`) is labeled "Premium API Access" but its exact functionality is unclear from the available documentation. The path suggests it may relate to retrieving or creating transactions for a specific card (ID 25), but no request/response schema or detailed docs were found. The platform's crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no further content.

Payment is handled via the x402 protocol: callers receive a 402 challenge specifying USDC (contract `0x8335…2913`) on Base with a `maxAmountRequired` of 20000 base units, which equals $0.02 (USDC uses 6 decimals). The scheme is "exact", meaning the full amount is paid per request. No API keys or rate limits are advertised. The endpoint is live and responding with a valid x402 challenge.

Capabilities

x402-paymentusdc-settlementbase-networkcard-transactionspost-apipay-per-request

Use cases

  • —Querying or creating card transaction records via a pay-per-call model
  • —Integrating card transaction data into automated agent workflows without API key management
  • —Testing x402 payment protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers exploring x402 protocol-based API access
  • —Agents needing keyless, pay-per-request card transaction data
  • —Low-volume or sporadic API consumers who want no subscription commitment

Not for

  • —High-volume production workloads requiring documented SLAs and detailed schemas
  • —Users who need comprehensive card processing features (issuing, disputes, chargebacks)
  • —Anyone requiring fiat-only payment rails with no crypto involvement

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/25/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/25/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no explanation of what the card transactions endpoint actually does. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No request or response schema available — the endpoint's exact functionality is unknown.
  • —All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no useful content.
  • —The path '/api/v1/cards/25/transactions' with a hardcoded card ID (25) is unusual and unexplained.
  • —The 'Premium API Access' label is generic and does not describe the endpoint's purpose.
  • —This endpoint is not listed among the platform's advertised APIs on the homepage.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 02:51:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/h7yPnc
x402-gated card-transactions endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart