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/86/transactions

What it does

This endpoint at lowpaymentfee.com exposes a POST-based API at `/api/v1/cards/86/transactions` behind an x402 payment challenge. The site describes itself as offering "Premium API Access" and charges $0.02 per request, settled in USDC on the Base network. The x402 challenge confirms the asset is USD Coin (contract 0x8335…2913 on Base) with a maxAmountRequired of 20000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised; access is granted purely via the x402 payment header.

The specific functionality of this particular endpoint (`/api/v1/cards/86/transactions`) is unclear from the available documentation. The provider's landing page lists many API categories — data & analytics, AI & ML, finance & Web3, and infrastructure utilities — but this specific cards/transactions path does not appear in any of those listed categories. No OpenAPI schema, request/response examples, or detailed documentation were found; the docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further content.

Because the endpoint's actual behavior is undocumented, consumers should treat this as a stub listing. The x402 challenge is live and well-formed, confirming the endpoint is operational at the protocol level, but what data or action it returns upon successful payment is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpost-endpointpay-per-request

Use cases

  • —Fetching card transaction data behind a per-request USDC micropayment
  • —Integrating x402-compatible payment flows into agent workflows
  • —Programmatic access to card-level transaction records

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —Agents that can settle USDC micropayments per call
  • —Use cases needing keyless, pay-per-request API access

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume consumers who need subscription or bulk pricing
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/86/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/86/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint exists and accepts USDC on Base at $0.02/request. However, the specific endpoint path (/api/v1/cards/86/transactions) is not documented anywhere on the site, there is no OpenAPI schema, no request/response examples, and all doc pages are empty. The actual functionality is unknown.

Warnings

  • —The endpoint path /api/v1/cards/86/transactions does not appear in the provider's listed API catalog — its purpose is undocumented.
  • —No OpenAPI schema, request body format, or response examples are available.
  • —All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no usable content.
  • —The description 'Premium API Access' is generic and does not explain what this endpoint does.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:06:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/B6QwtK
x402-gated card-transactions endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart