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/69/transactions

What it does

This endpoint at lowpaymentfee.com provides access to a card transactions resource at `/api/v1/cards/69/transactions` via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments on the Base network.

The specific endpoint is labeled "Premium API Access" and accepts HTTP POST requests. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base using the x402 "exact" scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. No API keys are needed; callers authenticate purely via the X-PAYMENT header containing a valid x402 payment proof. The platform advertises no rate limits and instant access.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/cards/69/transactions` endpoint actually returns or what input it expects beyond being a POST endpoint. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the lack of documentation makes it difficult to determine the actual functionality or expected request body format.

Capabilities

x402-paymentusdc-settlementbase-networkhttp-postcard-transactionsmicropayment-apino-api-key

Use cases

  • —Retrieving card transaction data via pay-per-request micropayments
  • —Integrating x402-gated financial data into agent workflows
  • —Accessing card transaction records without traditional API key management

Fit

Best for

  • —Developers experimenting with x402 payment protocol integrations
  • —Agents that need on-demand card transaction data with no subscription commitment
  • —Low-volume consumers who prefer per-call USDC micropayments over monthly plans

Not for

  • —Users who need detailed API documentation or request/response schemas before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans
  • —Developers who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/69/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/69/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live with a valid x402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint actually does or accepts. The docs pages all render only 'Connect wallet'. The listing is essentially a stub.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided; the expected POST body and response format are unknown
  • —The purpose of '/api/v1/cards/69/transactions' is unclear — 'Premium API Access' is a generic label
  • —The platform lists many diverse API categories but provides no evidence of actual functionality behind any of them

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:05:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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