x402basequality 0.30

Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/168

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/transactions/168` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, which is 6 decimals = $0.02) to wallet 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The timeout for payment settlement is 300 seconds.

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 spec, no request/response schema documentation, and no description of what the `/api/v1/transactions/168` endpoint specifically returns. The platform advertises many endpoints but provides no public documentation on input parameters or response formats for any of them.

Capabilities

x402-paymentusdc-base-networkpay-per-requestjson-responsepost-method

Use cases

  • —Accessing premium data or transaction information without API key registration
  • —Programmatic pay-per-call access for agents or bots on Base network
  • —Testing x402 protocol integrations with low-cost endpoints

Fit

Best for

  • —Developers wanting zero-signup API access via crypto micropayments
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer pay-per-use over subscription models

Not for

  • —Users who need detailed API documentation before integrating
  • —Applications requiring high-throughput with predictable monthly billing
  • —Users without access to USDC on Base network

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/transactions/168 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/168
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via 402 challenge with clear pricing ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually does, what inputs it accepts, or what it returns. No OpenAPI spec, no examples, no request/response schemas available.

Warnings

  • —No documentation available — docs/API/pricing/README pages all show only 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —Purpose of /api/v1/transactions/168 is unclear — 'Premium API Access' is generic
  • —Cannot verify what data or service is actually delivered after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:23:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/kUtVFF
Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC. — Clawmart · Clawmart