x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/120

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific path `/api/v1/transactions/120` is one of many endpoints offered by this provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.

The provider advertises a flat $0.02 per request pricing model with no API keys, no rate limits, and instant access. Payment is settled in USDC (USD Coin) on Base. The x402 challenge confirms the endpoint is live, accepting POST requests with a maximum amount of 20,000 base units of USDC (which equals $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds.

While the landing page lists numerous endpoints across analytics, AI/ML, finance, and utility categories, the specific functionality of `/api/v1/transactions/120` is not documented beyond the generic "Premium API Access" label. No OpenAPI schema, detailed documentation, or example responses were available from the crawled pages (docs, pricing, and API pages all returned only a "Connect wallet" prompt). The actual data returned by this specific transaction endpoint remains unclear.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-method

Use cases

  • —Accessing premium data or transaction information without traditional API key registration
  • —Agent-driven workflows that need instant, permissionless API access via crypto micropayments
  • —Programmatic access to services where per-call billing is preferred over subscriptions

Fit

Best for

  • —Developers wanting no-signup, pay-as-you-go API access
  • —AI agents with x402-compatible payment capabilities
  • —Users who prefer USDC micropayments on Base over traditional billing

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers without access to USDC on the Base network

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/transactions/120 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/120
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via 402 challenge with clear pricing ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example requests/responses, and the specific functionality of this endpoint path is undocumented. The docs/pricing/API pages are all gated behind wallet connection with no useful content.

Warnings

  • —No documentation available — docs, pricing, and API pages all show only 'Connect wallet'
  • —The specific functionality of /api/v1/transactions/120 is not described anywhere in crawled content
  • —No OpenAPI schema or response examples available
  • —Cannot verify what data or service this specific endpoint actually provides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:06:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/ww3Bzm
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart