x402basequality 0.30

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/accounts/55

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/accounts/55` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.

The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain using USDC (contract `0x8335...2913` on Base) to address `0x1A2B...85F3`. The `maxAmountRequired` of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). The provider's landing page lists 16 distinct API endpoints across four categories, all at the same $0.02 price point.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/accounts/55` endpoint actually returns. The endpoint name "Premium API Access" is generic and does not clarify its function. Without documentation, callers must discover behavior experimentally.

Capabilities

x402-paymentusdc-basepay-per-requestpost-methodno-api-keyno-rate-limit

Use cases

  • —Programmatic access to premium API endpoints without signup or API keys
  • —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
  • —Exploring pay-per-request API patterns using the x402 protocol

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents that can settle USDC payments on Base automatically
  • —Users who want zero-commitment, no-signup API access

Not for

  • —Anyone needing detailed documentation or guaranteed SLAs before integrating
  • —Use cases requiring free or high-volume bulk access at lower per-call cost
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/accounts/55 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/accounts/55
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of /api/v1/accounts/55 is entirely unclear. The docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages are all empty beyond a 'Connect wallet' prompt
  • —No OpenAPI or schema describing request parameters or response format for /api/v1/accounts/55
  • —The endpoint name 'Premium API Access' is generic and does not describe what data or service is returned
  • —Purpose of the specific resource /api/v1/accounts/55 is unknown — could be account data, could be a placeholder

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 00:35:28Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/Y78n36
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart