x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource `/api/v1/accounts/155` 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, settled in USDC (USD Coin) on Base.
The x402 challenge confirms the endpoint is live and accepts exact-scheme payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The `maxAmountRequired` is 20000 base units, which at 6 decimals equals $0.02. The endpoint accepts POST requests and returns `application/json`. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header.
However, the specific functionality behind `/api/v1/accounts/155` is unclear. The provider's landing page lists many API categories but does not document this particular accounts endpoint. There is no OpenAPI spec, no request/response schema documentation, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. Without knowing what data or service this endpoint returns, callers should treat it as an opaque premium resource until further documentation is available.
Capabilities
Use cases
- —Programmatic access to a premium API resource with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API consumption on Base
- —Exploring x402 payment protocol integrations with minimal commitment
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that can settle USDC payments on Base automatically
- —Users who want no-subscription, no-API-key access to premium endpoints
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone without a Base-compatible USDC wallet or x402-capable client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/155 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/accounts/155 is entirely undocumented. No OpenAPI spec, no request/response schemas, and all doc pages render only a wallet-connect prompt. The listing is effectively a stub with confirmed liveness.
Warnings
- —The specific purpose and response format of /api/v1/accounts/155 is undocumented — it is unclear what data or service this endpoint provides.
- —No OpenAPI specification or request/response schema is available.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.
- —The 'accounts/155' path suggests a resource-specific endpoint but no context is given for what 'account 155' represents.
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/155
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/155
- —Provider lists categories: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructurehttps://lowpaymentfee.com