Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/accounts/140` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to wallet address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The response MIME type is application/json. The platform advertises instant access with no signup friction — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
However, the specific functionality of the `/api/v1/accounts/140` path is unclear. It does not appear in the site's listed API catalog (which covers analytics, AI, finance, and utility endpoints). There is no OpenAPI schema, no request/response documentation, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. The endpoint's actual behavior — what data it returns or what input it expects — cannot be determined from available materials.
Capabilities
Use cases
- —Accessing premium API data without traditional API key signup
- —Making one-off paid API calls settled in USDC on Base
- —Agent-driven programmatic access to paid endpoints via x402 protocol
Fit
Best for
- —Developers who want frictionless pay-per-use API access without accounts
- —AI agents that can settle x402 payments autonomously
- —Users already holding USDC on the Base network
Not for
- —Users needing detailed API documentation before integrating
- —Anyone without USDC on the Base network
- —High-volume consumers who need bulk pricing or rate guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/140 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific path, no OpenAPI schema, no request/response examples, and the docs pages are empty. The actual functionality of /api/v1/accounts/140 is unknown.
Warnings
- —The specific endpoint /api/v1/accounts/140 is not listed in the site's public API catalog — its purpose is unclear.
- —No OpenAPI schema or request/response documentation is available.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no substantive content.
- —The actual data returned by this endpoint cannot be determined from available materials.
Citations
- —The endpoint returns a 402 challenge requiring up to 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/140
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/140
- —The platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com