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 resource `/api/v1/accounts/115` 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, paid in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). The response MIME type is `application/json`. However, the specific functionality of the `/api/v1/accounts/115` endpoint is not documented — the platform's landing page lists analytics, AI, finance, and utility endpoints but does not describe an "accounts" resource. There is no OpenAPI spec, no request/response schema, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content.
Because the actual behavior of this particular endpoint is undocumented, agents should treat it as an opaque premium resource. The broader platform advertises geocoding, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, and various utility services — all at the same $0.02/call price point.
Capabilities
Use cases
- —Accessing premium API resources with per-call USDC micropayments
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic account data retrieval via x402 payment flow
Fit
Best for
- —Developers wanting zero-commitment pay-per-use API access
- —AI agents that can settle x402 payments in USDC on Base
- —Projects needing instant API access without signup or rate limits
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —High-volume use cases where per-call pricing may add up versus subscription models
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/115 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific /api/v1/accounts/115 resource is completely undocumented. No OpenAPI spec, no request/response schema, no examples, and all doc pages render only a wallet-connect prompt. The actual functionality of this endpoint is unknown.
Warnings
- —The /api/v1/accounts/115 endpoint is not listed or described anywhere on the platform's landing page — its purpose is unclear.
- —No OpenAPI specification or request/response schema is available.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no useful content.
- —The broader platform lists many endpoints but none match the 'accounts' path — this may be a test or internal resource.
Citations
- —All endpoints priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —Payment in USDC on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02)https://lowpaymentfee.com/api/v1/accounts/115
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/115
- —Platform offers analytics, AI, finance, and utility API categorieshttps://lowpaymentfee.com