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/90` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint accepts POST requests and returns application/json responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-payment scheme. The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys or rate limits are advertised; access is gated purely by the x402 payment header.
The specific functionality behind `/api/v1/accounts/90` is not documented beyond the label "Premium API Access." The provider's landing page lists other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, etc.) but does not describe what the accounts endpoint returns. There is no OpenAPI spec, no request/response schema documentation, and the docs/pricing/README pages all render only a "Connect wallet" prompt with no additional content.
Capabilities
Use cases
- —Accessing a pay-per-call API without needing API keys or subscriptions
- —Programmatic account data retrieval gated by micropayment
- —Agent-driven API consumption using x402 payment protocol
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments on Base in USDC
- —Users who prefer per-request billing over monthly subscriptions
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone without a Base-compatible USDC wallet
- —High-volume consumers who need bulk pricing or rate guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/90 \
-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 there is zero documentation on what the /api/v1/accounts/90 endpoint actually returns. No OpenAPI spec, no request/response schemas, and all doc pages render only a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —No documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content
- —The specific functionality of /api/v1/accounts/90 is undocumented; 'Premium API Access' is the only description
- —No OpenAPI spec or request/response schema provided
- —No example responses available to verify what data is returned
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/90
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com