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/customers/34` appears to be a customer-data resource, though the provider's site does not document this particular endpoint in detail. The broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).
The endpoint is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is "exact," meaning each request requires a single micropayment. The provider advertises no API keys, no rate limits, and instant access — you simply attach an X-PAYMENT header with a valid x402 payment proof.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/customers/34` endpoint actually returns. The listing's purpose and output must be inferred from the endpoint path and the generic "Premium API Access" label. Prospective callers should be aware that the exact request body format and response structure are undocumented.
Capabilities
Use cases
- —Fetching customer data records with per-request USDC micropayments
- —Integrating pay-as-you-go API access into agent workflows without API key management
- —Demonstrating x402 payment protocol integration on Base
Fit
Best for
- —Developers experimenting with x402 micropayment protocols
- —Agents that need keyless, pay-per-call API access
- —Projects already operating on the Base L2 network with USDC
Not for
- —Users who need detailed API documentation and response schemas before integrating
- —High-volume use cases where per-request payment overhead is impractical
- —Anyone without a Base-compatible wallet and USDC balance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation for this specific endpoint. The docs pages are empty beyond a wallet-connect prompt. The listing is effectively a stub with confirmed liveness.
Warnings
- —No documentation available for /api/v1/customers/34 — request body format and response schema are unknown
- —All doc/pricing/README pages render only 'Connect wallet' with no content
- —The endpoint path suggests customer-specific data but its exact purpose is unverified
- —No OpenAPI or machine-readable schema provided
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/customers/34
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/customers/34
- —The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com