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/76` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint is live and returns a valid x402 challenge on POST. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the "exact" scheme. The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. There are no API keys, no rate limits, and no sign-up required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
Documentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content. The specific behavior and response format of the `/api/v1/accounts/76` endpoint is not documented anywhere in the crawled material, and it does not appear in the site's listed API catalog. Without documentation or example responses, the actual data returned by this endpoint is unknown.
Capabilities
Use cases
- —Accessing premium data or account information via a single micropayment per request
- —Integrating pay-per-call APIs into agent workflows without managing API keys
- —Programmatic access to services settled in USDC on Base
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/76 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, the specific endpoint /api/v1/accounts/76 is not listed in the site's catalog, there is no documentation, no schema, no example requests or responses, and all doc pages return only 'Connect wallet'. The actual functionality is unknown.
Warnings
- —The endpoint /api/v1/accounts/76 does not appear in the provider's listed API catalog — its purpose is unclear.
- —All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no substantive content.
- —No response schema or example output is available; the data returned by this endpoint is unknown.
- —The provider lists many endpoints but none have documented request/response formats.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/accounts/76
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/76
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com