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/messages/108` 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, paid in USDC on the Base network.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02. No API keys or rate limits are advertised; access is instant once payment is included in the `X-PAYMENT` header. The payment timeout is 300 seconds.
Important caveat: the specific functionality of `/api/v1/messages/108` is not documented on the provider's landing page, which lists other endpoint categories (analytics, AI, finance, utilities) but does not mention a "messages" path. There is no OpenAPI spec, no detailed request/response schema, and the crawled docs pages (pricing, README, API) all returned only a "Connect wallet" prompt with no further content. The actual behavior of this particular endpoint is therefore unclear.
Capabilities
Use cases
- —Accessing a pay-per-call API without needing API keys or subscriptions
- —Making programmatic requests settled in USDC on Base L2
- —Agent-driven API consumption with per-request crypto payments
Fit
Best for
- —Developers wanting keyless, 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 who need detailed documentation or guaranteed SLAs before integrating
- —Anyone needing free or fiat-only payment options
- —Use cases requiring well-documented request/response schemas
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/messages/108 \
-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 no documentation for the /messages/108 path specifically, no OpenAPI spec, no request/response schema, and the crawled doc pages are empty. The actual functionality of this endpoint is unknown.
Warnings
- —The /api/v1/messages/108 path is not listed on the provider's landing page; its specific functionality is undocumented.
- —No OpenAPI spec or request/response schema is available.
- —Crawled documentation pages (/api, /pricing, /README) returned no useful content beyond 'Connect wallet'.
- —The provider's catalog lists many endpoints but details on individual endpoint behavior are absent.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/messages/108
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/messages/108
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com