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/114` 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 settled in USDC on the Base network.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The timeout is 300 seconds. No API keys or rate limits are advertised; access is instant upon payment.
However, the specific functionality of `/api/v1/messages/114` is unclear. The provider's landing page lists many endpoint categories but does not include a `/messages/` path among them, and no documentation, OpenAPI spec, or request/response schema is available for this particular resource. The description field in the x402 challenge simply says "Premium API Access" without further detail. Prospective callers should be aware that the exact input format and response payload for this endpoint are undocumented.
Capabilities
Use cases
- —Accessing a premium messages resource with per-call USDC micropayments
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to web services on Base
Fit
Best for
- —Agents or scripts that need keyless, pay-per-call API access
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume callers who want no subscription commitments
Not for
- —Users who need detailed documentation or guaranteed SLAs before calling
- —High-volume batch processing where per-call pricing adds up
- —Anyone who needs to understand the exact response schema before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/messages/114 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/messages/114 is entirely undocumented — no OpenAPI spec, no request/response schema, no description beyond the generic 'Premium API Access' label. The /messages/ path does not appear in the provider's own catalog. This is effectively a stub listing.
Warnings
- —The /api/v1/messages/114 path is not listed among the provider's advertised endpoints — its purpose is unknown.
- —No OpenAPI spec, request schema, or response schema is available for this endpoint.
- —No documentation pages rendered meaningful content (pricing, README, and /api pages only showed 'Connect wallet').
- —The exact nature of the 'messages' resource is unclear — callers pay before knowing what they receive.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/messages/114
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The provider lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories but does not list a /messages/ path.https://lowpaymentfee.com