Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. The specific endpoint `/api/v1/wire/5` is listed under the provider's umbrella but its exact function is not documented beyond the generic label "Premium API Access."
The endpoint is live and returns a valid x402 402 challenge. It accepts payment in USDC on the Base network at a maximum cost of 20,000 base units (0.02 USDC, i.e., $0.02 per request). Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header. The provider advertises uniform $0.02/request pricing across all its endpoints, with no minimums or commitments.
The broader lowpaymentfee.com platform offers endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, documentation beyond the landing page is essentially empty (all doc/pricing/API pages only show a "Connect wallet" prompt), so the actual behavior, input parameters, and response schemas for this specific endpoint are unknown.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API consumption on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 micropayment flows
- —AI agents that need frictionless pay-per-call API access without API key management
- —Users who want low-cost ($0.02) per-request pricing with no commitments
Not for
- —Users who need detailed API documentation or well-defined input/output schemas before integrating
- —Anyone requiring non-crypto (fiat) payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/5 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no input/output examples, and the specific function of /api/v1/wire/5 is completely undocumented. All secondary pages return only 'Connect wallet' with no content. This is effectively a stub listing.
Warnings
- —The specific purpose and functionality of /api/v1/wire/5 is undocumented — 'Premium API Access' is a generic label with no further detail.
- —All documentation, pricing, API, and README pages are empty (only show 'Connect wallet'), so there is no way to verify what this endpoint actually does.
- —No input parameters or response schema are available; integration requires trial-and-error or contacting the provider.
- —The provider lists many endpoints across diverse categories but none have public documentation.
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/wire/5
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and no commitmentshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/wire/5
- —Documentation, pricing, API, and README pages only display 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs