Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API marketplace that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The x402 payment protocol allows agents and clients to pay per call by attaching a cryptographic payment header to each HTTP request.
The specific endpoint at `/api/v1/wire/164` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/wire/164` endpoint actually returns. The site's landing page lists many endpoint categories (analytics, AI, finance, utilities) but does not clarify which specific service this wire/164 endpoint maps to. Without documentation or example payloads, the actual functionality behind this endpoint remains unknown.
Capabilities
Use cases
- —Agent-driven API consumption with automatic per-call USDC payments
- —Accessing premium data or AI services without managing API keys or subscriptions
- —Programmatic pay-as-you-go access to utility endpoints on Base
Fit
Best for
- —Developers or agents who want keyless, pay-per-request API access
- —x402-compatible clients settling in USDC on Base
- —Low-commitment, no-subscription API consumption
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume use cases where $0.02/request adds up and bulk pricing is preferred
- —Users without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/164 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'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 documentation, no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does beyond the generic label 'Premium API Access'. The docs/pricing/README pages are all blank wallet-connect stubs.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —The specific functionality of /api/v1/wire/164 is unknown; 'Premium API Access' is a generic label.
- —No OpenAPI schema or request/response examples are provided anywhere.
- —No information about uptime, SLAs, or rate limits beyond the marketing claim of 'no rate limits'.
Citations
- —All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02https://lowpaymentfee.com/api/v1/wire/164
- —Site lists endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com