Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. Each call costs $0.02 in USDC (USD Coin) with no API keys, no rate limits, and no subscriptions required. The specific endpoint at `/api/v1/wire/48` is listed as "Premium API Access" and accepts POST requests settled in USDC on Base.
The platform advertises four broad categories of endpoints: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints appear to follow the same $0.02 per-request pricing model.
However, the `/api/v1/wire/48` endpoint's x402 challenge shows a `maxAmountRequired` of 20000 base units of USDC (6 decimals), which equals $0.02 — consistent with the advertised pricing. The endpoint accepts payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). Documentation beyond the landing page is essentially empty (all sub-pages just show "Connect wallet"), so the actual request/response schema for this specific endpoint is unknown.
Capabilities
Use cases
- —Paying per-call for API access without managing API keys or subscriptions
- —Integrating x402-compatible agents with a low-cost utility API
- —Accessing data, AI, finance, or infrastructure endpoints with USDC micropayments
Fit
Best for
- —Agents or developers wanting zero-commitment, pay-as-you-go API access
- —x402-native workflows on the Base network
- —Low-cost micropayment API experimentation
Not for
- —Users who need detailed API documentation or OpenAPI schemas before integrating
- —High-throughput production workloads where per-request pricing may add up
- —Users without USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/48 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of `/api/v1/wire/48` specifically (as opposed to the other listed endpoints) is entirely unclear. The docs, pricing, API, and README pages all render only 'Connect wallet' with no useful content.
Warnings
- —No documentation available — all doc pages render only 'Connect wallet'
- —The specific purpose and expected input/output of /api/v1/wire/48 is unknown
- —No OpenAPI or schema definition provided
- —The endpoint path 'wire/48' does not match any of the advertised API categories on the landing page
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/48
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/48
- —Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categorieshttps://lowpaymentfee.com