Pay-per-request API platform on Base via x402 — $0.02/call for data, AI, finance, and utility endpoints.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/orders/82` is described as "Premium API Access" and accepts POST requests, settling payments in USDC (contract 0x8335…2913 on Base) at a maximum cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — each call is paid individually via the X-PAYMENT header.
The broader platform advertises four 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 listed endpoints are priced at $0.02 per request.
The specific endpoint probed (`/api/v1/orders/82`) returned a valid 402 challenge confirming it is live. However, documentation beyond the landing page is essentially empty (all sub-pages just show "Connect wallet"), so the actual request/response schemas for this endpoint and the other advertised APIs are unknown. There is no OpenAPI spec, no example payloads, and no detailed documentation available from the crawl.
Capabilities
Use cases
- —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time financial data like token quotes, exchange rates, and gas estimates on a per-call basis
- —Running data analytics queries and exporting data with per-request billing
- —Using utility services like geocoding, validation, and conversion without subscriptions
Fit
Best for
- —Agents or apps that need low-friction, keyless API access paid per request
- —Developers wanting to avoid subscription commitments for occasional API calls
- —Web3-native workflows that can settle payments in USDC on Base
Not for
- —High-volume use cases where per-request pricing at $0.02 adds up quickly
- —Users who need detailed API documentation, OpenAPI specs, or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/82 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI spec, no request/response schema documentation, and all doc pages are empty stubs showing only 'Connect wallet'. The specific purpose of /api/v1/orders/82 ('Premium API Access') is vague and undocumented. Pricing is clear but everything else must be inferred.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown
- —All documentation pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no actual content
- —The specific endpoint /api/v1/orders/82 has a generic description ('Premium API Access') with no detail on what it actually returns
- —The broader platform advertises many endpoints but none have documented schemas or examples
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/orders/82
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/orders/82
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Four categories of endpoints are advertised: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com
- —Documentation pages return only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs