Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/wire/142` is listed as "Premium API Access" and accepts POST requests with x402 payment of up to 20,000 base units of USDC (i.e., $0.02 per call, since USDC uses 6 decimals). No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The broader platform advertises four endpoint categories: 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 share the same $0.02/request pricing. However, the specific endpoint probed here (`/api/v1/wire/142`) does not clearly map to any of those named categories — its description is simply "Premium API Access" with no further documentation on what data or functionality it returns.
The site's documentation, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content, so there is no detailed API documentation, request/response schemas, or usage examples available. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation about what this particular wire endpoint actually does is a significant gap.
Capabilities
Use cases
- —Programmatic access to paid API endpoints without traditional API key registration
- —Agent-driven workflows that need instant, keyless API access settled on-chain
- —Integrating pay-per-use data or utility services into applications via x402 protocol
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost per-request pricing without subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring non-crypto payment methods
- —High-volume use cases where per-request pricing may not be economical
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/142 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation, no request/response schema, and no explanation of what /api/v1/wire/142 actually returns. The docs, pricing, and README pages are all empty (just 'Connect wallet'). This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.
- —The endpoint path /api/v1/wire/142 does not match any of the named API categories on the homepage; its actual functionality is unknown.
- —No request or response schema is provided; callers cannot know what to send or what to expect back.
- —Output schema only specifies HTTP POST method with no body or response details.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/wire/142
- —All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/wire/142