x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource `/api/v1/trades/165` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.
The endpoint accepts POST requests and returns JSON. Payment is settled on-chain via USDC (contract 0x8335…2913) on Base, using the x402 "exact" scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific functionality behind `/api/v1/trades/165` is not documented beyond the generic label "Premium API Access." The broader site lists categories like metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — but this particular trades endpoint does not appear in the site's public catalog. Without further documentation or example responses, the exact data returned by this endpoint remains unclear.
Capabilities
Use cases
- —Fetching trade-related data with per-request USDC micropayments
- —Integrating pay-as-you-go API access into agent workflows without managing API keys
- —Programmatic access to premium data endpoints settled on Base L2
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users already holding USDC on Base who want frictionless micropayments
- —Scenarios requiring no subscription commitment or rate-limit negotiation
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/165 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, the specific /trades/165 endpoint is not listed in the site's public catalog, there is no OpenAPI schema, no request/response examples, and the docs/pricing/README pages all render only a 'Connect wallet' prompt with no useful content. The actual functionality is unknown.
Warnings
- —The /api/v1/trades/165 endpoint is not listed in the site's public API catalog — its specific purpose is undocumented.
- —No OpenAPI spec, request schema, or response examples are available.
- —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no substantive content.
- —The exact data returned by this endpoint is unknown; 'Premium API Access' is a generic label.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, requiring 20000 base units of USDChttps://lowpaymentfee.com/api/v1/trades/165
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/165
- —Site advertises $0.02 per request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com