Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/accounts/167` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The endpoint is live and returns a valid x402 challenge on POST. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the "exact" scheme. The maximum amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. There are no API keys, no rate limits, and no signup required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The platform's landing page lists additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and more, all at the same $0.02 price point. However, the specific functionality behind `/api/v1/accounts/167` is not documented beyond the generic label "Premium API Access." No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Accessing premium API data without signup or API key management
- —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
- —Programmatic access to account-level data at micro-transaction pricing
Fit
Best for
- —Developers wanting zero-friction, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone requiring non-crypto (fiat) payment methods
- —High-volume consumers who would benefit from bulk pricing or subscriptions
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/167 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/accounts/167 is entirely unclear beyond the generic 'Premium API Access' label. Docs pages returned only 'Connect wallet' with no content.
Warnings
- —The specific functionality of /api/v1/accounts/167 is undocumented — 'Premium API Access' is the only description available.
- —No OpenAPI schema, request body schema, or response examples were found.
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.
- —The platform lists many endpoints but none have detailed documentation in the crawl.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/167
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/accounts/167
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Platform lists endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilitieshttps://lowpaymentfee.com