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/122` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). The platform advertises a broad suite of sibling endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — all at the same per-request price.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/accounts/122` endpoint actually returns. The endpoint's specific functionality (what "accounts/122" provides) is not described anywhere in the crawled material. Agents should be aware that the actual behavior of this particular endpoint is unclear beyond its generic "Premium API Access" label.
Capabilities
Use cases
- —Accessing premium API data with per-request USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to various data and utility endpoints
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users who prefer crypto micropayments over subscription billing
- —Quick prototyping without signup or rate-limit concerns
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto payment methods
- —High-volume consumers who would benefit from bulk pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/122 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response examples, and the specific purpose of /api/v1/accounts/122 is entirely undocumented. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The specific functionality of /api/v1/accounts/122 is not documented anywhere in the crawl material
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content
- —No OpenAPI spec, request schema, or response schema available
- —No examples of expected input or output for this endpoint
Citations
- —All endpoints priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —Payment in USDC on Base network, maxAmountRequired 20000 base units (=$0.02)https://lowpaymentfee.com/api/v1/accounts/122
- —Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com