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/199` 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. No API keys are needed; callers pay per request by attaching an X-PAYMENT header. The challenge specifies a 300-second timeout window.
While the platform lists many endpoints (metrics, reports, sentiment analysis, summarization, embeddings, price feeds, geocoding, etc.), the specific functionality of `/api/v1/accounts/199` is not documented beyond the generic label "Premium API Access." There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. The actual data returned by this endpoint is unknown.
Capabilities
Use cases
- —Accessing premium data or account information via a single paid API call
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Programmatic access to account-level data without subscription commitments
Fit
Best for
- —Developers wanting zero-commitment, per-request API billing
- —AI agents that can settle x402 payments in USDC on Base
- —Users who prefer crypto-native pay-per-use over API key management
Not for
- —Users needing well-documented, schema-validated API contracts
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/199
# Returns 402 with x402 challenge. Attach X-PAYMENT header with signed USDC payment on Base to access.Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/accounts/199 is entirely undocumented. The docs pages render only 'Connect wallet' with no content.
Warnings
- —The specific functionality of /api/v1/accounts/199 is not documented — 'Premium API Access' is a generic label
- —No OpenAPI schema or request/response examples are available
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content
- —The broader platform lists many endpoints but none have detailed documentation visible 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/199
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/accounts/199
- —The platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com