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 resource at `/api/v1/accounts/116` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is handled inline via the X-PAYMENT header with no API keys or account registration required.
The broader lowpaymentfee.com platform advertises a suite of endpoints spanning 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 priced at $0.02 per request. However, this specific listing covers only the `/api/v1/accounts/116` endpoint, whose exact functionality beyond "Premium API Access" is not documented.
The endpoint is live and returns a valid x402 challenge (HTTP 402) with a 300-second payment timeout. No OpenAPI schema, detailed documentation, or example responses were found in the crawl. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional technical content. Because the actual response payload and input parameters for this particular endpoint are undocumented, agents should treat this as a minimally-documented but functional x402 endpoint.
Capabilities
Use cases
- —Accessing a pay-per-call API without needing to register or manage API keys
- —Making programmatic requests settled instantly in USDC on Base
- —Agent-driven API consumption with inline crypto payment
Fit
Best for
- —Developers wanting zero-friction API access with no signup
- —AI agents that can settle x402 payments autonomously
- —Users who prefer per-request pricing over subscriptions
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone without a Base-compatible USDC wallet
- —High-volume use cases where per-request pricing may add up
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/116 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality of /api/v1/accounts/116 is completely opaque beyond the label 'Premium API Access'. The docs pages are empty stubs.
Warnings
- —No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no technical content
- —The specific purpose and response format of /api/v1/accounts/116 is undocumented
- —No OpenAPI or input/output schema provided beyond the minimal outputSchema in the x402 challenge
- —The broader platform lists many endpoints but none have documented schemas or examples
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/accounts/116
- —maxAmountRequired is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02https://lowpaymentfee.com/api/v1/accounts/116
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Docs, pricing, and API pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs