Pay-per-call premium API access on Base via x402 protocol at $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equals $0.02 per request. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific endpoint `/api/v1/accounts/126` is listed under the provider's umbrella of services but its exact functionality is not documented beyond the label "Premium API Access." The broader platform offers endpoints spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation), all priced uniformly at $0.02 per call.
The endpoint is live and returns a proper 402 challenge with x402 version 1. Payment settles on Base to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum timeout for payment verification is 300 seconds. No OpenAPI schema, detailed documentation, or example responses are available for this specific endpoint.
Capabilities
Use cases
- —Accessing premium API resources without subscription or API key management
- —Programmatic pay-per-use access for agents or automated workflows
- —Testing x402 payment protocol integrations
Fit
Best for
- —Developers wanting zero-commitment pay-per-call API access
- —AI agents that can settle payments on Base via x402
- —Users who prefer crypto micropayments over traditional billing
Not for
- —Users needing detailed documentation or guaranteed SLAs
- —High-volume use cases where per-request pricing is inefficient
- —Users without access to USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/accounts/126 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no example request/response, and the specific functionality of /api/v1/accounts/126 is unclear beyond the generic label 'Premium API Access'. The crawled docs/pricing/README pages all just show 'Connect wallet' with no useful content.
Warnings
- —No documentation available for this specific endpoint beyond the label 'Premium API Access'
- —No OpenAPI or schema describing request parameters or response format
- —The exact functionality of /api/v1/accounts/126 is unknown — it does not appear in the provider's listed API catalog
- —Docs, pricing, and README pages return only 'Connect wallet' with no substantive content
Citations
- —Endpoint returns 402 with x402 version 1 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/accounts/126
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/accounts/126