Pay-per-request email data endpoint on Base via x402, settled in USDC at $0.02/call.
What it does
This x402-enabled endpoint at `/api/v1/emails/38` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. Each call is settled on the Base network using USDC (contract 0x8335…2913) with no API keys, no rate limits, and no subscriptions required — just an x402 payment header per request.
The specific endpoint `/api/v1/emails/38` is listed under "Premium API Access" but its exact functionality is not well-documented. The path suggests it returns or processes email-related data for a resource identified by ID 38. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The broader lowpaymentfee.com platform advertises uniform $0.02 pricing across all endpoints, with categories including analytics/metrics, AI sentiment analysis, text summarization, classification, embeddings, finance/price feeds, exchange rates, crypto gas estimates, geocoding, validation, conversion, and generation utilities. Documentation pages exist but appear to require wallet connection and contain no visible content.
Capabilities
Use cases
- —Retrieving email-related data on a per-request payment basis without API key management
- —Integrating pay-as-you-go email data into agent workflows using x402 protocol
- —Accessing premium email information settled via USDC on Base L2
Fit
Best for
- —Agents or developers wanting keyless, pay-per-call email data access
- —Workflows that need on-chain payment settlement for API calls
- —Users who prefer no subscriptions or rate limits
Not for
- —Bulk email operations requiring thousands of calls at volume discounts
- —Users who need detailed API documentation before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/38 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation on what the /emails/38 endpoint actually returns, no request/response schema, and the docs pages are empty (wallet-gated). The exact purpose of this specific endpoint is unclear.
Warnings
- —No documentation available — all doc pages require wallet connection and show no content
- —The exact functionality of /api/v1/emails/38 is unknown; the path and description provide no detail beyond 'Premium API Access'
- —No request body schema or response schema documented
- —No examples of successful responses available
Citations
- —The endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/emails/38
- —Uniform pricing of $0.02 per request across all endpoints, no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/emails/38
- —Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeouthttps://lowpaymentfee.com/api/v1/emails/38