Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at `/api/v1/emails/95` 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/95` is listed under "Premium API Access" but its exact functionality is not well-documented. Based on the URL pattern it likely returns or processes email-related data for a resource identified by ID 95. 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. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
The broader lowpaymentfee.com platform advertises uniform $0.02/request pricing across all endpoints, with categories including sentiment analysis, text summarization, embeddings, price feeds, geocoding, and more. Documentation beyond the landing page is essentially empty (pages show only "Connect wallet"), so the request/response schemas for this specific endpoint are unknown.
Capabilities
Use cases
- —Retrieving email-related data on a per-request payment basis without needing an API key
- —Integrating pay-as-you-go email data into agent workflows via x402 protocol
- —Accessing premium email content or metadata settled instantly on Base L2
Fit
Best for
- —Agents needing one-off email data lookups without subscription overhead
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume or sporadic email data access at $0.02 per call
Not for
- —High-volume email processing where per-call costs add up quickly
- —Use cases requiring detailed API documentation or guaranteed SLAs
- —Users who need email sending/SMTP functionality (this appears to be data retrieval only)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/95 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the endpoint's actual functionality is undocumented. No request/response schema, no docs beyond a landing page, and the purpose of '/api/v1/emails/95' is only guessable from the URL path. Effectively a stub listing.
Warnings
- —Endpoint purpose is unclear — 'Premium API Access' is a generic label with no specifics about what email data is returned
- —All documentation pages (docs, api, pricing, README) render only 'Connect wallet' with no actual content
- —No request body schema or response schema available
- —No OpenAPI spec or AI plugin manifest found
- —The emails/95 path suggests a fixed resource ID; it is unclear if other IDs are available or what the data represents
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/emails/95
- —Platform advertises $0.02/request pricing 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/emails/95
- —maxAmountRequired is 20000 base units (6 decimals = $0.02)https://lowpaymentfee.com/api/v1/emails/95