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/69` 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 (USD Coin) at a cost of $0.02 per request. The platform requires no API keys, no rate limits, and no upfront commitments — payment is handled inline via the x402 protocol's `X-PAYMENT` header.
The specific endpoint probed (`/api/v1/emails/69`) is listed under the title "Premium API Access" but its exact functionality is not documented in the crawled material. The site's landing page does not list an emails category among its publicly advertised API groups (Data & Analytics, AI & ML, Finance & Web3, Infrastructure), so the precise data returned by this endpoint is unclear. The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (6 decimals → $0.02) per call on the Base network.
The broader lowpaymentfee.com platform advertises uniform $0.02 pricing across all endpoints with no minimums or commitments. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a "Connect wallet" prompt with no substantive content, so detailed request/response schemas are unavailable.
Capabilities
Use cases
- —Retrieving email-related data on a per-request payment basis
- —Agent-driven workflows that need email data without managing API keys
- —Programmatic access to email records with crypto micropayments
Fit
Best for
- —Developers wanting keyless, pay-as-you-go email data access
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —High-volume bulk email operations where per-call pricing is expensive
- —Users who need detailed API documentation and response schemas before integrating
- —Anyone unable to pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/69 \
-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 of what this email endpoint actually returns, no request/response schema, and the docs pages are empty. The endpoint's purpose must be entirely inferred from its URL path.
Warnings
- —The /api/v1/emails/69 endpoint is not listed among the publicly advertised API categories on the landing page — its exact functionality is unknown.
- —All documentation pages (/docs, /pricing, /README) returned only a 'Connect wallet' prompt with no substantive content.
- —No request or response schema is available; the output of this endpoint cannot be verified without making a paid call.
- —The 'email' category and the resource ID '69' suggest this may return a specific email record, but this is speculative.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/emails/69
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/emails/69
- —Documentation pages return only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs