Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/98`) using the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities.
The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). The x402 challenge was successfully captured, confirming the endpoint is live. No API keys or rate limits are advertised — callers simply attach an x402 payment header to each request.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. The specific functionality of the `/api/v1/emails/98` path — whether it retrieves, validates, or generates email data — is not documented anywhere in the crawled material. The platform's landing page lists many endpoint categories but does not include an emails category, making this endpoint's purpose unclear. Prospective users should test the endpoint directly to determine its output.
Capabilities
Use cases
- —Accessing email-related data on a per-request payment basis without API keys
- —Integrating pay-per-call email data into agent workflows via x402
- —Programmatic access to email resources settled in USDC on Base
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users comfortable with x402 crypto-payment flows on Base
- —Low-volume or sporadic usage where per-request pricing is economical
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume bulk email operations where per-request pricing adds up
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/emails/98 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is effectively no documentation for this specific endpoint. The purpose of /api/v1/emails/98 is undocumented, no request/response schemas are available, and the docs pages are empty. This is essentially a stub listing.
Warnings
- —The specific functionality of /api/v1/emails/98 is completely undocumented — the emails category does not appear on the provider's landing page.
- —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no usable content.
- —No request body schema or response schema is available; callers must experiment to discover the API contract.
- —The hardcoded resource ID '98' in the path suggests this may be a specific record rather than a general-purpose endpoint.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/emails/98
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/emails/98
- —Documentation, API, pricing, and README pages all show only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs