x402basequality 0.25

Pay-per-call email API endpoint on Base via x402, settled in USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/emails/67

What it does

This endpoint at `/api/v1/emails/67` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific endpoint probed here is labeled "Premium API Access" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme.

The x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's uniform $0.02/request pricing across all listed endpoints. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

Documentation is extremely sparse. The /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no explanation of what the `/api/v1/emails/67` endpoint actually does or what input it expects. The endpoint name and path suggest it may return or process email-related data for a resource identified by ID 67, but this is purely speculative. Without documentation or example responses, callers will need to experiment to determine the expected request body and response format.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestemail-apipost-endpoint

Use cases

  • —Retrieving or processing email-related data via a single paid API call
  • —Integrating pay-per-use email functionality into agent workflows without API key management
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —Agents needing keyless, pay-per-call API access
  • —Low-volume or sporadic email data lookups

Not for

  • —Production email sending at scale (no documentation to confirm capabilities)
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Non-crypto users who cannot settle payments in USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/67 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/67
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint does, what inputs it expects, or what it returns. No OpenAPI spec, no examples, and all doc pages are empty. This is effectively a stub listing.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all return only 'Connect wallet' with no content
  • —No OpenAPI or schema describing request/response format for /api/v1/emails/67
  • —Purpose of the endpoint is unclear — 'Premium API Access' is a generic label with no specifics
  • —No examples of request body or response payload available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:20:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/hpzVHc