x402basequality 0.30

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/45

What it does

This endpoint at `/api/v1/emails/45` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. Each call is paid via the x402 protocol using USDC on the Base network, with no API keys, rate limits, or subscriptions required.

The specific endpoint probed (`/api/v1/emails/45`) is labeled "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network, with a timeout of 300 seconds.

Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/emails/45` endpoint actually returns or what input it expects. The endpoint is live (returns a valid 402 challenge), but the exact functionality behind the email resource is unknown from the available material.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyemail-api

Use cases

  • —Fetching or sending email data on a per-request payment basis
  • —Integrating a no-signup, no-API-key email endpoint into agent workflows
  • —Making micropayment-settled API calls from autonomous agents on Base

Fit

Best for

  • —Agents needing a zero-friction, keyless email API
  • —Developers who want to pay per call with USDC on Base
  • —Workflows requiring no subscription or rate-limit constraints

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume email operations where per-call pricing at $0.02 adds up quickly
  • —Anyone who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/45 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/45
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network details. However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a wallet-connect prompt. The actual functionality of the /api/v1/emails/45 resource is entirely unknown, making this effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or input/output schema provided for this endpoint
  • —The exact purpose and behavior of /api/v1/emails/45 is unknown from available material
  • —The endpoint path suggests a specific email resource (ID 45) but no context is given

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:03:37Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/ZbH6Sh
Pay-per-call email API endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart