x402basequality 0.30

Pay-per-call email data 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/77

What it does

This x402-enabled endpoint at `/api/v1/emails/77` 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 probed (`/api/v1/emails/77`) is listed under "Premium API Access" and accepts POST requests. The x402 challenge confirms a max amount of 20,000 base units of USDC (6 decimals), which equals $0.02 per request, consistent with the site's uniform $0.02/request pricing across all endpoints. The payment is directed to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.

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/77` endpoint actually returns. The path suggests it retrieves or processes email-related data for a resource identified by ID 77, but the exact input parameters and output format are unknown.

Capabilities

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

Use cases

  • —Retrieving email-related data on a per-request payment basis
  • —Integrating pay-per-call email lookups into agent workflows
  • —Accessing premium email data without API key management

Fit

Best for

  • —Agents that need keyless, pay-as-you-go API access
  • —Developers wanting to avoid subscription commitments for occasional email data requests
  • —x402-compatible clients on the Base network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume use cases where per-request pricing may add up without bulk discounts
  • —Anyone needing non-USDC or non-Base-network payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/77 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/77
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the emails/77 endpoint actually does. The docs pages are all blank wallet-connect prompts. This is effectively a stub listing.

Warnings

  • —No documentation available — all doc pages render only 'Connect wallet' with no content
  • —No OpenAPI or schema describing request parameters or response format
  • —The purpose of /api/v1/emails/77 is unclear — 'Premium API Access' is a generic label applied to all endpoints
  • —No request or response examples available anywhere in crawled material

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:18:28Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/2kd5SK
Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart