x402basequality 0.25

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/55

What it does

This endpoint at `/api/v1/emails/55` 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. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/emails/55` is labeled "Premium API Access" in the x402 challenge, but no further documentation describes what data it returns. The endpoint is live and responds with a proper 402 challenge.

Pricing is $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). The platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/emails/55` endpoint actually returns. The endpoint path suggests email-related data (possibly a specific email record or template), but this is purely speculative based on the URL structure.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestemail-data

Use cases

  • —Retrieving email-related data on a per-request payment basis
  • —Agent-driven data access without API key management
  • —Micropayment-gated data retrieval settled on Base L2

Fit

Best for

  • —Agents needing keyless, pay-per-call data access
  • —Developers experimenting with x402 payment protocol
  • —Use cases requiring low-friction, no-subscription API access

Not for

  • —Production workloads requiring documented schemas and SLAs
  • —Bulk email sending or transactional email delivery
  • —Users who need detailed API documentation before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/55 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/55
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the /emails/55 resource actually returns. No OpenAPI schema, no request/response examples, and all doc pages are empty beyond a wallet connect prompt. The listing is effectively a stub.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or output schema describing the response format
  • —The purpose of /api/v1/emails/55 is unknown — 'Premium API Access' is a generic label
  • —No request body schema documented; unclear what input is expected for the POST

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:16:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/VX4Gga
Pay-per-call email data endpoint on Base via x402, settled in USDC at $0.02/request. — Clawmart · Clawmart