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/29

What it does

This endpoint at `/api/v1/emails/29` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance, and infrastructure categories. The specific endpoint probed here is labeled "Premium API Access" and accepts POST requests, returning JSON. Payment is handled via the x402 protocol on the Base network using USDC (contract `0x8335...2913`), with a maximum charge of 20,000 base units — equivalent to $0.02 per request (USDC uses 6 decimals).

The broader platform advertises a uniform $0.02/request pricing model across all endpoints, with no API keys, no rate limits, no minimums, and instant access. However, the specific functionality of the `/api/v1/emails/29` endpoint is unclear — the path suggests it retrieves or processes email-related data for a resource identified as ID 29, but no documentation, request schema, or response schema is available. The docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no substantive content.

Because there is no OpenAPI spec, no request/response examples, and no documentation describing what this endpoint actually does or what input it expects, agents should treat this as a low-documentation endpoint. The x402 challenge is live and well-formed, confirming the endpoint is operational and ready to accept payments.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseemail-data

Use cases

  • —Retrieving email-related data on a per-request payment basis
  • —Programmatic access to email records without API key management
  • —Agent-driven email data lookups settled in USDC on Base

Fit

Best for

  • —Agents needing keyless, pay-per-call email data access
  • —Developers who want to avoid subscription commitments for occasional email lookups
  • —x402-compatible clients on the Base network

Not for

  • —Users needing well-documented APIs with clear request/response schemas
  • —High-volume email processing where per-request pricing is inefficient
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/29 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/29
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint is operational with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the endpoint actually returns. The docs pages are all empty 'Connect wallet' stubs. This is effectively a stub listing.

Warnings

  • —No documentation available — all doc pages return only 'Connect wallet' with no content
  • —No request or response schema provided; unclear what input the POST endpoint expects
  • —The specific functionality of /api/v1/emails/29 is unknown — 'Premium API Access' is a generic label
  • —No OpenAPI spec or AI plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:05:56Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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