x402basequality 0.25

Retrieve email attachments via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/emails/3/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically for email ID 3) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled in USDC on the Base network using the x402 "exact" scheme, with a maximum cost of $0.02 per request (20,000 base units of USDC with 6 decimals).

The provider lowpaymentfee.com hosts a broad suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, this specific endpoint (`/api/v1/emails/3/attachments`) is not listed on the provider's landing page among the advertised API categories, so its exact functionality and response schema are unclear. The endpoint is live and returning a valid x402 402 challenge.

Documentation beyond the landing page is essentially empty (all doc/pricing/API pages only show a "Connect wallet" prompt), so the request body format, expected parameters, and response structure for this endpoint are unknown. Use with caution until more documentation becomes available.

Capabilities

x402-paymentusdc-baseemail-attachmentspay-per-requestjson-response

Use cases

  • —Programmatically retrieving email attachments behind a paywall
  • —Agent-driven email data extraction with per-call micropayments
  • —Accessing stored email attachment data without API key registration

Fit

Best for

  • —Agents needing on-demand email attachment access with no signup
  • —Developers experimenting with x402 micropayment protocols
  • —Low-volume, pay-as-you-go email data retrieval

Not for

  • —Bulk email processing or high-volume attachment downloads (no documented batch support)
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Accessing arbitrary email IDs (endpoint is hardcoded to email ID 3)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/3/attachments \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/3/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and the specific endpoint is not listed among the provider's advertised APIs. Effectively a stub listing.

Warnings

  • —This specific endpoint (/api/v1/emails/3/attachments) is not listed among the provider's advertised APIs on the landing page.
  • —All documentation pages (docs, pricing, API, README) are empty beyond a 'Connect wallet' prompt — no request/response schemas available.
  • —The endpoint appears hardcoded to email ID 3; generalizability to other email IDs is unknown.
  • —Purpose and content of the 'email attachments' resource is unverified.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:02:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/VV9BX8
Retrieve email attachments via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart