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/41/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 41) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with 6 decimals = $0.02).

The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access via the x402 protocol.

However, this specific endpoint (`/api/v1/emails/41/attachments`) is not listed among the advertised APIs on the landing page, and no documentation exists describing its request body schema, expected parameters, or response format. The docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without further documentation, the exact functionality and expected input for this endpoint remain unclear.

Capabilities

x402-paymentusdc-baseemail-attachmentspost-jsonmicropayment

Use cases

  • —Retrieving email attachments programmatically via micropayment
  • —Agent-driven access to stored email data behind a paywall
  • —Automated document retrieval from email storage

Fit

Best for

  • —Agents needing on-demand email attachment retrieval without API keys
  • —Developers experimenting with x402 micropayment protocols
  • —Workflows requiring pay-per-use access to specific email content

Not for

  • —Bulk email processing or high-volume attachment downloads (no documented batch support)
  • —Users needing detailed API documentation or schema guarantees before integration
  • —General-purpose email sending or SMTP functionality

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/41/attachments \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/41/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific endpoint, no request/response schema, and the endpoint path is not listed among the platform's advertised APIs. Docs pages returned no content. This is effectively a stub listing.

Warnings

  • —This specific endpoint (/api/v1/emails/41/attachments) is not listed among the platform's advertised APIs — its purpose and expected inputs are unclear.
  • —No request body schema or response schema is documented anywhere.
  • —All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no substantive content.
  • —The endpoint references a hardcoded email ID (41); it is unknown whether other email IDs are accessible or what data is returned.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:04:29Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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