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/100/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments through a pay-per-call x402 protocol. The specific resource `/api/v1/emails/100/attachments` accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equals $0.02 per request. Payment is handled via the x402 exact scheme with no API keys or rate limits required.

The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of x402-gated APIs across categories including data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. However, the specific endpoint being listed here is for email attachments, which is not prominently documented on the provider's landing page. The crawled documentation pages (docs, api, pricing, README) all returned minimal content (just a "Connect wallet" prompt), so there is no detailed schema, request/response format, or usage documentation available for this endpoint.

Without documentation on what request body to send or what the response looks like, the practical utility of this endpoint is difficult to assess. The x402 challenge confirms the endpoint is live and accepting payment negotiations, but the actual functionality behind the paywall remains opaque.

Capabilities

x402-paymentemail-attachmentsusdc-basepay-per-requestno-api-key

Use cases

  • —Programmatically retrieving attachments from a specific email resource
  • —Agent-driven email attachment fetching with per-call micropayments
  • —Integrating email attachment access into automated workflows without API key management

Fit

Best for

  • —Agents needing on-demand email attachment retrieval with no subscription
  • —Developers wanting key-free, pay-per-use email data access on Base network
  • —Automated pipelines that need low-cost attachment fetching

Not for

  • —Bulk email processing requiring detailed documentation and guaranteed SLAs
  • —Users who need comprehensive API documentation before integrating
  • —Non-crypto users who cannot pay via USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/100/attachments \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/100/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is zero documentation on request/response schemas, no OpenAPI spec, and the endpoint's specific functionality (email attachments) is not mentioned anywhere on the provider's site. Effectively a stub listing.

Warnings

  • —No documentation available — docs, api, pricing, and README pages all return only a 'Connect wallet' prompt with no content.
  • —The endpoint path '/api/v1/emails/100/attachments' is not listed among the provider's advertised APIs on the landing page, raising questions about whether this is a production resource.
  • —Request and response schemas are completely unknown; no example payloads are available.
  • —The hardcoded '100' in the path suggests this may be a specific email ID rather than a general-purpose endpoint.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:05:00Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/F6jwaB
Retrieve email attachments via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart