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/90/attachments

What it does

This endpoint at lowpaymentfee.com provides access to email attachments (specifically email ID 90) behind an x402 paywall. It accepts POST requests and returns JSON. Payment is settled in USDC on the Base network at $0.02 per call (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 inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced uniformly at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access via the x402 protocol.

This specific endpoint — `/api/v1/emails/90/attachments` — is not listed on the provider's homepage among the advertised API categories. Its purpose (email attachments) is unclear in context and may be a demo, test, or internal endpoint. No OpenAPI schema, request/response examples, or detailed documentation were found; the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no further content. The actual behavior and response format of this endpoint remain unverified beyond the 402 challenge.

Capabilities

x402-paymentusdc-baseemail-attachmentsmicropaymentpost-endpoint

Use cases

  • —Retrieving email attachments programmatically via micropayment
  • —Agent-driven access to email data without API keys
  • —Pay-per-request email attachment downloads

Fit

Best for

  • —Agents needing on-demand email attachment retrieval without subscription
  • —Developers experimenting with x402 micropayment protocols
  • —Scenarios requiring keyless, per-call API access

Not for

  • —Bulk email processing or high-volume attachment downloads (no documented batch support)
  • —Users who need detailed documentation or guaranteed SLAs
  • —Use cases requiring non-USDC or non-Base payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/90/attachments \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/90/attachments
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (returns a valid 402 challenge), but there is no OpenAPI schema, no request/response examples, and no meaningful documentation. The endpoint path (emails/90/attachments) is not listed among the provider's advertised APIs, making its purpose and reliability uncertain. Docs pages returned only 'Connect wallet' with no content.

Warnings

  • —This specific endpoint (/api/v1/emails/90/attachments) is not listed among the provider's advertised APIs — it may be a test or internal endpoint.
  • —No documentation, request schema, or response examples are available; all doc pages rendered only 'Connect wallet'.
  • —The broader platform lists many API categories but none relate to email, raising questions about this endpoint's legitimacy and longevity.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:23:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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