x402basequality 0.25

x402-gated email data endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/emails/78

What it does

This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/78`) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals), settled to a specified wallet address.

The broader lowpaymentfee.com platform advertises a range of pay-per-request API endpoints spanning data & analytics, AI & machine learning (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 call. The platform emphasizes no API keys, no rate limits, and instant access via x402 on the Base network.

However, the specific `/api/v1/emails/78` endpoint is not listed among the publicly documented APIs on the landing page, and no documentation, request schema, or response schema is available for it. The crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without further documentation, the exact functionality of this email endpoint — whether it retrieves email data, validates an email, or performs some other operation — remains unclear.

Capabilities

x402-paymentusdc-basepay-per-requestemail-datahttp-post

Use cases

  • —Retrieving or accessing email-related data behind a micropayment wall
  • —Agent-driven workflows that need on-demand email information without API key management
  • —Programmatic access to premium email resources paid per call in USDC

Fit

Best for

  • —Agents or developers who want keyless, pay-per-request email data access
  • —Use cases requiring micropayment-gated API calls on Base L2
  • —Workflows that benefit from no rate limits and instant access

Not for

  • —Users who need well-documented API schemas and response formats before integrating
  • —High-volume use cases where per-request pricing at $0.02 adds up significantly
  • —Anyone needing non-crypto payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/emails/78 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/emails/78
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no request/response schema, and the specific /api/v1/emails/78 path is not listed among the provider's publicly advertised endpoints. The crawled docs/pricing/README pages are empty stubs. This is effectively a stub listing with minimal actionable information.

Warnings

  • —The /api/v1/emails/78 endpoint is not listed among the provider's publicly documented APIs — its exact purpose is unknown.
  • —No request or response schema is available; integration requires trial and error.
  • —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no content.
  • —The nature of the 'email' resource at ID 78 is unclear — it could be test data, a specific record, or a placeholder.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 19:22:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/zvJ8Ta
x402-gated email data endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart