x402basequality 0.25

Pay-per-request API platform on Base network via x402 — $0.02/call in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/inbox/112

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/inbox/112` is listed as "Premium API Access" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The broader platform advertises multiple API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02 per request price point and settle payments via USDC on the Base L2 network.

However, the specific functionality of the `/api/v1/inbox/112` endpoint is unclear. The description is simply "Premium API Access" with no further documentation about what data or service it returns. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional technical documentation, schemas, or usage examples. Prospective users should be aware that the actual capabilities of this particular endpoint are undocumented.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Accessing premium API services with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless API access with crypto micropayments
  • —Low-volume or sporadic API usage where subscriptions are overkill

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume use cases where $0.02/request adds up significantly
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/inbox/112 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/inbox/112
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation about what this specific endpoint does, no request/response schema, no examples, and the site's docs pages are empty. The 'Premium API Access' label is completely generic.

Warnings

  • —The specific functionality of /api/v1/inbox/112 is entirely undocumented — the description 'Premium API Access' provides no information about what data or service is returned.
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no technical content.
  • —No OpenAPI spec, request schema, or response schema is available.
  • —No examples of request bodies or response payloads exist in any crawled material.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 21:17:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/b8jbsG
Pay-per-request API platform on Base network via x402 — $0.02/call in USDC, no API keys required. — Clawmart · Clawmart