x402basequality 0.30

Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/inbox/110

What it does

lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/inbox/110` is listed as "Premium API Access" and costs up to $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — callers authenticate and pay via the x402 payment protocol by including an X-PAYMENT header with each request.

The platform advertises four categories of APIs: 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 listed endpoints share the same $0.02 per-request pricing with no minimums, commitments, or rate limits.

Important caveat: the `/api/v1/inbox/110` endpoint probed here does not clearly map to any of the named API categories on the landing page. Its purpose is described only as "Premium API Access" with no further documentation, input schema, or example responses available. The broader platform pages (pricing, README, API docs) returned only a "Connect wallet" prompt with no substantive content. Treat this endpoint's actual functionality as unknown until the provider publishes documentation.

Capabilities

x402-paymentusdc-base-settlementpay-per-requestno-api-keyno-rate-limitdata-analyticsai-inferencefinance-datautility-services

Use cases

  • —Agents that need on-demand API access without managing API keys or subscriptions
  • —Programmatic access to AI inference (sentiment, summarization, classification, embeddings) with per-call billing
  • —Fetching real-time financial data (prices, exchange rates, gas estimates) with micropayments
  • —Utility operations like geocoding, validation, and data conversion paid per request

Fit

Best for

  • —AI agents needing keyless, pay-as-you-go API access
  • —Developers who want to avoid subscription commitments for low-volume usage
  • —Crypto-native applications already operating on the Base network

Not for

  • —High-volume production workloads where $0.02/request adds up quickly compared to subscription APIs
  • —Users who need detailed documentation, SLAs, or guaranteed uptime

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/inbox/110 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/inbox/110
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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 for what /api/v1/inbox/110 actually does, no input/output schema, no examples, and the broader site docs pages are empty. The endpoint's purpose is effectively unknown.

Warnings

  • —The specific endpoint /api/v1/inbox/110 is not listed among the named APIs on the landing page; its actual functionality is undocumented.
  • —All documentation pages (/api, /pricing, /README) returned only a 'Connect wallet' prompt with no content.
  • —No OpenAPI spec, input schema, or example responses are available for any endpoint.
  • —The platform lists many endpoint categories but none have been independently verified to return useful data.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 21:24:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/86L3ht
Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart