x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/185

What it does

This endpoint at lowpaymentfee.com is part of a broader suite of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint `/api/v1/messages/185` is labeled "Premium API Access" and accepts POST requests. Payment is 0.02 USDC per call (maxAmountRequired of 20,000 base units with 6 decimals), with no API keys, no rate limits, and instant access advertised by the provider.

The provider's landing page lists four categories of endpoints: 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 (geocoding, validation, conversion, generation). All are priced at $0.02 per request. However, the specific `/api/v1/messages/185` endpoint does not clearly map to any of these listed categories, and no documentation, request schema, or response schema is available for it. The endpoint is live and returns a valid x402 402 challenge, confirming it is operational.

Without OpenAPI specs, example requests/responses, or detailed documentation beyond the landing page listing, the exact functionality of this particular endpoint remains unclear. The provider site's /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no additional content.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Accessing premium API content with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Programmatic access to services without subscription commitments

Fit

Best for

  • —Developers wanting zero-commitment pay-per-call API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer crypto micropayments over API key management

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before purchasing
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume use cases where per-request pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/185 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/185
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI schema, no documentation, no example requests or responses, and the specific endpoint path (/api/v1/messages/185) does not match any of the documented API categories on the landing page. Functionality is essentially unknown.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The endpoint path /api/v1/messages/185 does not correspond to any of the listed API categories on the provider's homepage
  • —Provider's /api, /pricing, and /README pages returned no useful content beyond a wallet connect prompt
  • —Exact functionality and expected request/response format are unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:04:28Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/QFDhXG
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart