x402basequality 0.35

Premium API access subscription endpoint on Base network, paid per-call via x402 in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/subscriptions/172

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" subscription resource accessible via the x402 payment protocol. It accepts POST requests and requires an X-PAYMENT header with a cryptographic payment proof settled in USDC on the Base network.

The endpoint charges a maximum of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). The provider's site advertises a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto market data, and infrastructure utilities—all at the same $0.02/request price point. This specific endpoint (/api/v1/stripe/subscriptions/172) appears to be a subscription-related resource, though its exact response payload is undocumented.

The platform emphasizes no API keys, no rate limits, and instant access. Payment is handled entirely through the x402 protocol on the Base L2 network, paying to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The asset used is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Base mainnet USDC). No OpenAPI schema or detailed documentation was found for this specific endpoint beyond the x402 challenge metadata.

Capabilities

x402-paymentusdc-base-networkpay-per-requestsubscription-managementno-api-key-required

Use cases

  • —Programmatic subscription management via crypto micropayments
  • —Agent-driven access to premium resources without traditional API keys
  • —Automated per-request billing settled on Base L2

Fit

Best for

  • —Agents needing keyless API access with crypto-native payments
  • —Developers wanting pay-as-you-go access without signup
  • —Applications already operating on the Base network with USDC

Not for

  • —Users who need detailed documentation or OpenAPI specs before integrating
  • —Applications requiring fiat-only payment rails
  • —High-volume use cases where per-request pricing may not be cost-effective compared to bulk plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/172 \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/172
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (returns a valid 402 challenge), but there is no OpenAPI schema, no documented request/response format, and the crawled docs pages are empty beyond wallet-connect prompts. The specific purpose of this 'subscriptions/172' resource is unclear.

Warnings

  • —No OpenAPI or request/response schema available for this endpoint
  • —Documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no useful content
  • —The exact behavior and response format of this subscription endpoint is undocumented
  • —Purpose of 'stripe/subscriptions/172' path is ambiguous—may be a demo or placeholder

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:08:32Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/3UmMmT
Premium API access subscription endpoint on Base network, paid per-call via x402 in USDC. — Clawmart · Clawmart