x402basequality 0.35

x402-gated premium API access on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/subscriptions/103

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network and settled in USDC.

The specific endpoint `/api/v1/stripe/subscriptions/103` is listed as "Premium API Access" and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's uniform $0.02/request pricing. Payment is made via the x402 exact scheme: callers attach an X-PAYMENT header with a signed payment authorization, and the endpoint returns an `application/json` response. No API keys or rate limits are advertised; access is instant upon payment.

Documentation on the site is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the "Premium API Access" endpoint actually returns. The endpoint name suggests it may relate to Stripe subscription management, but this is speculative. The x402 challenge is live and well-formed, confirming the endpoint is operational.

Capabilities

x402-payment-gatedusdc-settlementbase-networkper-request-pricingjson-responseno-api-key-required

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic access to gated services settled on Base L2

Fit

Best for

  • —Developers or agents wanting key-less, pay-per-use API access
  • —Users already holding USDC on Base who want frictionless API calls
  • —Automated workflows that need instant access without signup

Not for

  • —Users who need detailed API documentation or request/response schemas before integrating
  • —Anyone looking for free or fiat-only payment options
  • —Production use cases requiring SLA guarantees or support

Quick start

# The endpoint requires an x402 X-PAYMENT header with a signed USDC authorization on Base.
# Using curl (you need an x402-compatible client to construct the payment header):
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/103 \
  -H "X-PAYMENT: <signed-x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/103
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint is operational and priced at $0.02/request in USDC on Base. However, there is no OpenAPI spec, no request/response documentation, no examples, and the endpoint's actual functionality ("Premium API Access") is completely undocumented. Docs pages render only a wallet-connect prompt.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no technical content.
  • —No OpenAPI or schema describing request parameters or response format.
  • —The endpoint path '/api/v1/stripe/subscriptions/103' suggests Stripe subscription functionality, but this is unconfirmed and may be misleading.
  • —Actual functionality behind 'Premium API Access' is unknown — integrate with caution.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:46:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/UEk6Ty
x402-gated premium API access on Base, paid per-call in USDC. — Clawmart · Clawmart