x402basequality 0.25

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/114

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall, settling payments in USDC on the Base network. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the x402 exact scheme, requiring an X-PAYMENT header with each POST request.

The broader lowpaymentfee.com platform advertises a suite of APIs spanning 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 $0.02 per request with no API keys, no rate limits, and instant access. However, this specific endpoint (/api/v1/stripe/subscriptions/114) is labeled "Premium API Access" and its exact functionality is not documented beyond that title.

The endpoint is live and returns a valid x402 challenge (HTTP 402). Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what data or service this particular endpoint actually returns. The "stripe/subscriptions" path segment suggests it may relate to Stripe subscription management, but this is speculative.

Capabilities

x402-paymentusdc-settlementbase-networkper-request-billingpost-endpoint

Use cases

  • —Programmatic access to a premium API service with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
  • —Testing x402 payment flows against a live endpoint

Fit

Best for

  • —Developers exploring x402 payment protocol integrations
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring no-signup, no-API-key access

Not for

  • —Users who need detailed documentation or OpenAPI specs before integrating
  • —Applications requiring free or fiat-only payment methods
  • —Production workloads that need guaranteed SLAs or support

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/114 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/114
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does beyond the label 'Premium API Access'. The docs pages are empty. Functionality must be guessed from the URL path.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or output schema provided; request and response formats are unknown
  • —The endpoint path '/api/v1/stripe/subscriptions/114' suggests Stripe subscription functionality but this is unconfirmed
  • —Actual service behind 'Premium API Access' is undocumented and unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:46:09Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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