x402basequality 0.30

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/charges/4

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no commitments required.

This specific endpoint (/api/v1/stripe/charges/4) is listed as "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live, settling payments in USDC (contract 0x8335…2913) on Base. The maxAmountRequired is 20000 base units, which at 6 decimals equals $0.02 — consistent with the site's advertised flat pricing. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation 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 spec, no request/response schema documentation, and no examples of what this particular endpoint accepts or returns. The endpoint path suggests it may relate to Stripe charge creation or retrieval, but this is speculative. Without documentation, callers will need to experiment to discover the expected request body and response format.

Capabilities

x402-paymentusdc-settlementbase-networkper-request-pricingpost-endpointno-api-keypay-per-use

Use cases

  • —Paying per-call for API access without needing API keys or subscriptions
  • —Programmatic access to premium endpoints settled in USDC on Base
  • —Agent-driven API consumption with built-in x402 payment flow

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can handle x402 payment challenges natively
  • —Users who prefer crypto-settled micropayments over traditional billing

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Applications requiring guaranteed SLAs or enterprise support
  • —Developers who cannot transact in USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/4 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/charges/4
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The endpoint path ('stripe/charges/4') is opaque, and the docs pages are empty. This is effectively a stub listing.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema definition; request body and response format are unknown
  • —Endpoint path '/api/v1/stripe/charges/4' is ambiguous — unclear what 'Premium API Access' actually provides
  • —No robots.txt or agents.txt present

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:35:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/W6xfQg
x402-gated premium API access on Base, paid per-call in USDC. — Clawmart · Clawmart