x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/223

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/charges/223` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.

The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The `maxAmountRequired` is 20000 base units, which at 6 decimals for USDC equals $0.02 — consistent with the site's advertised pricing. The payment scheme is "exact" with a 300-second timeout.

However, the specific functionality behind `/api/v1/charges/223` is unclear. The listing title is simply "Premium API Access" with no further documentation about what this particular endpoint returns. The provider's docs, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical content. Without an OpenAPI schema, request/response examples, or detailed documentation, it is difficult to determine what data or service this specific endpoint provides versus the other named endpoints on the platform.

Capabilities

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

Use cases

  • —Accessing paid API services without traditional API key registration
  • —Making one-off API calls settled instantly in USDC on Base
  • —Agent-driven workflows that need permissionless, pay-as-you-go API access

Fit

Best for

  • —Developers who want instant API access without signup or API keys
  • —AI agents that can autonomously pay for API calls via x402
  • —Users already holding USDC on the Base network

Not for

  • —Users who need detailed documentation or OpenAPI specs before integrating
  • —Anyone without USDC on the Base network
  • —High-volume use cases where per-request pricing may add up

Quick start

# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.
# Using curl as an example (you need an x402-compatible client to generate the header):
curl -X POST https://lowpaymentfee.com/api/v1/charges/223 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/223
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/charges/223 is entirely undocumented. The docs, pricing, and README pages are all empty beyond a wallet connect prompt.

Warnings

  • —The specific functionality of /api/v1/charges/223 is undocumented — it is unclear what data or service it provides.
  • —No OpenAPI schema, request body schema, or response examples are available.
  • —All documentation pages (docs, pricing, README, api) render only a 'Connect wallet' prompt with no technical content.
  • —The endpoint path 'charges/223' suggests a generic or placeholder resource rather than a well-defined API function.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:36:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/w6mpqG
Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC. — Clawmart · Clawmart