x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/198

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/charges/198` 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 equals $0.02. The payment scheme is "exact," meaning the caller pays the precise amount per request. Timeout is 300 seconds.

However, the specific functionality behind `/api/v1/charges/198` is unclear — it does not correspond to any of the named endpoints listed on the provider's landing page (e.g., analytics, AI, finance, or utility APIs). The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional documentation or schema details. Without knowing what this particular endpoint returns, callers should treat it as an opaque premium resource. The provider's broader catalog advertises sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — all at the same $0.02 price point.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium data or services without API key registration
  • —Making one-off paid API calls settled in USDC on Base
  • —Agent-driven workflows that need instant, keyless API access
  • —Programmatic micropayment-gated resource retrieval

Fit

Best for

  • —Developers who want keyless, pay-per-use API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed documentation or guaranteed SLAs before calling
  • —Anyone without a Base-compatible USDC wallet
  • —Use cases requiring free or high-volume bulk access

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/charges/198 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/198
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example requests or responses, and the specific function of /api/v1/charges/198 is unknown. The docs pages are empty beyond a wallet-connect prompt.

Warnings

  • —The specific functionality of /api/v1/charges/198 is not documented — it does not match any named endpoint on the provider's landing page.
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
  • —No OpenAPI spec, request schema, or response schema is available.
  • —The broader provider catalog lists many endpoints but none at this exact path; this may be a generic or test charge resource.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:33:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Xy8BNH
Pay-per-request premium API access on Base via x402 — $0.02/call in USDC. — Clawmart · Clawmart