x402basequality 0.30

x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/249

What it does

lowpaymentfee.com offers a collection of pay-per-call API endpoints gated by the x402 protocol on the Base network. The specific endpoint at `/api/v1/charges/249` is labeled "Premium API Access" and accepts payment in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. Payment is made via the x402 exact scheme with a 300-second timeout window.

The broader platform advertises four categories of APIs: 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 listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments.

However, the specific endpoint `/api/v1/charges/249` does not clearly map to any of the named API categories on the landing page. Its description is simply "Premium API Access" with no further documentation about what data or functionality it returns. The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without an OpenAPI schema, request/response examples, or detailed documentation, it is unclear what this particular endpoint actually does when called with a valid payment.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyhttp-post

Use cases

  • —Paying per-call for API access without needing API keys or subscriptions
  • —Programmatic agent access to gated endpoints using x402 USDC payments on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-as-you-go API access on Base
  • —Low-cost per-request API consumption without rate limits

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Production workloads requiring well-documented request/response schemas
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/249 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/249
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns 402 with a valid x402 challenge), but there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality is completely undocumented. The docs/pricing/README pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —The specific endpoint /api/v1/charges/249 has no documentation explaining what it returns or what input it expects.
  • —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no substantive content.
  • —No OpenAPI schema or response examples are available; the actual functionality behind 'Premium API Access' is unknown.
  • —The endpoint path does not match any of the named APIs listed on the landing page.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:34:56Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/MzJgyx
x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart