x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/238

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities, all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/charges/238` is labeled "Premium API Access" in the x402 challenge. The challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per call. Payment is made via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns application/json.

However, the actual functionality behind this particular charge ID (238) is unclear. The site lists many distinct API paths (analytics, AI, finance, utilities) but this endpoint's path (`/api/v1/charges/238`) does not directly correspond to any of those listed categories. Documentation pages (/docs, /pricing, /README) returned only a "Connect wallet" prompt with no substantive content. Without further documentation or example responses, the precise data or service returned by this endpoint cannot be confirmed.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseno-api-key

Use cases

  • —Programmatic access to premium API services without subscription or API key management
  • —Agent-driven workflows that need on-demand API calls settled in USDC on Base
  • —Integrating pay-per-use endpoints into Web3 applications

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents with Base USDC wallets needing frictionless endpoint access
  • —Prototyping and low-volume usage where subscriptions are overkill

Not for

  • —High-volume production workloads where per-call pricing becomes expensive
  • —Users without a Base-compatible USDC wallet
  • —Anyone needing detailed documentation or SLA guarantees

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/238 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/238
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 request/response schema, and no clarity on what 'Premium API Access' at /api/v1/charges/238 actually returns. All doc pages render only a wallet-connect prompt.

Warnings

  • —No documentation available — /docs, /pricing, and /README all return only a 'Connect wallet' prompt with no content
  • —The specific functionality of /api/v1/charges/238 ('Premium API Access') is undefined; it does not match any of the listed API paths on the homepage
  • —No request body schema or response examples are available
  • —No OpenAPI spec or AI plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:35:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/ZTr3Bt