x402basequality 0.30

x402-gated Premium API Access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/167

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall on the Base network. The specific resource path is `/api/v1/charges/167`, which is one of many endpoints offered by the lowpaymentfee.com platform. The platform advertises a broad catalog spanning 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).

Payment is settled on-chain via USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20000 base units; since USDC uses 6 decimals, this equals $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The platform emphasizes no API keys, no rate limits, and instant access.

However, the specific functionality behind `/api/v1/charges/167` is unclear — the description is simply "Premium API Access" with no further documentation, input schema, or example responses available. The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what this particular endpoint returns, agents should treat this as a generic paid endpoint whose actual utility is unverified.

Capabilities

x402-paymentusdc-baseper-request-billingno-api-keyjson-response

Use cases

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

Fit

Best for

  • —Developers exploring x402 payment protocol
  • —Agents needing keyless, pay-per-call API access
  • —Low-cost per-request billing without commitments

Not for

  • —Users needing well-documented API contracts with clear input/output schemas
  • —High-volume use cases where $0.02/request adds up quickly
  • —Anyone requiring offline or fiat-only payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/167 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/167
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no examples, and the actual functionality behind this specific path is entirely undescribed. Docs pages returned only 'Connect wallet' with no content.

Warnings

  • —The specific functionality of /api/v1/charges/167 is undocumented — 'Premium API Access' is the only description available.
  • —All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no substantive content.
  • —No input or output schema is provided; callers cannot know what to send or what to expect back.
  • —The platform lists many endpoint categories (AI, finance, analytics, etc.) but this specific charge endpoint's relationship to those categories is unclear.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:19:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/JkdQXC
x402-gated Premium API Access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart