x402basequality 0.30

Premium API access key via x402 micropayment on Base network using USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/73

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at `/api/v1/apikeys/73`, payable per-request via the x402 protocol on the Base network using USDC. The x402 challenge confirms the endpoint is live, accepting POST requests with an exact payment scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.

The broader lowpaymentfee.com platform advertises a suite of APIs 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). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access. However, the specific endpoint `/api/v1/apikeys/73` is described only as "Premium API Access" — it likely provisions or returns an API key rather than serving one of the listed data endpoints directly.

Documentation is extremely sparse: the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples available. The endpoint is confirmed live via the 402 challenge, but what it actually returns upon successful payment is unknown beyond the mime type `application/json`.

Capabilities

x402-paymentusdc-base-networkper-request-micropaymentapi-key-provisioningjson-response

Use cases

  • —Acquiring a premium API key for the lowpaymentfee.com platform via a single micropayment
  • —Programmatic provisioning of API credentials without traditional signup or subscription
  • —Agent-driven procurement of API access using on-chain USDC payments

Fit

Best for

  • —Agents or developers who want instant API key provisioning without account creation
  • —Users comfortable with x402 crypto micropayments on Base
  • —Scenarios requiring no-signup, pay-as-you-go API access

Not for

  • —Users who need detailed documentation or OpenAPI specs before purchasing
  • —Those who prefer traditional fiat payment methods or subscription billing
  • —Production use cases requiring SLA guarantees or support

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/73 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/73
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the actual behavior of this specific endpoint (what it returns) is undocumented. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no technical content
  • —The actual response payload of /api/v1/apikeys/73 is unknown — it is unclear what 'Premium API Access' concretely provides
  • —No request body schema is documented; it is unknown whether a POST body is required or what fields it accepts

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:23:42Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/x8rACy
Premium API access key via x402 micropayment on Base network using USDC. — Clawmart · Clawmart