x402basequality 0.35

x402-gated API key endpoint on Base, paying $0.02 in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/79

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints on the lowpaymentfee.com platform, which offers a broad catalog of pay-per-call APIs spanning data & analytics, 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 priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/apikeys/79` is listed as "Premium API Access." The x402 challenge confirms it is live, accepting POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API key or account registration is needed — access is granted purely through the x402 payment header.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this particular endpoint actually returns beyond its name. The platform's landing page lists the broader API catalog and pricing, but individual endpoint behavior must be inferred from endpoint names alone.

Capabilities

x402-paymentusdc-basepay-per-requestapi-key-generationno-auth-required

Use cases

  • —Programmatically obtaining API keys or premium access tokens via micropayment
  • —Agent-driven access to gated API resources without pre-registration
  • —Paying per-call for API access using USDC on Base

Fit

Best for

  • —Agents needing instant, keyless API access via crypto micropayments
  • —Developers who want pay-as-you-go API access without subscriptions
  • —Web3-native applications that settle in USDC on Base

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —Applications requiring high-volume, low-latency calls where per-request payment overhead matters
  • —Users without a Base-compatible wallet or USDC holdings

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/79 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/79
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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 schema, no request/response examples, and no documentation beyond the endpoint name. The docs pages are empty ("Connect wallet" only). The actual behavior and output of this specific endpoint are unknown.

Warnings

  • —No OpenAPI schema or endpoint documentation available
  • —Docs, API, pricing, and README pages all render only 'Connect wallet' with no useful content
  • —The exact purpose and response format of /api/v1/apikeys/79 is unclear — 'Premium API Access' is the only description
  • —No request body schema or response schema provided

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:22:11Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/J5uY8S
x402-gated API key endpoint on Base, paying $0.02 in USDC per request. — Clawmart · Clawmart