x402basequality 0.30

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/83

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is part of a broader platform that offers a variety of pay-per-call API endpoints 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 on the platform are priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/apikeys/83` is labeled "Premium API Access" and returns a live x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) via the "exact" scheme. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the endpoint actually returns. The platform advertises no API keys, no rate limits, and instant access, but the actual behavior and output of this particular endpoint remain undocumented.

Capabilities

x402-paymentusdc-basepay-per-requestapi-key-generationjson-response

Use cases

  • —Purchasing API access keys via micropayment without traditional signup
  • —Programmatic agent-driven acquisition of API credentials
  • —Pay-as-you-go access to a multi-category API platform

Fit

Best for

  • —Agents or scripts that need instant API access without registration
  • —Developers wanting to test x402 payment flows on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/83 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/83
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request parameters, response schema, or what "Premium API Access" actually delivers. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. Without knowing what the endpoint returns, this is effectively a stub listing.

Warnings

  • —No OpenAPI spec or request/response schema available
  • —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
  • —The actual output of /api/v1/apikeys/83 is completely undocumented — unclear what 'Premium API Access' returns
  • —No examples or integration guides available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:24:08Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/BH3Jgy