x402basequality 0.30

Pay-per-call API suite on Base (USDC) covering analytics, AI, finance, and utilities at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/resource/19

What it does

lowpaymentfee.com offers a collection of x402-enabled API endpoints accessible via per-request USDC micropayments on the Base network. The specific endpoint at /api/resource/19 is labeled "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.

The broader platform advertises endpoints across four categories: 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 listed endpoints share the same $0.02/request pricing. The payment is settled on-chain to address 0x1A2B…85F3 using USDC (contract 0x8335…2913) on Base.

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 example payloads available. The specific functionality behind /api/resource/19 is not described beyond the generic "Premium API Access" label, making it unclear what data or service it actually returns.

Capabilities

x402-paymentusdc-micropaymentbase-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API resources without traditional API key registration
  • —Making one-off data or AI inference requests paid per call via USDC on Base
  • —Integrating pay-as-you-go API calls into autonomous agent workflows

Fit

Best for

  • —Developers who want keyless, pay-per-request API access
  • —AI agents with Base USDC wallets needing on-demand API calls
  • —Prototyping workflows that require low-commitment API usage

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume production workloads where subscription pricing is more economical
  • —Developers without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/resource/19 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/resource/19
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 zero documentation on what /api/resource/19 actually does, no request/response schemas, no examples, and all doc pages render only 'Connect wallet'. The listing is effectively a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'
  • —No OpenAPI spec or request/response schema provided
  • —The specific functionality of /api/resource/19 ('Premium API Access') is completely undocumented
  • —Cannot verify what data or service is returned by this endpoint

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:39:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/LmBbA6
Pay-per-call API suite on Base (USDC) covering analytics, AI, finance, and utilities at $0.02/request. — Clawmart · Clawmart