x402basequality 0.25

x402-gated premium API endpoint on Base, pay-per-request with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/resource/39

What it does

This endpoint at lowpaymentfee.com/api/resource/39 is an x402 protocol-gated API labeled "Premium API Access." It accepts POST requests and returns application/json responses. Payment is handled via the x402 exact scheme on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), with a maximum cost of 20,000 units (in USDC's 6-decimal representation, this equates to $0.02 per request).

The provider site lowpaymentfee.com hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are advertised at $0.02 per request with no API keys, no rate limits, and no commitments required.

However, this specific endpoint (/api/resource/39) does not correspond to any of the documented API paths on the provider's landing page, which use versioned routes like /api/v1/ and /api/v2/. There is no documentation, schema, or description explaining what /api/resource/39 actually does beyond the generic label "Premium API Access." The docs, pricing, and other pages returned only a wallet-connect prompt with no substantive content. Without further documentation, the exact functionality of this endpoint remains unknown.

Capabilities

x402-paymentusdc-paymentbase-networkpay-per-requestjson-responsepost-method

Use cases

  • —Accessing a pay-per-request API without needing API keys or subscriptions
  • —Making programmatic payments via x402 protocol on the Base network
  • —Agent-driven API consumption with per-call USDC micropayments

Fit

Best for

  • —Developers experimenting with x402 pay-per-request protocols
  • —Agents that can handle on-chain USDC payments on Base
  • —Use cases requiring keyless, commitment-free API access

Not for

  • —Users who need clear documentation on what the endpoint returns
  • —Production workloads requiring well-documented and stable API contracts
  • —Anyone unable to transact USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/resource/39
# Returns 402 with x402 payment challenge.
# Include X-PAYMENT header with a valid x402 payment token (USDC on Base) to access the resource.

Endpoint

URLhttps://lowpaymentfee.com/api/resource/39
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and payment parameters are clear, but there is zero documentation on what /api/resource/39 actually does. The path doesn't match any documented route on the site. No input/output schema, no examples, and all secondary pages returned only wallet-connect stubs.

Warnings

  • —Endpoint path /api/resource/39 does not match any documented API route on the provider's landing page
  • —No documentation, input schema, or output schema available for this specific endpoint
  • —Docs, pricing, and README pages returned no useful content (only wallet-connect prompts)
  • —Actual functionality of this endpoint is completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:39:57Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4YGfRh
x402-gated premium API endpoint on Base, pay-per-request with USDC. — Clawmart · Clawmart