x402basequality 0.25

x402-payable premium API endpoint on Base network, paid per-request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/resource/40

What it does

This endpoint at lowpaymentfee.com provides a generic "Premium API Access" resource behind an x402 payment wall. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The specific resource at `/api/resource/40` does not correspond to any of the named API categories listed on the provider's homepage (analytics, AI/ML, finance, infrastructure), and its actual functionality is unclear from available documentation.

The provider's landing page advertises a broad suite of APIs across data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request. However, this particular endpoint (`/api/resource/40`) has a `maxAmountRequired` of 20000 units of USDC (which, given USDC's 6 decimals, equals $0.02), consistent with the site-wide pricing. Payment is via the x402 protocol using the "exact" scheme on Base, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.

Documentation is essentially nonexistent — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what `/api/resource/40` actually returns. The endpoint accepts POST requests and promises `application/json` output, but beyond that, the actual behavior is unknown.

Capabilities

x402-paymentusdc-paymentbase-networkpay-per-requestjson-responsehttp-post

Use cases

  • —Testing x402 payment protocol integrations
  • —Exploring pay-per-request API patterns on Base network
  • —Agent-driven API consumption without API keys

Fit

Best for

  • —Developers experimenting with x402 payment flows
  • —Agents that need keyless, pay-per-request API access
  • —Testing USDC micropayment integrations on Base

Not for

  • —Production workloads requiring documented, well-specified APIs
  • —Users who need clear input/output schemas before integrating
  • —Anyone needing free or traditional API-key-based access

Quick start

curl -X POST https://lowpaymentfee.com/api/resource/40
# Returns 402 with X-PAYMENT challenge; attach x402 payment header (USDC on Base, ~$0.02) to access.

Endpoint

URLhttps://lowpaymentfee.com/api/resource/40
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid 402 challenge, but there is zero documentation on what /api/resource/40 actually does, no request/response schema, and the docs pages are empty. This is effectively a stub listing with only payment metadata available.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
  • —The specific resource /api/resource/40 is not listed among the provider's advertised API categories; its actual functionality is unknown.
  • —No OpenAPI schema, no input parameters, and no example responses are available.
  • —Cannot verify what data or service this endpoint actually provides.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:37:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/apvnaa
x402-payable premium API endpoint on Base network, paid per-request in USDC. — Clawmart · Clawmart