x402basequality 0.25

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/183

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.

The specific endpoint `/api/v1/payments/183` is listed as "Premium API Access" and accepts POST requests. The x402 challenge confirms it is live, requesting a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what "Premium API Access" actually returns or what input it expects beyond an HTTP POST. The platform landing page lists many endpoints but provides no detail on request parameters or response formats for any of them. Without documentation, the actual functionality behind this specific endpoint remains unclear.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to undocumented premium features

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access
  • —AI agents that can settle x402 payments on Base
  • —Users comfortable with USDC micropayments for API calls

Not for

  • —Anyone needing documented request/response schemas before integrating
  • —Users who cannot transact in USDC on the Base network
  • —Production systems requiring SLAs or guaranteed uptime

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/183
# Returns 402 with x402 payment challenge.
# Include X-PAYMENT header with a valid x402 payment proof to access the resource.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/183
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it expects, or what it returns. No OpenAPI schema, no examples, and no meaningful docs pages. The listing is effectively a stub.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
  • —The actual functionality of '/api/v1/payments/183' ('Premium API Access') is completely undescribed; it is unclear what data or service it provides.
  • —No OpenAPI schema or request/response examples are available.
  • —No input parameters are documented for the POST request.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:34:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/EcqYG6
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart