x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transfers/171

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request using the x402 protocol, settling payments in USDC on the Base network. The specific endpoint at `/api/v1/transfers/171` is listed as "Premium API Access" and accepts POST requests.

The platform advertises a flat $0.02 per request across its catalog, with no API keys, no rate limits, and no minimum commitments required. The x402 challenge captured from this endpoint shows a maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — 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 detailed description of what the `/api/v1/transfers/171` endpoint actually returns. The broader site lists categories (analytics, AI, finance, infrastructure) but provides no specifics about data sources, model details, or response formats. The endpoint is confirmed live (402 challenge returned), but the lack of documentation makes it difficult to assess actual functionality.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestpost-endpointno-api-key

Use cases

  • —Accessing pay-per-call API services without API key registration
  • —Making micropayments for API access using USDC on Base
  • —Agent-driven API consumption with x402 payment protocol

Fit

Best for

  • —Developers wanting zero-commitment pay-per-use API access
  • —x402-compatible agents that can settle USDC on Base
  • —Users who prefer no-signup, wallet-based API authentication

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integration
  • —High-volume consumers who need bulk pricing or rate guarantees
  • —Anyone without a Base-compatible wallet or USDC holdings

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/transfers/171 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/171
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does beyond the generic label 'Premium API Access'. The docs/pricing/API pages are all empty wallet-connect stubs.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or schema describing request parameters or response format for /api/v1/transfers/171
  • —The endpoint name 'Premium API Access' is generic and does not describe actual functionality
  • —Cannot verify what data or service this endpoint provides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:02:56Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/pFLG8j
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart