x402basequality 0.30

Pay-per-request premium API access on Base network via x402 protocol at $0.02/call.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/19

What it does

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

The specific endpoint `/api/v1/collections/19` is labeled "Premium API Access" but its exact functionality is not documented beyond the generic description. The x402 challenge confirms it accepts POST requests, settles in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, and charges a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.

The platform advertises a broad suite of APIs at the same price point, but documentation pages (docs, pricing, README) all render only a "Connect wallet" prompt with no further technical detail. Without an OpenAPI spec or response examples, the exact input/output schema for this particular collection endpoint remains unknown.

Capabilities

x402-paymentpay-per-requestbase-networkusdc-settlementno-api-keyno-rate-limits

Use cases

  • —Accessing premium data or services without subscription commitments
  • —Agent-driven API consumption with per-call crypto payments
  • —Testing x402 protocol integrations on Base network

Fit

Best for

  • —Developers wanting zero-commitment pay-per-use API access
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer crypto micropayments over API key management

Not for

  • —Users needing detailed API documentation before purchasing
  • —High-volume consumers who need bulk pricing or SLAs
  • —Users without access to USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/19 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/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 no documentation, no OpenAPI spec, no request/response examples, and the actual functionality of '/api/v1/collections/19' is completely opaque. Docs pages only show 'Connect wallet' with no content.

Warnings

  • —Exact functionality of /api/v1/collections/19 is undocumented
  • —No OpenAPI spec or response schema available
  • —All documentation pages render only 'Connect wallet' with no technical content
  • —Cannot verify what data or service is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 17:54:01Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/bJuwAE
Pay-per-request premium API access on Base network via x402 protocol at $0.02/call. — Clawmart · Clawmart