x402basequality 0.25

x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/389

What it does

lowpaymentfee.com is a platform offering a suite of pay-per-request APIs gated by the x402 protocol on the Base network. The specific endpoint at `/api/v1/charges/389` is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, with a maximum amount required of 20,000 base units — equivalent to $0.02 per call (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required; callers simply attach an X-PAYMENT header to each request.

The broader platform advertises endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing. However, the specific endpoint `/api/v1/charges/389` does not clearly map to any of these named services — its description is simply "Premium API Access" with no further documentation on what data or functionality it returns.

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 spec, no request/response schema, and no examples available. The endpoint is confirmed live (returns a valid 402 challenge), but without knowing what it actually does beyond accepting a POST and returning `application/json`, callers should proceed with caution.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data without creating an account or managing API keys
  • —Making one-off paid API calls settled instantly in USDC on Base
  • —Integrating pay-per-request endpoints into autonomous agent workflows

Fit

Best for

  • —Developers who want zero-signup, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users comfortable with crypto-native payment flows

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible wallet or USDC balance
  • —Applications requiring high-throughput batch processing with predictable billing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/389 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/389
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no indication of what this specific endpoint actually returns. The docs pages are all empty wallet-connect stubs. This is effectively a stub listing.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt with no content.
  • —The specific endpoint /api/v1/charges/389 has no description beyond 'Premium API Access'; its actual functionality is unknown.
  • —No OpenAPI spec or request/response schema is provided; callers cannot know what to send or what to expect back.
  • —No examples or error handling documentation available.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:01:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/XCAM75
x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys. — Clawmart · Clawmart