x402basequality 0.30

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/240

What it does

lowpaymentfee.com offers a suite of pay-per-call API endpoints gated by the x402 protocol on the Base network. The specific endpoint at `/api/v1/charges/240` 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 — which, at 6 decimals for USDC, equals $0.02 per request. 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 are priced at $0.02 per request. However, the specific endpoint being listed here (`/api/v1/charges/240`) does not clearly map to any of those 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 additional technical content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a valid 402 x402 challenge), but what it actually does beyond accepting payment is unknown from the available sources.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Paying per API call without needing API keys or subscriptions
  • —Integrating x402-compatible agents with low-cost endpoints on Base
  • —Testing x402 protocol payment flows against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-per-request API access
  • —Low-cost micropayment API consumption on Base L2

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Production workloads requiring well-documented request/response schemas
  • —Anyone needing non-crypto payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/240 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/240
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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 the endpoint actually returns. The docs pages are all blank 'Connect wallet' stubs. The endpoint path '/api/v1/charges/240' doesn't match any of the named services on the homepage.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README all render only 'Connect wallet' with no content
  • —The endpoint path /api/v1/charges/240 does not correspond to any of the named API services listed on the homepage
  • —No request or response schema is available; it is unknown what this endpoint returns
  • —No OpenAPI specification or examples found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:34:58Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/3Dkzme
x402-gated premium API access on Base, pay $0.02 per request in USDC with no API keys. — Clawmart · Clawmart