x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/326

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a collection of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities, all priced at $0.02 per request and settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific endpoint `/api/v1/charges/326` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json and the input method is HTTP POST.

Note that while the landing page advertises many different API paths (analytics, AI sentiment, summarization, embeddings, finance prices, geocoding, etc.), the specific functionality behind `/api/v1/charges/326` is not documented beyond the generic label "Premium API Access." No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl. The docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no substantive content.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseno-api-key

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment flows
  • —Agents needing keyless API access with crypto micropayments
  • —Low-volume, on-demand API consumption without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume batch processing where per-call fees add up quickly
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/326 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/326
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic label. The docs pages are empty ('Connect wallet' only). The actual functionality behind this specific charge ID is unknown.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The specific functionality of /api/v1/charges/326 ('Premium API Access') is undocumented — it is unclear what data or service it returns
  • —All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content
  • —The landing page lists many API paths but this specific charge endpoint does not map clearly to any of them

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:52:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/9AVmUV
Pay-per-request premium API access on Base via x402 — $0.02/call in USDC. — Clawmart · Clawmart