x402basequality 0.35

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/transactions/175

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/transactions/175` is listed as "Premium API Access" and advertises a max cost of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call. The x402 challenge confirms it accepts POST requests and returns `application/json`. However, the crawled site does not list a `/api/v1/transactions/175` route among its documented endpoints, and the site's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no substantive content. As a result, the actual functionality behind this specific endpoint is unclear — it may be a generic transaction endpoint or a placeholder.

The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. All are priced uniformly at $0.02 per request. The x402 challenge is live and well-formed, confirming the endpoint is operational at the protocol level.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Accessing API services without creating an account or managing API keys
  • —Making one-off paid API calls from autonomous agents using x402 protocol
  • —Paying for API access with USDC on Base L2 for low transaction fees

Fit

Best for

  • —Developers wanting frictionless, keyless API access via crypto micropayments
  • —AI agents that need to autonomously purchase API calls on-chain
  • —Users who prefer pay-per-use pricing with no subscriptions or commitments

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/175 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/175
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint works at the protocol level. However, the specific endpoint /api/v1/transactions/175 is not documented anywhere on the site, no OpenAPI schema exists, documentation pages are empty (just 'Connect wallet'), and there are no request/response examples. The actual functionality of this endpoint is unknown.

Warnings

  • —The endpoint /api/v1/transactions/175 is not listed among the site's documented APIs — its actual functionality is unclear.
  • —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content.
  • —No OpenAPI schema, request/response examples, or detailed documentation available.
  • —The broader platform lists many endpoint categories but none match this specific path.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:21:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/jEvg9e
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart