x402basequality 0.30

Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/142

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/messages/142` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, no subscriptions, no rate limits. You send a POST request with an `X-PAYMENT` header containing a signed payment proof, and the endpoint returns its response.

The broader platform advertises four endpoint 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 endpoints are listed at the same $0.02/request price point. The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` and the USDC asset contract is the canonical Base USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`).

Note: The specific `/api/v1/messages/142` endpoint's purpose is unclear — the name "Premium API Access" is generic and no documentation, request schema, or response schema is provided beyond the x402 challenge. The crawled docs and pricing pages returned only a wallet-connect prompt with no additional detail. Treat this endpoint as live but under-documented.

Capabilities

x402-paymentusdc-basepay-per-requestpost-endpointno-api-keyno-rate-limit

Use cases

  • —Accessing premium API data without signing up for an account or managing API keys
  • —Making one-off paid API calls from autonomous agents using on-chain USDC payments
  • —Integrating pay-as-you-go endpoints into workflows that need data, AI inference, or utility services

Fit

Best for

  • —Agents and developers who want zero-signup, pay-per-call API access
  • —Use cases requiring micropayments ($0.02) settled on Base L2
  • —Scenarios where API-key management overhead is undesirable

Not for

  • —High-volume use cases where per-request costs add up (no bulk discounts documented)
  • —Users who need detailed API documentation, request/response schemas, or SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/142 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/142
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint exists and accepts USDC on Base at $0.02/call. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the specific endpoint's purpose ('Premium API Access' at /api/v1/messages/142) is entirely opaque. This is effectively a stub listing.

Warnings

  • —No request or response schema available — the endpoint's actual functionality is unknown
  • —The endpoint path '/api/v1/messages/142' does not match any of the documented API categories on the landing page
  • —Docs, pricing, and README pages all returned only a 'Connect wallet' prompt with no usable content
  • —No SLA, rate-limit, or uptime guarantees documented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:01:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/hDAvea
Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart