x402basequality 0.40

Pay-per-request API suite on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/orders/12

What it does

lowpaymentfee.com offers a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/orders/12` is labeled "Premium API Access" and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is settled on-chain with no API keys, no rate limits, and no subscriptions required.

The broader platform advertises four categories of endpoints: 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 per request price point and use the x402 exact-payment scheme on Base.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The specific behavior and response format of `/api/v1/orders/12` ("Premium API Access") is unclear from the available material; the name suggests order retrieval but no schema or sample output is provided.

Capabilities

x402-paymentpay-per-requestbase-networkusdc-settlementdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocodingno-api-key

Use cases

  • —Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management
  • —Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-request basis
  • —Running data analytics queries and exporting data with pay-as-you-go pricing
  • —Using utility services like geocoding, validation, and conversion without subscriptions

Fit

Best for

  • —Agents and developers who want zero-signup, pay-per-call API access
  • —Crypto-native applications that can settle payments in USDC on Base
  • —Low-volume or bursty workloads where subscription pricing is wasteful

Not for

  • —High-volume production workloads needing guaranteed SLAs and detailed documentation
  • —Users without a Base-compatible wallet or USDC holdings
  • —Applications requiring well-documented, schema-validated API contracts

Quick start

# The endpoint returns 402 with an x402 challenge.
# Use an x402-compatible client to pay and access:
curl -X POST https://lowpaymentfee.com/api/v1/orders/12 \
  -H 'Content-Type: application/json'
# Response: 402 with accepts[] containing USDC payment details on Base.
# After attaching X-PAYMENT header with signed payment, you receive the resource.

Example

Response

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://lowpaymentfee.com/api/v1/orders/12",
      "description": "Premium API Access",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/orders/12
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.40/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response documentation, no usage examples, and the docs pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint ('orders/12') is ambiguous.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content
  • —The specific endpoint /api/v1/orders/12 ('Premium API Access') has an unclear purpose — 'orders/12' suggests a hardcoded resource ID rather than a general-purpose API
  • —No information on uptime, SLAs, or rate limits beyond the marketing claim of 'no rate limits'

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:49:51Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/eLZhCE