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/317

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are paid per-request at $0.02 each using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required. The x402 protocol handles payment inline: callers attach a payment header and the server verifies on-chain settlement before returning the response.

The specific endpoint at `/api/v1/transactions/317` is listed as "Premium API Access" and accepts POST requests. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is settled to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

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 endpoints. Documentation pages exist at /docs, /pricing, and /README but currently render only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for individual endpoints are unknown.

Capabilities

x402-paymentper-request-billingusdc-base-networkdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datacrypto-quotesgas-estimatesgeocodingvalidationconversion

Use cases

  • —Accessing AI inference (sentiment, summarization, classification, embeddings) on a pay-per-call basis without API key management
  • —Fetching real-time crypto quotes, gas estimates, and exchange rates with per-request USDC micropayments
  • —Running data analytics queries and exporting reports without subscription commitments
  • —Geocoding, validation, and data conversion utilities paid per use

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Projects needing low-cost micropayment-gated endpoints without rate limits

Not for

  • —Users without a Base-compatible USDC wallet
  • —High-volume consumers who need bulk/subscription pricing
  • —Anyone requiring detailed API documentation or guaranteed SLAs (docs are currently empty)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/317 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/317
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and all doc pages render only 'Connect wallet'. The specific purpose of /api/v1/transactions/317 ('Premium API Access') is vague and undifferentiated from the rest of the catalog. Effectively a stub listing.

Warnings

  • —Documentation pages (/docs, /pricing, /README) return no useful content — only a 'Connect wallet' prompt
  • —No request or response schema available for this endpoint
  • —The endpoint path '/api/v1/transactions/317' with description 'Premium API Access' does not clearly indicate what data or service it provides
  • —No OpenAPI spec or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:07:18Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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