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/230

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 using USDC on the Base network at a flat rate of $0.02 per call, with no API keys, no rate limits, and no minimum commitments required.

The specific endpoint at `/api/v1/transactions/230` 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 via the x402 exact scheme with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.

The broader platform advertises endpoints in four 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 (geocoding, validation, conversion, generation). Documentation pages (/docs, /pricing, /api, /README) all resolve but appear to require wallet connection and contain no substantive content, so details about request/response schemas, actual model capabilities, and data sources remain unknown.

Capabilities

x402-paymentper-request-billingusdc-basejson-apino-api-keyhttp-post

Use cases

  • —Agents that need on-demand API access without pre-registration or API keys
  • —Paying per-call for analytics, AI inference, or financial data via crypto micropayments
  • —Integrating x402-compatible endpoints into automated workflows on Base

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents with x402 payment capability on Base
  • —Low-volume or bursty workloads where flat per-request pricing is economical

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —High-volume production workloads requiring bulk pricing or rate-limit guarantees
  • —Users without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/230 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/230
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, documentation pages are effectively empty (wallet-gated), there is no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' at /api/v1/transactions/230 is unexplained. The listing is essentially a stub with confirmed liveness and pricing.

Warnings

  • —All documentation pages (/docs, /pricing, /api, /README) require wallet connection and contain no readable content
  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —The specific purpose of /api/v1/transactions/230 ('Premium API Access') is not described anywhere
  • —The platform advertises many endpoint categories but none have documented schemas or example payloads

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:45:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

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