x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/trades/25

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/trades/25` is listed under "Premium API Access" and accepts POST requests. The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access.

The broader platform offers endpoints across 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). However, the specific `/api/v1/trades/25` endpoint probed here does not appear in any of these listed categories on the landing page, and its exact functionality is unclear — the description simply says "Premium API Access."

The x402 challenge confirms the endpoint is live, accepting payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the "exact" scheme. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schema for this endpoint is unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Accessing trade-related data via a single pay-per-call request without needing an API key
  • —Integrating low-cost API calls into agent workflows that settle payments in USDC on Base
  • —Programmatic access to premium data endpoints with no subscription or rate limits

Fit

Best for

  • —Developers wanting zero-setup API access with crypto micropayments
  • —AI agents that can autonomously pay for API calls via x402
  • —Users who prefer pay-as-you-go pricing without commitments

Not for

  • —Users who need detailed API documentation or well-defined 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/trades/25 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/25
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific endpoint /api/v1/trades/25 is not documented on the landing page, no request/response schema is available, and all documentation pages returned only 'Connect wallet' with no content. The actual functionality of this endpoint is unknown.

Warnings

  • —The endpoint /api/v1/trades/25 does not appear in the platform's listed API catalog — its purpose is unclear
  • —All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no substantive content
  • —No request body schema or response schema is available for this endpoint
  • —The platform lists many endpoint categories but provides no detailed documentation for any of them

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:47:15Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/vmuAHY
Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart