x402basequality 0.25

x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/trades/171

What it does

lowpaymentfee.com hosts a collection of x402-protocol pay-per-request API endpoints on the Base network, settling payments in USDC. The specific endpoint `/api/v1/trades/171` is listed as "Premium API Access" and returns an x402 challenge requiring a payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers endpoints across several 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 uniformly priced at $0.02 per request.

However, the specific functionality of `/api/v1/trades/171` is not documented beyond the generic "Premium API Access" label. The crawled docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available for this or any other endpoint on the platform. The endpoint is confirmed live (402 challenge captured), but what data or service it actually returns upon successful payment is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keytrades-data

Use cases

  • —Fetching trade-related data via a single paid API call without needing an API key
  • —Integrating pay-per-request trade data into an autonomous agent workflow
  • —Programmatic access to premium trade information settled on-chain via USDC on Base

Fit

Best for

  • —Agents or developers wanting zero-signup, pay-per-call API access
  • —Use cases requiring on-chain payment settlement (no credit card needed)
  • —Low-volume or sporadic access patterns where $0.02/request is cost-effective

Not for

  • —Users who need detailed API documentation or response schema guarantees before paying
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone needing non-USDC or non-Base-network payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/trades/171 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/171
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' at /api/v1/trades/171 is completely opaque. All doc pages returned only 'Connect wallet' with no content.

Warnings

  • —No documentation available — all doc/pricing/API/README pages return only 'Connect wallet' with no substantive content
  • —The specific data returned by /api/v1/trades/171 is unknown; 'Premium API Access' is the only description
  • —No OpenAPI schema or response examples exist; callers cannot know the response format before paying
  • —No robots.txt or agents.txt found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:37:29Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/V3DmHU
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart