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/trades/3

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/3` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.

This particular endpoint (`/api/v1/trades/3`) falls under a "trades" path that is not explicitly listed on the homepage's catalog, so its exact response payload is unclear. The endpoint accepts POST requests and returns `application/json`. No OpenAPI schema, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing trade data or executing trade-related queries with per-call USDC micropayments
  • —Integrating a keyless, pay-as-you-go API into agent workflows on Base network
  • —Programmatic access to premium data without subscription commitments

Fit

Best for

  • —Developers wanting zero-commitment, per-request API billing
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto-native micropayments over traditional API key subscriptions

Not for

  • —Users who need free or ad-supported API access
  • —Applications requiring detailed OpenAPI documentation or SDKs before integration
  • —High-volume consumers who would benefit from bulk/subscription pricing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/trades/3 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/3
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no documentation beyond a wallet-connect prompt, no example request/response payloads, and the /api/v1/trades/3 path is not described on the homepage catalog. The actual functionality of this specific endpoint is unknown.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The /api/v1/trades/3 path is not listed in the homepage's API catalog — its purpose is unclear
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content
  • —Response payload structure is entirely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:51:05Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/BP3Q3L
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart