x402basequality 0.30

x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/trades/75

What it does

lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/trades/75` is listed as "Premium API Access" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme with no API keys, rate limits, or subscriptions required.

The broader platform advertises four categories of endpoints: 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 listed endpoints share the same $0.02/request pricing. However, documentation beyond the landing page is essentially empty — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail.

The `/api/v1/trades/75` endpoint itself is live and returns a proper 402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation describing what "trades/75" actually returns or what input it expects. The endpoint's purpose — whether it returns trade data, executes a trade, or something else — cannot be determined from the available material.

Capabilities

x402-paymentusdc-micropaymentbase-networkper-request-billingno-api-keypost-endpoint

Use cases

  • —Accessing trade-related data or functionality via a single micropayment per call
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-per-use access to premium data endpoints

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/trades/75 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/75
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing, but there is zero documentation on what the endpoint does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The purpose of 'trades/75' is entirely opaque.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
  • —The purpose and expected input/output of /api/v1/trades/75 are completely undocumented.
  • —No OpenAPI or schema definition is provided for any endpoint.
  • —The broader platform lists many endpoints but none have documented request/response formats.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:47:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/eNUAG7
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart