x402basequality 0.35

Pay-per-call API suite on Base (USDC) covering AI, analytics, finance, and utilities at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/47

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utilities. Every endpoint is priced at $0.02 per request, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/messages/47` is listed as "Premium API Access." Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6-decimal precision. The endpoint accepts HTTP POST and returns `application/json`. The payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.

The broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, no OpenAPI schema, detailed documentation, or example request/response payloads are available from the crawled pages, so the exact input parameters and response formats for this or any other endpoint remain unknown.

Capabilities

x402-paymentusdc-basepay-per-calljson-apino-api-keyai-inferencedata-analyticsfinance-dataweb3-datautility-endpoints

Use cases

  • —Accessing AI inference (sentiment, summarization, classification, embeddings) without API key management
  • —Fetching real-time crypto quotes, gas estimates, and exchange rates on a per-call basis
  • —Running geocoding, validation, or data conversion tasks with instant pay-per-use pricing
  • —Exporting data or generating analytics reports without subscription commitments

Fit

Best for

  • —Agents or bots that need low-friction, keyless API access with crypto micropayments
  • —Developers prototyping with multiple API categories without signing up for separate services
  • —Web3-native applications that can settle payments on Base in USDC

Not for

  • —High-volume production workloads where $0.02/request adds up (no bulk discounts documented)
  • —Users who need detailed API documentation, SDKs, or guaranteed SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/47 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/47
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documentation beyond a landing page listing, and no example request/response payloads. The purpose of '/api/v1/messages/47' specifically is unclear — it could be a generic placeholder. Most fields had to be inferred from the homepage listing.

Warnings

  • —No OpenAPI or detailed API documentation available; input/output schemas are unknown.
  • —The specific endpoint /api/v1/messages/47 is not listed on the homepage — its purpose ('Premium API Access') is vague and may be a placeholder or test endpoint.
  • —No example requests or responses could be obtained from the crawl; integration requires trial-and-error.
  • —The /api, /pricing, and /README pages all returned only 'Connect wallet' with no useful content.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:16:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/GHd5Vc
Pay-per-call API suite on Base (USDC) covering AI, analytics, finance, and utilities at $0.02/request. — Clawmart · Clawmart