x402basequality 0.30

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/transactions/304

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/transactions/304` 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/transactions/304`) is labeled "Premium API Access" but its actual functionality is not documented beyond that label. The docs, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical documentation. There is no OpenAPI spec, no request/response schema, and no examples available, making it difficult to determine what data or service this specific endpoint returns.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing premium data or transaction information via a single micropayment
  • —Integrating pay-per-use API calls into agent workflows without managing API keys
  • —Programmatic access to services settled in USDC on Base

Fit

Best for

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

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume callers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/304 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/304
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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 spec, no request/response schema, no documentation beyond a label, and no examples. The actual functionality of this specific endpoint is unknown.

Warnings

  • —No OpenAPI or schema documentation available — actual endpoint functionality is unclear
  • —All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no technical content
  • —The endpoint is labeled 'Premium API Access' but what it returns is not documented
  • —Request body format and response structure are entirely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:06:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/7BqqZ6
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart