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/transactions/24

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are paid per-request using USDC on the Base network at a flat rate of $0.02 per call. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/transactions/24` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and returns `application/json`. The broader platform advertises additional categories including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point.

Documentation is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled pages. The actual functionality behind each endpoint cannot be verified from the available material.

Capabilities

x402-paymentper-request-billingusdc-base-networkjson-apipost-methodno-api-keydata-analyticsai-inferencefinance-dataweb3-datautility-services

Use cases

  • —Agents that need on-demand API access without managing API keys or subscriptions
  • —Programmatic access to analytics, AI inference, or financial data with per-call USDC payments
  • —Web3-native applications that want to consume utility APIs settled on Base

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents with x402-compatible payment capabilities on Base
  • —Projects needing low-cost per-request pricing without rate limits

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Callers without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/24 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/24
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network. However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The actual functionality behind 'Premium API Access' at /api/v1/transactions/24 is unclear.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The specific purpose of /api/v1/transactions/24 ('Premium API Access') is not explained anywhere
  • —Cannot verify what data or functionality any endpoint actually returns

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:45:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/Mp6szy
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart