x402basequality 0.30

Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/messages/179

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Each call costs $0.02 in USDC on the Base network, settled on-chain with no API keys, no rate limits, and no subscriptions required.

The specific endpoint at `/api/v1/messages/179` is listed as "Premium API Access" and accepts POST requests. 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 decimals. Payment is made via the x402 exact scheme with a 300-second timeout.

The broader platform advertises endpoints for 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/request price point. However, the crawled documentation is extremely thin: the /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no further technical documentation, schemas, or example payloads. Without request/response schemas or usage examples, it is unclear what input format this specific endpoint expects or what it returns.

Capabilities

x402-paymentusdc-basepay-per-requestpost-endpointno-api-keyno-rate-limit

Use cases

  • —Accessing premium API content with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, on-demand API access
  • —Prototyping integrations without subscription commitments

Fit

Best for

  • —Developers who want zero-commitment, pay-as-you-go API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer on-chain micropayments over API key management

Not for

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

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/messages/179 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/messages/179
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no API documentation, no request/response schema, no examples, and the endpoint's actual functionality ("Premium API Access" / "messages/179") is completely opaque. The /api, /pricing, and /README pages returned no useful content.

Warnings

  • —No request or response schema available — the endpoint's actual functionality is unknown
  • —All documentation pages (/api, /pricing, /README) returned only 'Connect wallet' with no technical content
  • —The endpoint path '/api/v1/messages/179' with description 'Premium API Access' gives no indication of what data or service it provides
  • —No OpenAPI spec, no ai-plugin manifest, no agents.txt discovered

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:05:09Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/64nCQr
Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments. — Clawmart · Clawmart