x402basequality 0.30

Pay-per-call API platform on Base via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/wire/44

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/wire/44` is listed as "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02 per call, since USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The broader platform advertises multiple API categories including 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 listed at the same $0.02/request price point. However, the specific functionality behind `/api/v1/wire/44` is not documented beyond the label "Premium API Access," so its exact behavior is unclear.

The endpoint is live and returns a valid x402 challenge (HTTP 402) with payment details pointing to USDC on Base (contract 0x8335…2913). The payment recipient is 0x1A2B…85F3. The output schema indicates it accepts HTTP POST requests and is marked as discoverable. Documentation pages on the site (/docs, /pricing, /api, /README) all returned minimal content (just "Connect wallet"), so detailed request/response schemas are unavailable.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyhttp-postpremium-api-access

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, on-demand API access
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that need frictionless pay-per-call API access without credentials
  • —Users who want to avoid API key management and subscription commitments

Not for

  • —Users who need detailed API documentation or well-defined request/response schemas
  • —High-volume use cases where per-request pricing may add up compared to subscription plans
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/wire/44 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/wire/44
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is essentially no documentation for what /api/v1/wire/44 actually does. All doc pages return only 'Connect wallet' with no schemas, examples, or descriptions of request/response formats. The listing is effectively a stub with confirmed liveness.

Warnings

  • —The specific functionality of /api/v1/wire/44 ('Premium API Access') is completely undocumented — it is unclear what data or service it provides.
  • —All documentation pages (/docs, /pricing, /api, /README) returned minimal content ('Connect wallet') with no useful information.
  • —No request or response schema is available; callers cannot know what to send or what to expect back.
  • —The platform lists many API categories (AI, finance, data, etc.) but none are documented beyond endpoint names and prices.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:07:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/DeUGR2
Pay-per-call API platform on Base via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart