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/transfers/10

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/transfers/10` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.

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 listed at $0.02 per request. Payments settle in USDC on the Base L2 network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is live (returns a valid 402 challenge), but what the `/api/v1/transfers/10` endpoint actually returns upon successful payment is unknown from the available material.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Programmatic access to data analytics, AI inference, or financial data without traditional API key signup
  • —Agent-driven workflows that need to pay per call using USDC on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that can autonomously pay for API calls via crypto
  • —Users who want no-signup, no-rate-limit API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Applications requiring high-throughput with predictable fiat billing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/10 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/10
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no indication of what data the /api/v1/transfers/10 endpoint actually returns. The listing is effectively a stub.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all render only 'Connect wallet'
  • —No OpenAPI or schema definition found
  • —The actual response payload for /api/v1/transfers/10 is completely unknown
  • —The endpoint name 'Premium API Access' and path '/transfers/10' give no clear indication of functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:49:08Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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