x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/204

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The `/api/v1/payments/204` endpoint is described as "Premium API Access" and accepts USDC payments at a maximum cost of $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises 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 specific functionality behind the `/api/v1/payments/204` endpoint is unclear beyond its title. Prospective users should be aware that the actual capabilities of each endpoint are unverified and undocumented.

Capabilities

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

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment flows
  • —Agents needing keyless API access with crypto micropayments
  • —Low-volume, on-demand API consumption without subscriptions

Not for

  • —Production workloads requiring documented, well-specified API contracts
  • —Users who need detailed request/response schemas before integration
  • —High-throughput use cases where $0.02/request adds up significantly

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/204 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/204
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual functionality behind this specific endpoint is undocumented.

Warnings

  • —No OpenAPI or schema documentation available — endpoint behavior is unknown beyond its title
  • —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no technical content
  • —The specific purpose of /api/v1/payments/204 ('Premium API Access') is vague and undifferentiated
  • —No request or response examples are available anywhere in the crawled material

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:47:18Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/nvM2LQ
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart