x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/keys/62

What it does

lowpaymentfee.com offers a collection of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/keys/62` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an x402 payment header to each request.

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 the same $0.02/request price point.

However, the specific functionality behind `/api/v1/keys/62` ("Premium API Access") is not documented beyond its title. There is no OpenAPI schema, no request/response examples, and the crawled docs and pricing pages returned only a wallet-connect prompt with no additional detail. The endpoint is confirmed live — it returns a valid 402 challenge — but what it actually returns upon successful payment is unknown from the available material.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Agent-driven API consumption with per-call USDC micropayments
  • —Accessing premium data or services without managing API keys or subscriptions
  • —Programmatic pay-as-you-go access from wallets or x402-enabled clients

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access
  • —AI agents with x402-compatible payment capabilities
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before paying
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Anyone without a Base-network USDC wallet or x402 client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/keys/62 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/keys/62
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation explaining what this specific endpoint actually does or returns. The listing is effectively a stub with only a title and price.

Warnings

  • —No documentation exists for what /api/v1/keys/62 returns upon successful payment
  • —No OpenAPI or output schema provided — request and response formats are unknown
  • —Crawled /api, /pricing, and /README pages all returned only a wallet-connect prompt with no useful content
  • —The generic name 'Premium API Access' does not clarify the endpoint's purpose

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:18:37Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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