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/charges/119

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints gated by the x402 protocol on the Base network. This specific endpoint (`/api/v1/charges/119`) is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract `0x8335…2913` on Base) at a maximum cost of 20,000 base units, which equals $0.02 per call (USDC uses 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 lowpaymentfee.com 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 listed endpoints share the same $0.02/request pricing.

Documentation is extremely sparse — the /docs, /pricing, /api, 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 usage examples available from the crawled material. The specific functionality behind `/api/v1/charges/119` ("Premium API Access") is not described beyond its title, making it unclear what data or service it returns.

Capabilities

x402-paymentper-request-billingusdc-settlementbase-networkpost-endpointno-api-keyno-rate-limits

Use cases

  • —Agents that need to call APIs without pre-registering for API keys
  • —Programmatic access to paid endpoints using on-chain USDC micropayments
  • —Demonstrating x402 protocol integration for pay-per-request services

Fit

Best for

  • —Developers exploring x402 protocol-based API monetization
  • —AI agents with Base-network USDC wallets needing keyless API access
  • —Low-volume, pay-as-you-go API consumption at $0.02/call

Not for

  • —Users who need detailed API documentation or response schemas before integrating
  • —High-volume consumers who need bulk pricing or subscription plans
  • —Callers without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/119 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/119
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual functionality behind 'Premium API Access' at /api/v1/charges/119 is completely undescribed. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no content
  • —No OpenAPI or schema describing request parameters or response format for this endpoint
  • —The specific purpose of /api/v1/charges/119 ('Premium API Access') is not explained anywhere in the crawled material
  • —Cannot verify what data or service is actually returned upon successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:15:35Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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